DYNAMIC CONDUCTANCE

TUBE & TRANSISTOR TESTER

f£/CO*
131-01 39th Ave., FlLshirtg, N- Y. 11352

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k.
 MODEL 667 ADDENDUM - TRANSISTOR

(For Instruction Manual)

An Improved procedure has been developed for transistor testing, which is described in the
following revision of steps 5 to 8 on page 7 of the Instruction Manual. No transistor chart is

provided, as it is not required when using the revised test procedure. With the great number of
transistors now available, a transistor handbook would be needed, in any case, to determine the
type (p-n-p or n-p-n) and basing of all the transistors to be encountered.

Revised Steps 5 to 8, Page 7 of the INSTRUCTION MANUAL:

5. Refer to a transistor handbook for the type (p-n-p or n-p-n) and basing of the transistor to be
tested. Note that only signal transistors can be tested with the instrument and the criteria
described below apply only to signal transistors (not power transistors).
*

6. Insert the emitter (E), base (B), and collector (C) lead of the transistor In the corresponding
terminals of the transistor socket located immediately above the TRANSISTOR TEST selector,

7. Turn the TRANSISTOR TEST selector from "TUBE" to position 1 (first position away from "TUBE")
on the p-n-p or n-p-n side depending on the type of transistor under test. The indication on
the meter will be proportional to the collector current with emitter grounded and no base
signal. On this test, transistors in good condition should preferably read in the "Ico GOOD"
area between 0 and 40 on the 0 to 140 meter scale, but are acceptable with readings up to 80
on this scale. Reject transistor that reads above 80 on this test.

8. Turn the TRANSISTOR TEST selector to position 2 (second position away from "TUBE"), and
read the DC Beta (ratio of collector current to base current). The minimum acceptable DC
Beta reading depends on the Ico reading obtained in step 7. The higher the Ico reading (up to
the maximum acceptable limit of 80), the higher the minimum acceptable DC Beta reading is,
Numerically, the minimum acceptable DC Beta reading is slightly more
in direct proportion*
than 60% of the Ico reading on the 0 to 140 meter scale.
Examples: If the Ico scale reading

is 80, the minimum acceptable DC Beta reading is 50; if the Ico scale reading is 40, the minimum

acceptable DC Beta reading is 25.

Page 9 of the INSTRUCTION MANUAL:

Delete the following material from the text:

"In some cases, the range of Beta given In the chart has been taken directly from the
transistor manufacturer's specification; in other cases Beta has been calculated from the
grounded base Alpha, Alpha ce, according to the relationship:

Alpha ce
Beta = "
1 -Alpha ce

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 MODEL 66 7 ADDENDUM (Continued)

Revise the remaining text as follows:

"These simple tests, when related to each other as described In the test procedure, will
determine If the transistor Is good or bad. They do not, of course, duplicate the factory
frequency response. Input resistance, output resistance, collector capacitance,
tests of
and other electrical characteristics that are necessary for a specific grade of transistor,"

Page 12 of the Instruction Manual:

In Figure n) TRANSISTOR TEST 1, add a shunt resistor R5 across meter Ml.

In Figure o) TRANSISTOR TEST 2, add a shunt resistor R6 across meter Ml.

I. E. 1495 EICO Electronic Instrument Co. Inc,, 131-01 39th Ave, , Flushing, N.Y., 11352

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 667 TUBE TESTER ^ EICQL ,
<• page l

GENERAL DESCRIPTION
The EICO Model 667 Dynamic Conductance Tube & Transistor Tester is one of the first
thoroughly practical service instruments able to test both tubes and transistors. Among its
advantages are rapid and simple operation, close simulation of actual tube operating conditions,
and unexcelled thoroughness and accuracy of test. The outstanding mechanical design and
layout, coupled with components carefully selected for ruggedness, makes the Model 667 extremely
well-suited for the hard usage of daily service work.

All components of the Model 667 tube tester are assembled to the heavy-gauge aluminum
front panel, which is in turn top-mounted by 14 screws to flanges on all four sides of the steel
case. A detachable steel cover is mounted to the back of the case with separable hinges so that
the cover may easily be removed for use of the instrument as a counter -top model or replaced
to convert it back to a portable instrument.

There are ten different tube sockets on the panel to accomodate modern receiving and
other tube types (see Types Tested below). In addition, pilot and Christmas tree lamps can be
checked rapidly using the center of the Novar socket. A special transistor socket accomodates
both n-p-n and p-n-p transistors. To protect against damage due to current overload, a type
3AG 1 ampere fuse is connected in series with the primary of the power transformer.

SPECIFICATIONS

LINE VOLTAGE & FREQUENCY: 105- 130V, 60 cycles. Note: Do not connect to a dc line.

POWER CONSUMPTION: 10 watts with no tube/transistor under test; 50 watts at maximum load.

T YPES TESTED: 5 & 7pin Nuvistors; Novars; Compactrons; 7,9, & lOpin miniatures; 5, 6 & 7
pin sub-miniatures (in-line base); 8-pin sub-miniatures (circular base); octal;
loctal. In addition to receiving types, both domestic and foreign, many
small transmitting and special-purpose tubes, voltage regulators, cold
cathode rectifiers, electron-ray indicators, and ballast tubes are tested.
Tests n-p-n and p-n-p transistors. Pilot lamps are tested in center of
Novar socket. Accessory Model CRU adaptor for testing all color and
black and white picture tubes.
TUBE TESTS: a) Direct-reading of inter-element and cathode heater leakage in ohms on a 0 to
20 megohms scale. DC test voltage always applied in correct polarity to elimi-
nate emission effects from reading, b) Merit test, which is an emission reading
for diodes and rectifiers and a dynamic conductance (combined plate conductance,
mutual conductance, and emission) reading for triodes, tetrodes, andpentrodes.

TRANSISTOR TESTS: N-p-n and p-n-p types.

TRANSISTOR TESTS: a) Leakage measurement of collector current with emitter grounded and
no base signal, b) Direct reading of current amplification factor or
Beta (change in collector current caused by change in base current.

ACCURACY OF LINE VOLTAGE INDICATION: ±3%

SIZE: 12" x 15" x 6"

WEIGHT: 20 lbs.

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 PAGE 2 ««««<« lEICQL, 667 TUBE TESTER
‘

FUNCTIONS OF CONTROLS

A necessary supplement to the operating instructions is the following description of control

functions. Several controls, for example, have unusual secondary functions which must be
understood in making settings.

FILAMENT SELECTOR — The dial of this control indicates rms a-c volts tapped from the
power transformer and applied to the tube filament at each position. Do not take the setting
for granted; check the roll chart and set it to the value shown for the particular tube type. The
last position, marked "Z", is used when checking cold cathode tubes such astheOZ4 for which
the plate voltage of the Model 667 is insufficient to initiate conduction in the tube. The 117 volts
available from the FILAMENT switch is thrown in series with the plate voltage of 180 volts at
the "Z" position to provide a total voltage sufficient to initiate tube conduction. A 3K resistor,
placed in series with this circuit, provides current limiting to protect the tube after the start
of conduction.

LINE ADJ. — This control is a continuously variable potentiometer connected across a portion
of the primary winding. It permits adjustment of transformer secondary voltages to the stand-
ard test values despite line voltage and filament load variations. The LINE push-button serves
to insert a standard resistance in the leakage test circuit which will result in exactly half-scale
deflection (LINE mark) when the LINE ADJ. control has been set properly in relation to the
actual line voltage and filament load. The actual line voltage may be read off the dial of the
LINE ADJ. control with an accuracy of ±3% when line adjustment is made under no-load condi-
tions (no tube inserted for testing).

GRID control —A
continuously variable potentiometer which taps the desired grid voltage up
to a maximum of 5, 15, or 45 volts, depending on the setting of the V lever. A snap switch,
which takes up the first few divisions on the dial, is actuated in the most counter-clockwise
position and inserts a 400S2 current- limiting resistor in series with the plate supply (for high-
current rectifiers). At settings of 7 and above, the resistor is shorted.

PLATE control -- A continuously variable rheostat in series with the meter which acts as a
"fine" adjustment of meter sensitivity in conjunction with the "coarse" adjustment provided by
the "S" lever switch.

LEVER switches 1 through 12 & C -- These are single section six-position switches which con-
nect the similarly numbered tube socket terminals (lever C is for the cap lead) to the proper
voltage sources for the tube which is to be tested. At the 1 position, each switch contacts
ground; at the 2 position, each switch contacts the filament voltage; at the 3 position, each
switch contacts the screen voltage; at the 4 position, each switch contacts plate voltage; in the
5 position, each switch contacts grid voltage; in the 6 position, each switch furnishes an open
circuit.

LEVER V - This is a three section switch with four positions (1 through 4). 5, 15, 45, 90 and
180 volt taps on a separate secondary winding on the transformer are so connected to these
switch sections as to provide selection from four combinations of plate, screen, and grid
voltages. The plate and screen voltages selected are applied through the MERIT switch to the
corresponding position contacts on lever switches 1 through C. The grid voltage selected is
applied to the GRID potentiometer so that the desired portion of the total available voltage can
be accurately tapped off by means of the dial calibration and applied to the grid position contacts
on lever switches 1 through C, also through the MERIT switch. The plate screen, and grid
voltages selected at each position of the V switch are as follows:

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 667 TUBE TESTER lEICO L
L
>
« PAGE 3

POSITION PLATE SCREEN GRID

1 45V ~T5V 0-5V
2 90 45 0-15
3 180 90 0-15
4 180 90 0-45

LEVER S — This is a single section six-position switch which selects the value of shunt resis-
tance placed across the meter and PLATE control potentiometer. As such, lever Sis a "coarse"
meter sensitivity control which is used in conjunction with the "fine" control provided by the
PLATE potentiometer. Position 1 provides the least meter sensitivity for high current tubes
and position 5 the highest sensitivity for low current tubes; intermediate positions provide a
variety of sensitivities necessary for testing the many tube types encountered. At position 6
of the S switch, the grid voltage from the V switch is connected through the 24, 000 ohm current-
limiting resistor in testing light-duty diodes.

PUSH-SWITCHES 1 through 12 & C —

Each of these switches serves as a transfer switch for
the tube element connected to the corresponding base pin number. The No. 1 switch controls
all connections to the No. 1 socket terminals; the No. 2 switch controls all connections to the
No. 2 socket terminals; and so forth, in order, through to the No-. 12 switch for the No. 12
terminal of the COMPACTRON
socket. The C switch controls the connections to the cap lead.
These push switches serve the following functions:

With the MERIT and LINE switches at their normal position, depressing one of these switches
transfers the corresponding tube element to one side of the ohmmeter circuit (with the remaining
tube elements all grounded together with the other side of the ohmmeter circuit) as required
for the inter -element leakage tests. These push-switches are also primarily responsible for
two of the outstanding features of this tube tester; one feature being that in the majority of cases
all sections of multi-section tubes draw their normal current when any one section is tested;
the second being the rapid testing afforded multi-section tubes due to the saving in set-uptime.
These advantages are obtained because the push switches permit selection of the tube base pin
which will be connected to the transformer power supply through the meter circuit when the
MERIT switch is pulled down, in order that the current through the corresponding tube element
(normally the plate of a tube or a tube section) be measured for MERIT testing. The remaining
tube base pins (connected to the push switches which are not depressed for the particular MERIT
test) are connected either directly to the transformer power supply or indirectly through a
potentiometer.

RESET push button — This button is a convenience intended to permit restoring of a depressed
push-switch to the normal position.

H-K LEAKage push switch — This is a momentary switch which is used for heater -cathode
leakage testing. When the push switch for an indirectly heated cathode (underlined in the LEAK
column depressed to transfer the cathode to one side of the ohmmeter circuit,
of the roll chart) is
the H-K LEAK button is depressed also to break the ground connection of the remaining "lumped"
elements in order that cathode emission current to these elements will be excluded from the
cathode heater leakage measurement.

TRANSISTOR TEST selector — This is a special five-position multi-circuit switch performing

the following functions: a) At the TUBE position the transistor test socket is de-energized and
the meter connected so as to render it available for line adjustment, leakage testing, and merit
testing; b) At the transistor test positions, it applied a dc bias voltage between the collector and
emitter socket terminals, of polarity depending on whether the n-p-n or p-n-p positions are used.

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 ‘
PAGE 4 -jEWQL, 6 67 TUBE TESTER

At the position for either transistor type, the meter is inserted in the
1 collector circuit
in series with a IK current-limiting resistor to measure the current (I ceo ) under these conditions.
At either 2 position, a 200Kresistor is connected between the collector side of the power supply
and the base to put a small current into the base. The current gain, Beta, is then read on the
meter, which remains in the collector circuit.

WARNING: Be certain as to the type of transistor (n-p-n or p-n-p) you aretesting. Testing
a transistor using the positions designated for the opposite type may damage the
tester meter or the transistor. Note that shorted transistors may cause the
meter to read past full scale at the "N-P-N 1" or "P-N-P 1". Should this
occur, turn the switch back to the "TUBE" position immediately and discard
the defective transistor, after you have first checked to see that the correct
test position was used for the particular type.

SPECIAL SOCKET CONNECTIONS — Several socket terminal connections are not standard and
should be noted. The pilot light socket in the center of the NOVAR socket is connected across
the selected filament voltage (shell to ground, center post to filament switch arm). The center
of the loctal socket is connected to ground. The sub-miniature in-line socket has no numbers
assigned to its seven terminals. In the Model 667, these terminals are connected to the push-
switches as if they were numbered 1 to 7 beginning at the index dot on the panel. However, a
consistent connection procedure has been established (the roll chart settings are given accord-
ingly), which is as follows: With tube base and socket indexes matched (dot or spur on tube
base to dot at right of socket on the panel), the tube leads are inserted in order so as not to skip
any socket terminals starting from the extreme right.

OPERATING INSTRUCTIONS
PRELIMINARY STEPS FOR TUBE OR TRANSISTOR TESTING

1. Insert the power plug in a 105-130 volts AC, 60 cps line outlet. Do not use a DC line
outlet or any AC line outlet other than specified above.
2. Turn the tester on by rotating the LINE ADJ. control clockwise from AC-OFF.

3. Set the TRANSISTOR TEST selector to TUBE, regardless of whether it is a tube or

transistor that is to be tested.

4. Make a preliminary line adjust by holding down the LINE button while turning the LINE
ADJ. control until the meter pointer is over the LINE ADJ. mark on the meter (center scale).
Release the LINE button at the conclusion of the adjustment.

TUBE TESTING CONTINUED

5. Press the RESET button to release any button which may be down from a previous setting.
Make sure the TRANSISTOR TEST selector is set at "TUBE".

6. Move all 15 lever switches down to the "1" position.

7. Rotate one or both roll chart wheels until the tube type you wish to test appears in one
of the windows. Obsolete types will be found in a supplement to this manual.

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 667 TUBE TESTER lEICQL,
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PAGE 5

8. Note the number of lines of settings devoted to the tube in the chart. Each line of
settings corresponds to a section of the tube (1 line for a single diode, triode or pentode; 2 lines
for a double diode, triode or pentagrid converter; 3 lines for a duodide- triode, etc.) Each
section of the tube is tested by making the settings indicated on a single line of the chart and
then depressing the MERIT lever. Note, however, that twin or triple section tubes having
identical tube characteristics will occupy one line with two or three plate numbers in the merit
column instead of the usual single number. Each of these numbers signifies an individual merit
test. Using the same line of settings, perform each individual merit test.

EXAMPLE: 12AT7, twin triode

In the merit column you will find the entry 16 (one, six). Press 1 to read merit of the
first triode. Press 6 to read merit of the second triode.

All interelement leakage testing must be performed before any of the Merit tests, as a
safeguard to the tube tester. The push-button which must be pressed down to complete the
leakage and short testing are all given in the same line or different lines for different sections
of the tube. Specific instructions for making settings and performing the required tests follow.

9. The first 3 settings following the tube type are for the FIL. selector, GRID control and
PLATE control, in that order. Set these controls accordingly.

10. The next 15 settings are for lever switches 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, C, V and S
in that order. Set these levers accordingly.

11. Check all settings to make sure that no mistake has been made.

Insert the tube into the socket which matches its base.
12. (The socket just above the
TRANSISTOR TEST selector is for transistors only. All other sockets are for tubes only). If
the rectangular sub-miniature socket is used, turn the tube so that its index (red dot, black dot,
glass spur) matches the dot on the panel; then insert each lead into a socket terminal in order,
not skipping any socket terminals starting from the right. If there is a top cap on the tube,
connect it with the cap clip lead.

13.Allow sufficient warm-up time before proceeding. For battery-operated tubes and
h. v. rectifiers (1B3 type) warm up is almost instantaneous; for most receiving tubes 10 to 20
seconds; for high power pentodes, triodes, and rectifiers 20-40 seconds. Note that the MERIT
test (step 17) should not be performed until the stated warm-up time has elapsed.

14. Press the LINE button and note the meter reading. Depending on the filament drain
of the tube under test, the meter will read more or less to the left of the LINE ADJ. mark
(center scale). Holding the LINE button down turn the LINE ADJ. control until the meter
pointer is again over the LINE ADJ. mark. Release the LINE button at the conclusion of this
adjustment.

15.Refer to the first (or only) line of settings for the tube and note the buttons listed in
the LEAK column. Press down each of the buttons listed one at a time (in order), observing
the meter each time. (See next paragraph for evaluation of leakage readings. ) The underlined
leakage buttons are for indirectly heated cathodes; when these buttons are depressed, the re-
sulting meter reading will be valid only when the H-K LEAK button is also depressed. Failure
to do so will not normally cause damage to the tube, but will give too low a leakage resistance
reading due to emission to other elements. Thus, the underlined leakage tests are of heater to
cathode leakage only.

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 PAGE 6 ««<«««< iE/CQL1 667 TUBE TESTER
l

On cathode leakage test of light duty diodes in multi-section tyibes, meter will not swing
across the scale as for other type of tubes if tube under test is good, and there is no need to
depress the H-K LEAK button. Underlining of pin No. 2 in case of 6AQ7 merely indicates
cathode. The above also applies to other tubes of similar types such as 6R8, 6S8, and 6T8.

Standard for acceptance of rejection on Inter-Element Leakage (excluding cathode - heater

leakage): No less than 5 megs on any test. A stricter standard for high reliability applications
would be no less than 10 megs on any test.

Standard for Acceptance or Rejection on Cathode-Heater Leakage: Not less than 1 meg for
non-power types; not less than 500K for power types. Half these values may be acceptable for
tubes approaching end of life, with the exception of tubes used in audio preamplifiers which may
not read less than 1 meg at any time.

In general, tubes failing to meet these standards should be discarded. In any case, do not
perform a MERIT test on any tube having an inter -element leakage resistance less than 100K
ohms, as this may damage the tube tester. Note that all required inter-element and cathode-
heater leakage tests for the entire tube have been completed with the tester set up for the first
(or only) MERIT test and before the first (or only) MERIT test is made. No further leakage
testing is performed thereafter.

Note: Depressing the buttons listed in the MERIT column actually tests that element for
leakage until the lever is depressed. A tube giving too low an ohms reading
MERIT
in this condition should not be tested for MERIT.

16. Perform the first (or only) MERIT test on tubes which have been found satisfactory as
to leakage and shorts by first pressing down the button listed in the MERIT column and then
pulling down the MERIT lever switch. With the MERIT lever held down, read the merit (quality)
indication on the DIODES GOOD scale for diodes and rectifiers, or the colored areas and percent
markings for all other tubes. Note that although 100% represents normal conductance for a new
tube, some tubes will read higher and some lower because of the tolerances allowed in tube
manufacturing. Note also that the limits of the GOOD, ? (doubtful), and REPLACE areas are
obtained by striking an average for all tube types and so should not be interpreted in an absolute
manner.

17. If there is more than one line of settings for the tube, leave the tube in the socket and
proceed as follows for each line: a) Reset the lever switches and GRID and PLATE controls
accordingly; b) Depress the button listed in the MERIT column; c) Pull down the MERIT lever
switch to read the quality on the meter of the particular tube section under test.

18. After testing the last section of a tube, remove the tube from the socket of the tube
tester. Push reset button and return all lever switches to "1". Failure to do this can result
in damage to the meter when you proceed to test the next tube.

19. Proceed with testing another tube by beginning with Step 5. If there are no more tubes
or transistors to be tested, turn the LINE ADJ. control counter-clockwise to its AC-OFFposi-
tion. A slide switch at the end of the potentiometer winding opens the primary circuit of the power
transformer and turns the tester off. If there is a transistor to be tested, proceed directly to
step 5 of TRANSISTOR TESTING after completing step 18 of TUBE TESTING.

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 CONTINUE PROCEDURE FOR TRANSISTOR TESTING (From
667 TUBE TESTER -jEICQL1 t
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Step 4, Page 4)
PAGE 7

5. Locate the type number of the transistor to be tested on the transistor chart. Note
whether the transistor is a n-p-n or p-n-ptype and the specified allowable range of Beta. Make
sure that the TRANSISTOR TEST selector is set at "TUBE".

6. Insert the emitter (E), base (B), and collector (C) lead of the transistor in the corres-
ponding terminals of the transistor socket located immediately above the TRANSISTOR TEST
selector.

7. Turn the TRANSISTOR TEST selector from "TUBE" to position Ion the p-n-p or n-p-n
side depending on the type of transistor under test. The indication on the meter will be propor-
tional to the collector current with emitter grounded and no base signal. On this test, transistors
in good condition should read in the "Iceo GOOD" area (between 0 and 40 on the 0 to 140 scale).
Reject transistors that read outside the "Iceo GOOD" area (higher than 40 on theO to 140 scale),
unless note has been made on the chart that a higher reading is acceptable.

8o Turn the TRANSISTOR TEST selector to position 2 and read the current amplification
factor or Beta (change in collector current caused by a change in base current) on the 0 to 140
Beta Scale. A good transistor will read within the allowable range of Beta as given on the chart
for the particular transistor type. Transistors which do not give a reading within the specified
allowable range of Beta may still be useable; see data sheet.

9. Turn the TRANSISTOR TEST selector back to "TUBE" and then remove the transistor
from the transistor socket.

10. Proceed with testing another transistor by beginning with step 5. If there are no more
transistors or tubes to be tested, turn the tester off by turning the LINE ADJ. control to its
AC-OFF position. If there is a tube to be tested, proceed directly to step 5 of TUBE TESTING
after completing step 9 of TRANSISTOR TESTING.

NOTE: The only controls having any effect in transistor testing are the TRANSISTOR TEST
selector, the LINE ADJ. control, and the LINE push-button. Provided that a tube
has not been left inserted in any of the tube sockets, the settings of any other lever
switches, push-buttons or potentiometers on the panel have no effect and are
immaterial.

CIRCUIT DESCRIPTION

It may be of assistance in understanding the functioning of the instrument to examine the

following typical partial schematics, each of which indicates the voltages appliedand the place-
ment of the meter circuit when performing the tests provided (in accordance with the detailed
operating instructions) for tubes and transistors.

NOTE:' Rs denotes the meter shunt resistance selected by S29 (Lever S). 0 1, 0 2, and
0 a-c voltages taken from taps on the high voltage secondary winding of the
3 denote various
power transformer and selected by S28 (Lever V). An asterisk denotes the function of current-
limiting.

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 PAGE 8 «««««««< ^BiCQln 667 TUBE TESTER

The functioning of the Model .667 in each of the various tests furnished is as follows:

INTER-ELEMENT LEAKAGE: A filtered dc test voltage of -70 volts is obtained by rectifying

and filtering (CR1 and Cl) the 50 volts ac obtained from filament winding tap. This voltage is
applied between the tube element isolated by its transfer switch and the remaining tube elements
whose lever switches are set at the plate, screen, and grid voltage busses which are grounded
through the MERIT and H-K switches at their normal positions. The current through this
circuit is read in ohms on the meter. Note that the polarity of the test voltage is evidently such
as to eliminate cathode emission from the reading and that resistor R8and LEAK CAL. rheostat
R7 restrict the total current to 200ua (full scale) even with a dead short. For heater-to-cathode
leakage testing, the connection of the "remaining" elements to ground is broken by depressing
the H-K push-switch to remove them from the circuit and leave in the test circuit the cathode
and heater only. This is necessary because the cathode is placed at a negative voltage with
respect to the "remaining" elements when it is selected by its transfer switch and the consequent
cathode emission current would also register on the meter to give a false low reading of cathode-
heater leakage resistance.

LINE ADJ: For the adjustment, resistor R19 and LINE CAL rheostat R18 (identical to R8 and
R7 respectively) are inserted in the leakage test circuit by depressing the LINE push-switch to
exactly double the total resistance in the circuit and reduce the meter indication to exactly half
scale. The condition for full-scale and half-scale reading, set in initial calibration with the
LEAK CAL. and LINE CAL. rheostat R7 and R 18, is that the LINE ADJUST potentiometer be
set to give 130 volts across the full transformer primary (or 105 volts across the low end of the
primary and the primary tap). The LINE ADJUST potentiometer permits duplication of this
condition over a ±10% variation of the actual line voltage from the nominal value (117 volts).

MERIT TEST: Several of the many configurations that occur in MERIT testing are shown above.
In general, each test furnish a composite indication of cathode emission capability and the
ability of each grid to control the plate current in accordance with the design of the tube, plus
the ability of the plate to receive the regulated current. For diodes and rectifiers, the mea-
surement is simply an emission test. To properly test a great variety of tube types, several
plate, screen and ranges of grid voltage are available from taps on the plate secondary winding
of the transformer for selection by switch S28 (lever V). These voltages are applied through
switch S34 (MERIT) to the plate, screen, and grid bus bars inter -connecting corresponding
terminals on switches S15 through S27 (lever switches 1 through 12 & C). The grid voltage is
variable by R16 (GRID potentiometer) from zero to maximum of the range selected. Note that
the plate, screen, and grid voltage contacts on switches S15 through 27 are grounded at the
normal position of S34 and that plate screen, and grid voltages are only applied when S34 is
pulled down.

o TO 50V TAP

"70V~ ci

O —+

LEAKAGE TEST POWER SUPPLY - Also used for Line Adjust

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 "
667 TUBE TESTER lE/CQl-, <
TRANSISTOR TESTS: At the P-N-P 1 or N-P-N 1 test positions of the TRANSISTOR TEST
PAGE 9

selector, a measurement is made of the collector current that flows when the emitter is grounded
and no signal is applied to the base. This currentis a function of the temperature, the resistivity
of the germanium and, most important, becomes quite large if there is contamination of the
surface of the germanium or if the transistor has been damaged by a short circuit. At the
P-N-P 2 or N-P-N 2 position, a small current is put into the base via the 200K£2 resistor R3
to permit measurement of the collector -to-base amplification factor Beta, sometimes called
Alpha cb. In some cases the range of Beta given in the chart has been taken directly from the
transistor manufacturer’s specification; in other cases Beta has been calculated from the
grounded-base Alpha, Alpha ce, according to the relationship.

Alpha ce
Beta = 1 -Alpha ce

These simple tests will determine if the transistor is good or bad, but will not, of course,
duplicate the factory tests of frequency response, input resistance, output resistance, collector
capacitance and other electrical characteristics that are necessary for a specific grade of
transistor.

CR2

TRANSISTOR TEST POWER SUPPLY

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 PAG E 1 667 TUBE TESTER

-70V -70V -70V -70 V

R8+R7 R8+R7 R8+R7 R8+R7

> 7)« y /<

.TO FIL.VOL. TO FI L. VOLT. TO FIL.VOLT. TO FIL.VOLT.

a) CATHODE -TO-HEATER b) PLATE-TO-ALL c) SCREEN-TO-ALL d) GRID- TO -ALL

LEAKAGE TEST LEAKAGE TEST LEAKAGE TEST LEAKAGE TEST

4>‘ 4)1
-70V
+
Ml (9
R8+R7 Rs
R9 R9
PLATE PLATE

A (J)2
(|)2
d)3
RI9 + RI8 RI6

RI6 GRID
GRID

“ TO FIL.
TO FIL.VOLT. VOLT.

e) LINE ADJUST f) MERIT TEST OF g) MERIT TEST OF TRIODE

TYPICAL PENTODE 1 of a DUO -TRIODE

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 667 TUBE TESTER ^ EICQL « page 11

RIG
GRID

^0tVW
R9 PLATE

—VW
Ml
1
tofil.
VOLT. Rs

i) MERIT TEST of light-duty diodes, (showing

2 of a DUO- TRIO DE one diode section of a triode duo-diode, such
as a 12SQ7).

MERIT TESTING <D' MERIT TEST for

O0I
j) 1)
of OZ4, OY4 cold- power rectifier sec-
cathode gas rectifiers RI7* tion B of full-wave \ RI7*
(test of one section of type.
OZ4 shown). 4

117VAC FROM
PHASE
FIL.WDG. IN
WITH TO I

SUF^
<J>

PROVIDE
FICIENT ^VVV ,

TOFIL
VOLTAGE FOR
INITIATING < VOLT.
CONDUCTION k) MERIT TEST for power rectifier
section A of full-wave type.

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 ‘
PAGE 12 iEICCJL-i 667 TUBE TESTER

Ml
R4
COL

BASE

P-N-P
.. X N-p-N
EMITTER

n) TRANSISTOR TEST 1

(leeo)

AMr
R4 ^
o
E
FIL. VOLTAGE
BASE! *
'K N-P-N
CONNECTED IN
PHASE WITH TO<J>
I
P-N-P N
EMITTER
O
PROVIDE CORRECT TOTAL
VOLTAGE FOR TEST

m) MERIT TESTING of OB2, OB3, OC3, o) TRANSISTOR TEST 2 (Beta)

& OD3 VR tubes.

MAINTENANCE
GENERAL: Included in this section are instructions for internal adjustments, trouble-shooting,
and part replacement. All internal adjustments must be performed in the order given on com-
pleted kit instruments before they can be placed in use. The same procedures will serve for
periodic readjustments in both kit and factory-wired instruments when required by component
aging or replacement.

REMOVAL FROM CABINET: To remove the instrument from the cabinet, first disconnect it
from the power line and remove the 14 screws around the edges of the panel which fasten it to
the flanges of the cabinet. As all components are assembled to the panel, removal consists
simply of lifting the panel out of the cabinet.

WARNING: The operator is exposed to voltages as high as 300 volts A-C when the instru-
ment is being operated outside of its cabinet. Take caution to avoid personal
contact with these voltages

INTERNAL ADJUSTMENTS: a) Disassemble the panel from the cabinetand lift the instrument
out. b) With the instrument in its normal operating position and no power applied, adjust the
reading of the meter pointer to zero by turning the mechanical adjustment screw on the meter
face, c) Connect an a-c voltmeter of any type across the 0-130V taps of the power transformer

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 6 67
"
TUBE TESTER lE/CO^ '< PAGE 13

and insert the line plug into a 105-130 volts AC, 60 cps line outlet. With no tube or transistor
inserted in the test socket, and the TRANSISTOR TEST selector set at "TUBE", rotate the
LINE ADJ. control R1 until the voltmeter reads 130 volts AC. d) Depress push-switch "C” so
that it latches, and hold the metal clip on the cap lead against the panel so that it makes good
electrical contact. Adjust the internal LEAK CAL. control, R7, for full-scale deflection on
the meter (zero ohms on the leakage scale), e) Release the "C” push-switch by depressing
the RESET push-button. Now depress the LINE push-switch and hold it down (this switch does
not latch) while adjusting the LINE CAL. control, R18, for half-scale deflection (the short verti-
cal "Line Adjust" on the meter scale). This completes the calibration of the instrument.

NOTE: The LEAK CAL. control, R7, is located on the underside of the chassis near the
FILAMENT selector switch. The LINE CAL. control, R18, is also on the under-
side of the chassigvtj'near the LINE ADJ. control.
i?--

CLEANING TUBE & TRAiptSTOR SOCKET TERMINALS: After along period of time, afilm of
dirt may form on the ietSIde contact surfaces of the socket terminals
which will prevent good
contact with the inserted tube and transistor pins or leads. Spray or pour a little contact cleaner
through the socket terminals, if this condition occurs, to remove the dirt film andrestore good
contact surfaces.

FUSE REPLACEMENT: A fuse in series with the primary winding of the power transformer
protects the tube tester against damage due to overloading. Do not replace a blown fuse until
you have located and corrected the cause of the failure, which can be any one of the following:
a) incorrectly set controls; b) voltage applied to shorted elements; c) a short developed with-
in the circuit of the tube tester. In the last case, it will be necessary to use the schematic diagram
to locate andremedythe source of trouble. Note that the fuse is a type 3AG 1 ampere and thatis
mounted in a fuse clip on the side of the bracket supporting the power transformer. Do notuse
a higher ampere rating fuse type for replacement.

ROLL CHART MECHANISM: a) Springs: A small spring inside the roll chart mounting bracket
provides a small tension against the bottom of one gear wheel to hold the rollchartin any posi-
tion to which it is set. Excessive tension will impede fast rotation of the wheels when seeking
tube information, and insufficient tension will result in a tendency of the roll chart to move
from the set position. If necessary, reset the spring to provide the slight tension against the
wheel required for satisfactory operation, b) Center shaft clips: There are speed-nut clips
on either end of both center shafts that press against the outer wheel surfaces and hold the
tube-and-wheels assemblies together. If these clips slip out of the shaft, the assemblies will
become loose. Should this occur, it will be necessary to unscrew the bracket from the panel
and remove the roller assemblies. Then press the clips against the outer wheel faces.

AVAILABILITY OF NEW TUBE & TRANSISTOR TEST DATA

ROLL CHARTS AND SUPPLEMENTS
As new tube and transistor types are released, an adequate number of samples of each
type are carefully tested and rated in the EICO laboratories to establish the correct control
settings for testing with the Model 667.

Periodically, new roll charts will be made available that include these new settings. With
each new roll chart, a cumulative supplement of testing information on obsolete and rarely used
types will also be supplied. When necessary, interim supplements of new testing information
may also be made available.

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 PAGE 14 <<<««<« L
-}EICO l- 667
] TUBE TESTER

NOTE: By and returning toEICOthe registration card included with each instru-
filling out
ment, the owner can be assured of notification when new charts and supplements
are made available.

U SING INTERIM SUPPLEMENT OF NEW TUBE INFORMATION

The new testing information contained in interim supplements, which may be available from
time to time, can be easily entered on the roll chart in current use as follows: a) Rotate the
wheel to the blank space left on the roll chart for this purpose; b) Lift the plastic window out
of the panel. (It snaps out of place); c) Enter the new data on the roll according to the headings
lettered on the panel; d) Carefully check to see that you have made the entries correctly;
e) Push the plastic window back into the panel again. It will snap into place.

ROLL CHART REPLACEMENT

Any new roll chart will include new testing data from previous interim supplements plus
any additional testing data obtained up to the time of publication; all new types will appear in
their proper positions on the new roll chart.

TAPE ALONG
THIS EDGE

ROLL CHART
(NOTE ORIENTATION
OF CHART)

ROLL CHART
BRACKET

NO.6-32
TINNERMAN NUTS

ROLLER

ROD GEAR

FRONT PANEL

NO.6-32 SCREW

ROLL CHART ASSEMBLY

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 667 TUBE TESTER *
7 E/CO < PAGE 15

To install the roll chart, unfasten and lift out the panel assembly (the entire instrument)
release both rollers and remove the rollers from the bracket. Install the new chart as follows:
a) Fasten the top end of the chart to one roller with good quality adhesive tape. The printed
surface of the chart must face away from the roller; b) Wind the chart onto the roller carefully,
being certain that it does not wrinkle or bind on the side wheels; d) Place the other roller
under the one on which the chart is wound so that adjacent gears mesh — then pass the bottom
end of the chart through the opening between the rollers and fasten it to the surface of the lower
roller with another piece of adhesive tape (pull the chart tight onto the lower roller when you
fasten the end to it); e) Insert the pair of rollers in the roll chart bracket with the full roll
toward the open side, which when mounted is closest to the panel; f) Mount the bracket on the
front panel with the four screws which were removed at the beginning of the replacement steps;
g) Finally, check to see that the bracket has been mounted so that the printing on the chart
reads right side up and that turning the wheels to roll the chart through its entire length does
not reveal any binding on the wheels or the chart paper.

SPECIAL APPLICATIONS

CHECKING PILOT LAMPS AND CHRISTMAS TREE LAMPS

In the center of the NOVAR socket is a receptacle for miniature-base lamps. It is suitable
for either screw or bayonet base types, since both have center contacts on the end of the base
and shells around the side of the base to serve as the other contact. As the wall around the
receptacle is grounded and the center contact of the receptacle is connected to the rotor of the
FILAMENT selector switch, whatever filament voltage is selected will be applied to a miniature -
base lamp inserted in the receptacle for testing. The test procedure, therefore, is the following:
a) Set the FILAMENT selector to the rated voltage of the lamp; b) Depress the LINE button and
turn the LINE ADJ. potentiometer until the meter reads at the LINE ADJ. mark on the scale;
c) Insert the lamp in the test receptacle. A good lamp will light to its normal intensity.
DEVELOPING SETTINGS FOR NEW TUBES
Paragraphs a through k cover the procedure for all single triodes and pentodes. Paragraph
I gives the procedure for half-wave rectifiers, and paragraph m
the procedure for light-duty
detecting diodes (usually in the same envelope with a triode or~pentode). Paragraph ~
n deals
with testing dual-triodes, triode -pentodes, and full-wave rectifiers.

a) Set the TRANSISTOR TEST selector to '’TUBE".

b) Set the FILAMENT selector switch to the required filament voltage. For center-
tapped heaters, use the series connection with the higher filament voltage (see step c).

c) Set lever switches 1 through 12 and C to positions which will connect the proper
source of voltage to each tube element. Levers 1 through 12 set the connections
for base pins 1 through 12 respectively, and lever C sets the connection for the cap
lead. The positions of the switches are as follows: 1 is ground; 2 is filament; 3 is
screen or optional plate; 4 is plate; 5 is control grid; and 6 is open (no connection).
The following rules must be observed: 1) One side of the filament must be grounded;
filament taps must be connected to position 6; 2) For tubes having several pins
connected to the same element, connect only one of these pins to the appropriate
voltage (or ground, in the case of a cathode); all other suchpins must be connected

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 PAGE 16 «««««« l
~iEICQL 6671 TUBE TESTER

to position 6; 3) Connect all unused pins and internal shields to position 1 (ground)
unless otherwise specified by the manufacturer; 4) All detecting diode plates (such
as in the 6SQ7) must be connected to position 6; 5) For tubes having a maximum
allowable DC plate voltage less than 70 volts, position 3 must be used for the plate.

d) Insert the tube in the socket and allow it to heat up. Make the line adjustments in
the usual manner. Then determine the push-buttons to be pressed in the leakage
tests by consulting the base diagram of the tube and selecting the pin numbers which
correspond to the elements. If the tube has an indirectly heated cathode, note which
pin number is the cathode (for heater -cathode leakage testing;. The pin numbers
so determined correspond to the numbers of the push-button switches to press for
the leakage tests. Enter the numbers of these push-buttons in the LEAK column of
the roll chart, underlining the cathode button. It may be convenient to refer to a
similar tube type in making these settings.

e) Ifthe leakage tests described above show the tube satisfactory, proceed with the
MERIT test procedure. If the leakage test results are unsatisfactory, do not
proceed with further testing on the faulty tube, or the tube tester may be damaged.

f) Refer to the base diagram for the tube and determine the pin number for the plate.
This push-button number should then be listed in the MERIT column and should
correspond to the lever which you had set to position 4 (step c above). Press this
button, remembering that this constitutes a plate-to-all leakage test until the MERIT
lever is pulled down.

g) Refer to the published characteristics of the tube to find the maximum allowable
plate current, or the highest typical operating current listed. Locate this plate
current in one of the charts 1-5. Read the corresponding settings of the PLATE
control and the chart number. Set lever S to the chart number, and the PLATE
control to the value as read from the chart. Doing so establishes that the meter
will read 100 on the scale when the plate current of the tube is equal to the desired
value.

h) Consult the published tube characteristics again and find the maximum allowable
dc plate voltage. Note that lever Vapplies 45 volts atpositionl, 90 volts atposition
2, and 180 volts at positions 3 and 4 (all in volts rms, 60cps). The highest position
of the V lever that may be used is the one at which the rms plate voltage applied
does not exceed roughly two-thirds of the maximum rated dc plate voltage.

i) Set lever V at position 1 and the GRID control at 7. Hold down the MERIT lever
and note the meter indication. Increase the GRID control until a meter indication
of 100 is obtained. If this is not possible, release the MERIT lever, return the
GRID control' to 7, and advance the V lever to position 2. Again hold down the
MERIT lever and adjust the GRID control for a meter indication of 100. Continue
this procedure, setting lever V to positions 3 or 4, if necessary, to obtain the 100
meter indication. If the GRID control appears to "saturate", that is, if an increase
in its setting causes very little increase in the meter indication, lever V should be
advanced to the next position. Be careful not to exceed the maximum allowable
plate voltage when making this setting. For the new 12 volt automobile radio types
(30 volts dc maximum plate voltage), set the plate element lever to position lonly.
When the correct V lever and GRID control settings are found, release the MERIT
lever and remove the tube from the tester.

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 667 TUBE TESTER "lEICQL, »< PAGE 17

20 40 60 80
"PLATE" CONTROL SETTING “PLATE" CONTROL SETTING

2.

NOTES: 1. These charts show the actual tube (plate or screen) currents drawn when the
meter reads 100 on the 0-140 scale. For any other meter readings, multiply
the indicated currents (from the appropriate chart) by the fraction X/100, when
X is the actual meter indication*
Chart 1 is used when the "S" lever is set at position 1, chart 2 is for position
2.chart 3 is for position 3, chart 4 is for position 4, and chart 5 is used for
positions 5 and 6.

3. These charts are to be used for "MERIT" testing of tubes only; they do not
apply for line adjustment, leakage, or transistor tests.

4. Normally, only plate currents are measured. However, screen currents can
be checked in the same manner by depressing the push-button corresponding to
the pin number of the screen (substitute this number for the one shown in the
MERIT column of the roll chart). Then pull back on the MERIT lever and read
as above.

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 PAGE 18 «««««« L
]E/CO l-1 667 TUBE TESTER

"PLATE" CONTROL SETTING

j) Obtain the GRID control settings that give a reading of 100 on the meter for several
other tubes of the identical type and establish an average setting.

k) Record the final settings of all controls under the proper column headings on the
roll chart. The settings so obtained will permit you to test other tubes of this type
until information is obtained from EICO on a new roll chart or supplement. Note
that the settings you obtain may differ from the settings obtained using standardized
or "bogie" tubes.

l) For a power rectifier, the procedure for obtaining MERIT test settings is the same
up to step h). (The S lever and the PLATE control are set as usual to cause a meter
reading of 100 on the 0-140 scale when maximum allowable plate current is drawn.
The GRID control is set at zero to actuate the switch which inserts the 4000 current-
limiting resistor. The V lever is set to position 1 and the MERIT lever held down
while the meter is read. If the reading is substantially below 100, move the V
lever to position 2, providing the voltage rating of the tube is not exceeded. If the
reading is still substantially below 100 move the V lever to position 3, again pro-
viding that the voltage rating of the tube is not exceeded. If and when you come to
a position of the V lever for which the meter reading does appreciably exceed 100,
return the V lever to the next lower position and adjust the PLATE control for a
meter reading of 100. If this does not occur even at V lever position 3 (the same
plate voltage is applied at position 4), adjust the PLATE control for a meter reading
of 100 at this position; the current drawn will normally be sufficient for a good test.
Completion of the procedure is covered in steps j and k above, except that instead
of finding an average GRID control setting (step j), find an average PLATE control
setting.

m) For light-duty detecting diodes, such as are normally included in the same envelope
with a triode or pentode, MERIT test settings should be obtained after developing
the settings for the triode or pentode section. As instructed earlier, the diode plate
levers are set to position 6 (which position they retain for the triode or pentode
test. It will therefore normally not be necessary to reset levers 1 through 12 & C
when going from the triode or pentode test to the diode(s) test(s). The S lever is
always set at position 6 and the preliminary PLATE control setting determined by

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 entering chart
‘
667 TUBE TESTER lE/CO*-, < PAGE 19

5 at the maximum allowable diode plate current and reading off the
corresponding PLATE control setting. The GRID control remains at the setting
previously developed for thetriode or pentode section (if any) in the same envelope.
(Actually the GRID control setting has no effect in this test provided that it is set
above7; itisleftat the previously developed setting to avoid unnecessary re-setting.
The V lever is set first at position land the meter reading observed with the MERIT
lever held down. Note that the voltage applied to the diode in this test is the grid
voltage selected by the V lever; namely 5 volts at position 1, 15 volts atpositions 2
and 3, and 45 volts at position 4 (all in volts rms, 60 cps). Refer to these voltages
to determine whether the maximum voltage that can be applied to the diode is
exceeded at any V lever position. If the meter reading at the V lever position 1 is
substantially less than 100 on the 0-140 scale, proceed to positions 2 and 4 succes-
sively (position 3 is identical to 2 as regards grid voltage) if need be, observing
the limitation of maximum allowable applied voltage. If and when you come to a
position of the V lever for which the meter reading does appreciably exceed 100,
return the V lever to the next lower position and adjust the PLATE control for a
meter reading of 100. If this does not occur even at V lever position 4, adjust the
PLATE control for a meter reading of 100 at this position; the current drawn will
normally be sufficient for a good test. Completion of the procedure is covered in
steps j and k above, except that instead of finding an average GRID control setting
(step j), find an average PLATE control setting.

n) The foregoing applies only to single triodes, pentodes,

light-duty diodes included
in the same envelope with a triode or pentode, and half-wave rectifiers. For dual
triodes or triode-pentodes, both sections of the tubes should have the correct opera-
ting voltages applies simultaneously. For a triode-pentode, connect the triode
plate lever to position 3, the pentode plate lever to position 4, and the pentode
screen lever to position 3; both control grid levers may be set at position 5. Refer
to the roll chart settings for the 6U8 and 12AU7 for this type of operation. In the
case of full-wave rectifiers, only the section under test has the operating voltage
applied. Refer to the roll chart settings for the5U4as atypical full-wave rectifier.

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 REPLACEMENT PARTS LIST FOR 667

SYM.# STOCK # AM'T. DESCRIPTION

Cl 23010 1 capacitor, elec., 10mf-150V

C2 23001 1 capacitor, elec. , 10mf-25V
CR1 93003 1 rectifier, 50ma
CR2 95000 1 rectifier, diode
FI 91002 1 fuse, 1 amp
11 92006 1 pilot lamp
Ml 72015 1 meter, 200ua, 1K£2
Rl 19012 1 potentiometer, WW, 200«, 25W, w/SPST
R2 10406 1 resistor, 680J2, 1/2W, 10%
R3 11026 1 resistor, 200K, 1/2W, 1%
R4 10432 1 resistor, IK, 1/2W, 10%
R5 11062 1 resistor, 1290, 1/2W, 1%
R6 11061 1 resistor, 500, 1/2W, 1%
R7 18023 1 potentiometer, 100K, (LEAKAGE CAL.
R8 10544 1 resistor, 270K, 1/2W, 5%
R9 19010 1 potentiometer, 3K, 4W, 5%
R10 11056 1 resistor, 683W, 1/2W, 1%
Rll 11057 1 resistor, 17 10, 1/2W, 1%
R12 11058 1 resistor, 42. 70, 1/2W, 1%
R13 11059 1 resistor, 10.70, 1/2W, 1%
R14 11060 1 resistor, 3. 57 SI, 1/2W, 1%
R15 10774 1 resistor, 24K, 1W, 5%
R16 19011 1 potentiometer, 5K, 4W, 5% w/SPST
R17 14504 1 resistor, 4000, 5W, 10%
R18 18023 1 potentiometer, 100K, (LINE CAL.
R19 10544 1 resistor, 270K, 1/2W, 5%
R20 14505 1 resistor, 3K, 5W, 10%
SA1 65006 1 switch assembly, push button (S1-S14)
SA2 65005 1 switch assembly, lever (S15-S29)
S30 60042 1 switch, rotary 22 pos. (FILAMENT)
S31 1

60046 1 switch, rotary, 5 pos. (TRANSISTOR)

S32 switch, (part of Rl) (AC -OFF)
S33 64001 1 switch, push button (LINE)
S34 63000 1 switch, lever (MERIT)
S35 switch (part of R16)
T1 30017 1 power transformer
XF1 97802 1 fuseholder
XII 97709 1 pilot lite assemble
XTRl 97043 1 socket, transistor
XVI 97029 1 socket, 7 pin sub- miniature
XV2 97072 1 socket, 5 pin NUVISTOR
XV3 97073 1 socket, 7 pin NUVISTOR
XV4 97024 1 socket, 7 pin miniature
XV5 97030 1 socket, 8 pin sub -miniature
XV6 97068 1 socket, 10 pin
XV7 97003 1 socket, OCTAL
'78 97074 1 socket, NOVAR w/bulb socket
XV9 ;
97064 1 socket, 12 pin COMPACTRON
::mo ^

97001 1 socket, LOCTAL

40000 22 nut, hex, No. 6-32
40001 6 nut, hex, 3/8”
40004 2 nut, hex, No. 2-56

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 STOCK# AM’T. DESCRIPTION
40007 6 nut, hex, No. 4-40
40016 1 nut, hex, 1/2"
40017 8 nut, Tinnerman, No. 8
40019 4 nut, Tinnerman, No. 6
40021 4 clip, Tinnerman, push on
40023 1 nut, push on (8 pin sub- miniature)
40024 1 nut, push on (7 pin sub- miniature)
41003 8 screw, No. 8-32 x 3/8
41035 14 screw, No. 6-32 x 1/4 self-tapping
41086 20 screw, No. 6-32 x 5/16
41089 1 screw, No. 6-32 x 3/16 Rd. Hd.
41090 8 screw, No. 4-40 x 5/16
41106 2 screw, No. 2-56 x 3/8
42001 5 washer, flat, 3/8"
42002 26 washer, lock, No. 6
42007 6 washer, lock, No. 4
42029 1 washer, rubber, 1/2"
42053 2 washer, lock, No. 2
46001 1 grommet, rubber, 1/4"
53011 5 knob, control, round bar
53012 15 knob, push, black
53013 1 knob, push, red
53072 16 knob, lever type, black
57000 1 linecord, black
80139 1 panel
81081 1 bracket, transformer
81083 1 bracket, roll chart
81959 1 bracket, left
81960 1 bracket, right
82101 1 strain relief
87002 1 handle, plastic folding
88028 1 cabinet
88029 1 cover
89726 1 roll chart
89565 4 gear, roll chart drive
89566 2 roller, roll chart drive
89567 2 rod, roll chart drive
89568 1 damper, roll chart drive
89569 2 window, plastic
98501 1 cap, grid, black, insulated
89727 1 supplement, roll chart
66120 1 Instruction Manual
66367 1 Construction Manual (Steps & Figures)

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 XVI

TO

XVI

SOCKETS

TUBE

ON

PINS

CORRESPONDING

TO

SCHEMATIC FOR 667

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 m
&

w EICO
Service Policy
K£f

6S
isae^iss?:^SM3^slM:^Bi(^:i»^aiES«sSsls3S

PARTS REPLACEMENT
If it appears that a component is defective, and of EICO. However, if the terms and conditions of the
you desire a replacement, contact your nearest EICO warranty are violated there will be a charge for labor
Authorized Service Agency or our Customer Service plus parts.
Department.
In all cases,the unit must be sent to the factory
you
If claiming the right to a no -charge re-
are or service agency transportation prepaid, and the unit
placement under the terms and conditions of the will be returned to the customer transportation collect.
warranty, it is required that you shall have sent in
the registration card within 10 days of the date of On kits, the services rendered for the minimum
purchase, and that you send back the defective part labor and handling fee are the correction of any minor
transportation prepaid. In claiming warranty service wiring errors (not extensive corrections or rewiring),
or parts, please send or show your original sales slip the labor involved in replacing defective parts, and
plus the IBM card from the carton EICO or its autho-
.
any adjustments, alignment, or calibration procedures
rized agency will make the necessary replacement at that would normally be performed on a factory -wired
no charge for parts eligible under the terms and con- unit. Units not wired according to instructions, or
ditions of the warranty. In returning tubes, pack them modified in any way, or showing evidence of the use
of acid core solder, will not be serviced and will be
very carefully to avoid breakage in shipment. Broken
tubes will not be replaced. Please read the warranty returned to the customer forthwith.
on the subject of parts eligible for replacement.
Further information required on a part returned for SEE OUR SCHEDULE OF SERVICE CHARGES
a no -charge replacement under the terms and condi-
tions of the warranty is as follows: Units requiring extensive corrections or rewiring
will incur an additional labor charge. An advance
a) Model number and serial number, if any, of estimate will be submitted.
unit Also any code numbers in red under the
. Please note: minimum labor and handling fees and
words INSTRUCTION MANUAL on the cover service charges are subject to revision at any time.
of the book supplied with the unit.
LOCAL REPAIR FACILITIES
b) Stock number and description of part as
given on the parts list* If the part is not
A list of authorized service stations is provided
means with this manual. The roster of stations may change
listed (of Itself) in the parts list, it
from time to time, and if considerable time has
that the part is integral with a sub-assembly,
elapsed since youpurchased your unit, you are advised
which we consider replaceable only as an to contact the station you choose before sending the
entity. Parts integral with a sob-assembly unit to -them for repair. Use of a local service station
may be listed in the parts list, so identified. will often result in faster service, and, usually, lower
If we consider that some or all of the parts transportation costs.
may be individually replaced In the field It is necessary that you comply with the Shipping
under appropriate circumstances. If your Instructions that follow when sending in a unit for
unit is out of warranty, you are generally service.
advised to order a replacement sub-assem-
SHIPPING INSTRUCTIONS
bly.

c) Describe as completely as possible the You are strongly advised to retain the original
nature of the defect, or reason for requiring shipping carton and inserts should re shipment be re-
replacement. quired for service or any other purpose. The carton
may be collapsed for storage in as small a space as
possible. In very many cases, the same carton is
used for kit and factory -wired units so that the kit
carton will serve for reshipment of the completed kit.
REPAIR SERVICE
When sending a unit for service pack the unit very
carefully, preferably in the original shipping carton
EICO maintains a national network of authorized
with the original inserts.
service agencies for in -warranty or out -of -warranty
repair of EICO equipment. It is intended to serve If this is notpossible, use a strong oversize carton,
those customers who are not sufficiently familiar with preferably wood, and using at least 3 inches of resili-
electronics to make use of the EICO Service Consul- ent packing material such as shredded paper or excel-
tation facilities, or whose difficulties cannot be solved sior inserted between all sides of the unit and the
by correspondence. carton. Seal the carton with strong gummed paper
tape or strong twine or both. Attach a tag to the
For all out-of -warranty units, there is a minimum
instrument on which is printed your name and address
labor and handling fee. Charges for parts replaced
and brief reference to the trouble experienced. Affix
are additional to the minimum fee.
"FRAGILE” or "HANDLE WITH CARE" labels to at
For completed kit units, there is a
in -warranty least four sides of the carton or print these words*
minimum labor and handling fee. There is no charge large and clear with a bright color crayon. Ship pre-
for a replaced defective part provided that the terms paid.
and conditions of the warranty for no charge replace -
Include your name and address on the outside of
ment are not violated in the judgement of EICO.
the carton. Return shipment will be made transporta-
For in -warranty factory- wired units, there is no tion charges collect. Note that a carrier cannot be
charge for labor or parts if the unit complies with the held liable for damage in transit, if packing, IN HIS
terms and conditions of the warranty in the judgement OPINION, is insufficient.

EICO 131-01 39th Avenue, Flushing, New York 11352 LE. 1371

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 MINIMUM LABOR AND HANDLING FEES
AF4 .$ 7.50 488 5.00
THE EICO WARRANTY RA6 5.00 495 5.00
HF12 7.50 526 5.00
The Electronic InstrumenfCompany, Inc. hereafter ,
HF14 5.00 536 5.00
referred to as EICO, warrants that, for a period of 90 HF20 . 10.00 540 5.00
days from the date of purchase, any EICO kit will be HF22 5.00 555 5.00
free of defects in parts, and that any EICO factory - HF30 5.00 556 5.00
wired unit will be free of defects in parts and work- HF32 9.50 565 5.00
manship. For an EICO kit, EICO's obligation is HF35 5.00 566 5.00
li mited to those parts which are returned transportation
ST40 . . . 15.00 584 5.00
prepaid to the factory or authorized service agency HF50 5.00 610 5.00
without further damage, and in the judgement of EICO HF52 612
10.00 5.00
are either originally defective or have become defec-
HF60 5.00 625 6.00
tive in normal use. EICO's obligation does not in- HF61 628 7.00
6.00
clude any labor required to locate trouble in or repair HF61A 630
6.00 5.00
a kit. For an EICO factory -wired unit, EICO's obli- HF65 632
6.50 7.00
gation is limited to replacement or repair, at EICO's HF65A '
. 6.50 666 10.00
option, of those parts, sections, or entire units re-
ST70 15.00 667 10.00
turned transportation prepaid to the factory or autho - HF81 13.50 680 6.00
rized service agency without further damage, and in
ST84 10.00 706 5.00
the judgement of EICO are either originally defective
HF85 8,00 710 5.00
or have become defective in normal use.
HF86 9.00 720 13.50
The warranty does not apply any parts damaged
to HF87 9.00 722 9.00
in the course of handling, assembling, or wiring by HF89 9.00 723 7.50
the customer, or damaged due to abnormal usage or HFT90 7.50 730 7.50
in violation of instructions or reasonable practice, or HFT92 9.00 740 9.00
further damaged to a consequential degree in return HFT94 7.50 760 9.00
shipment. Furthermore, the foregoing warranty is ST96 13.50 761 9.00
made only to the original customer, and is and shall ST97 13.50 762 9.00
be in lieu of all other warranties, whether expressed MX99 7.50 770 12.00
RP100* * 771-2 12.00
or implied, and of all other obligations or liabilities
on the part of EICO, and in no event shall EICO be 111 20.00
liable for any anticipated profits, consequential 145 5.00 803 5.00
damages, loss of time, or other losses incurred by 145A 5.00 944 5.00
the customer in connection with the purchase or 147 5.00 950 5.00
operation of EICO products or components thereof 214 6.00 955 6.00
221 6.00 965 15.00
The registration card, which accompanies each 5.00
222 7.00 1020
EICO kit or factory -wired unit, must be filled in and 232 6.00 1050 5.00
returned to the company within 10 days after the date 249 6.00 1055 5.00
of purchase. This warranty applies only to registered
250 7.00 1060 5.00
units
255 7.00 1064 6.00
260 7.00 1073 5.00
315 .. 6.00 1078 5.00
320 5.00 1100 5.00
SCHEDULE OF SERVICE CHARGES 322 5.00 1120 5.00
1. Same prices for wired units or completed kits. 324 5.00 1140 5.00
2. Charges are based on the schedule of minimum charges 352 5.00 1171 5.00
above. Some exceptions are noted below. 360 5.00 1180 5.00
3. If the published rate is $ 5.00-$ 6.00, this covers up to 368 12.50 2036 13.50
1 hour of labor time (minimum $5. 00). 369 12.50 2050 13.50
If the published rate is $ 6.50-$ 8.00, this covers up to 377 6.00 2080 13.50
1^ hours 425 6.00 2200 10.00
If the published rate is $ 9.00-$10.00, this covers up to 427 12.50 2400* *
2 hours. 430 12.50 2510 12.00
If the published rate is $11. 00-$14. 50, this covers up to 435 15.00 2536 17.50
2^ hours.. 460 15.00 2715/16 10.00
If the published rate is $15. 00-$20. 00, this covers up to 470 . 15.00 3566 25.00
3^ hours
4. Time required in excess of these minimum charges is
calculated at $5.00 per hour. * Model RP100 and Model 2400 will be billed on the
5. Above prices are for labor only. Parts are additional.
basis of $10.00 for the first hour and $5.00 each
6. Miscellaneous prices not published in manuals are:
additional hour, with a maximum unauthorized repair
frobes - $2.00 RP-100 Playback amp. only or
of $50. 00 for the kit and $25. 00 for a wired unit.
CRA & CRU -$3.00 Power Supply only
or Record amp. only .$5.00
. .

2536 Printed Circuit Board - $5.00.

7 . ESTIMATES An estimate for repairs will be given
:

before repairs are made where repairs will exceed

stated minimum charges. If you choose not to have
your unit repaired, a charge of $3.00 for estimating
time will be made.

8. All prices are subject to change without notice.

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 EICO ELECTRONIC INSTRUMENT CO. ,
INC.
131-01 39th Ave. ,
Flushing, N. Y. 11352 Effective 9/30/64

AUTHORIZED WARRANTY SERVICE AGENCIES

ALABAMA FLORIDA MARYLAND

Hueytown Miami Baltimore
Electro -Mechanical Assoc. Southern Authorized Factory Service Clayton Electronics, Inc.
3182 Warrior River Rd. 62 N.W. 27th Ave. 4723 Gwynn Oak Ave.

Mobile North Miami Beach Bethesda

Arnold’s TV Service Southeastern Communications, Inc. American Technical & Service
1259 Eslava Drive 2055 N.E. 151st St. 4961 Bethesda Ave.

ARIZONA West Palm Beach MASSACHUSETTS

Phoenix Northwood TV & Service Co. Boston
Sigma Electronics 2317 North Dixie Park Armature Co.
602 N. 3d St. 1218-30 Columbus Ave.
IDAHO
Tucson Twin Falls Medford
Park Music Shop TV Tuner Service Electron TV & Hi-Fi
1702 E. Speedway P.O. Box 793 229 Salem St.

CALIFORNIA ILLINOIS MICHIGAN

Anaheim Chicago Detroit
United Sound & TV Co. B& S Electronics, Inc. The Audio Clinic
2010 W. Lincoln Ave. 6326 W. Roosevelt Rd. 17125 W. McNichols

Los Angeles Electronic Engineers, Inc.

5615 W. Division St.
MINNESOTA
Electronic Instrument Service
Minneapolis
8907 So. Vermont Ave.
Andersen Audio Laboratory
INDIANA
4145 Minnehaha Ave. South
United Sound & TV Co. Indianapolis
5036 Venice Blvd. Aid TV &
General Appliance
4145 North College Ave.
MISSOURI
Kansas City
San Mateo
Carroll Electronics
Electro Service Co. La Grange
2410 Grand Ave.
240 Main St. Westview Electronics
R.R. 4
San Francisco
Kansas City Calibration Lab.
4034 Broadway
Prompt Radio & TV Co. KANSAS
(Instruments Only)
3143 Mission St. Wichita
(Hi-Fi & Tape Recorders only) Alan Appliance Service, Inc.
St. Louis
339 North Main St.
Scherrer Instruments
COLORADO
5449 Delmar Blvd.
Denver KENTUCKY
A. B. & K. Service, Inc. Louisville
1459 South Pearl St. Maury’s Fluorescent & Appl. Service
A. A. Kelley Radio & Elect. Service
4181 Manchester
962 South 3d St.
CONNECTICUT
Norwich LOUISIANA
NEW JERSEY
Irvington
The La Course Radio Electric New Orleans
Service Audio Service Labs
184 Franklin St. Industrial Inst. Works
1422 Springfield Ave.
3305 Tchoupitoulas St.
Windsor
Hickory Electronics Co. Inc. MAINE Riverside
,

21 Maple Ave.
Lou’s Electronic Service
South Portland
727 Baylor St
Air-Tronics
DISTRICT OF COLUMBIA Port O'Maine Airport
Washington Pleasant Hill Rd.
Sylvan Radio & TV Co.
306 Kennedy St. , N. W.

I.E. 1372 EICO Electronic Instrument Co. , Inc., 131-01 39th Ave. Flushing, N.Y. 11352

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 NEW MEXICO Raleigh Woodlyn
Alburquerque Speed Instrument Co. Altron Electronics Co.
Ed’s TV & Hi-Fi 3028 E. Rothgeb Dr. 1309 Jefferson Ave.
301 Maple Ave. N. E. (For Instruments Only)
SOUTH CAROLINA
NEW YORK Winston-Salem Cayce
Binghamton Electronic Services Cayce Radio- TV, Appliances, Inc.
Ross’ Radio & TV Service 150 Woodrow Ave. 906 Knox Abbott Dr.
116 Main St.

OHIO TEXAS
Hastings on the Hudson Cleveland Abilene
Central T. V. Hi-Fi Service Vol’s Repair Shop
Bob Whitlow Radio & TV
543 Warburton Ave. 13914 St. Clair Ave. 1417 Marshall

Huntington Station Dayton El Paso

Suffolk Sound Repair, Inc. Far Hills Service Center Test Equipment Co.
1671 New York Ave. 45 W. Whipp Rd. 5319 Harlan Dr.

New Hyde Park Toledo La Feria

Ethical Electronic Service Dave’s Radio & TV La Feria Radio & TV Service
3330 Hillside Ave. 3112 Upton at W. Central
Wichita Falls
New York City OKLAHOMA Ken Dixon Radio & TV
Oklahoma City 2612 Grant St.
Brooklyn Audio Specialties
Marveltone Recording Service 1010 North Virginia UTAH
1168 Flatbush Ave. Bountiful
OREGON Anderton Electronic Lab.
Manhattan Portland 129 E. 1800 South
Marveltone Recording Service Hunter’s Video Sonic
i05W. 72nd St. 4059 N. E. Sandy Blvd. VIRGINIA
Arlington
Winters Radio Laboratory
1

PENNSYLVANIA Washington Electronic Service Co.

11 Warren St.
122 South Wayne St.
College ville
Queens Central Communications
170 First Ave. Norfolk
H&E Clock and Elect. Corp. Dixie TV Service
144-33 Jamaica Ave.
Havertown 1107 W. Little Creek Rd.

Schenectady Michael’s TV & Radio Service

1127 West Chester Pike WASHINGTON
Wide Enterprises, Inc. Seattle
612 Union St.
Lehighton Ron Merritt Co.
Lehighton Electronics 1320 Prospect St.
Vestal
P. O. Box 281
Compton Industries, Inc. CANADA
333 Vestal P’kway East Toronto , Ontario
Philadelphia
Electronic Servicenter John R. Tilton, Ltd.
West Hempstead 51 McCormack St.
13 S. 21st St.
Audotronic, Inc.
96 Hempstead Turnpike Vancouver
Sunshine Scientific
1810 Grant Ave. National TV Service Co. , Ltd.
NORTH CAROLINA (Instruments only) 2145 Commercial Drive
Charlotte
Tryon Repair Service
3125 Tuckasegee Rd.

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