FC 347

Deluxe
Digital
Frequency
Counter
DIGITAL FREQUENCY COUNTER POWER

DIM

FC 347 MHz

The Galaxy FC 347 digital frequency counter is universal designed for use in
CB and amateur radio, it provide more exciting radio Communications.

SPECIFICATION:
Power Requirements 8 ~ 13.8V DC
Frequency Range 1 ~ 40MHz
Consumption Current 60mA
Input Impedance 5K Ohm, 20pF
Standard Oscillating Frequency 4.5MHz±10ppm
Input Voltage 100mV ~ 2Vrms
Dimension 1 1/4” (H) × 3 1/2” (W) ×3 1/4” (D)
Specification subject to change without notice.

-1-
FC 347 FREQUENCY COUNTER MAIN PCB (EPT210014C)

-2-
PART LIST:
FC 347 FREQUENCY COUNTER MAIN PCB

REFERENCE RANGER PART

ITEM DESCRIPTION
NUMBER NUMBER
1 C10 CE0161087Z E/C 1000uF 16WV Z
2 C2, C20 CEM161077Z E/C 1000uF 16WV Z H=5MM
3 U8(IC8) ENSS07805Z IC 7805
4 X1 EYCAP04500 4.500 MHz CRYSTAL
5 L1 ECCHK16096 CHOCK COIL 470uH
6 EPT210014C COUNTER PCB
7 R42 RCY010004Z CHIP/F/R 0 Ω 0.1W
8 R37 RCY014704Z CHIP/F/R 47 Ω 0.1W
9 R31 RCY013314Z CHIP/F/R 330 Ω 0.1W
10 R32 RCY011004Z CHIP/F/R 10 Ω 0.1W
11 R10, R11, R12, R13, RCY011014Z CHIP/F/R 100 Ω 0.1W
R14, R15, R16, R17,
R18, R19, R20, R21,
R22, R23, R24, R25,
R26, R27, R28, R29,
R30, R33
12 R36, R40 RCY011034Z CHIP/F/R 10K Ω 0.1W
13 R35 RCY014714Z CHIP/F/R 470 Ω 0.1W
14 R4, R5, R6, R7, R8, R9 RCY012234Z CHIP/F/R 22K Ω 0.1W
15 R41 RCY013334Z CHIP/F/R 33KΩ 0.1W
16 R2, R3 RCY014724Z CHIP/F/R 4.7K Ω 0.1W
17 C3, C5, C18 CK2104AA6U CHIP/C 0.1uF 25WV
18 C11,C12,C13,C14,C15, CK1103AB6U CHIP/C 0.01uF 50WV
C16, C17, C19
19 C9 CK1102AB7L CHIP/C 0.001uF 50WV
20 C1 (TOS~03) CK1104AB7R CHIP/C 0.1uF 50WV
21 C6 CK1330AB4A CHIP/C 33PF 50WV
22 C7 CK1150AB4A CHIP/C 15PF 50WV
23 U1 YNTA04093B IC TC4093BFN
24 U5, U6, U7 YNRO06250F IC BA6250F-TP
25 U4 YNRG0GX3SP IC LC7232N
26 VC1 CV038200AY TRIMMER/C TZC03P200A110
27 Q3 TY2SC2714Z T/R 2SC2714-TE85L
28 Q1, Q2 TY2SB0798Z T/R 2SB798DL

-3-
Harness Assembly Wiring Instruction:
(Fig. 1-2, For CB Transceiver Model Cobra 148GTL)

A DIGITAL FREQUENCY COUNTER POWER

CLAMP DIM

FC 347 MHz

ITEM PARTS NO QT’Y

Frequency Counter Galaxy FC 347 1PCS
Harness Assembly EX07N48794 1PCS
Clamp GZZZ50000Z 4PCS

CLAMP NO COLOR POSITION

1 BLACK GROUND 1 2
2 WHITE VCO O/P
3 BROWN GROUND
4 RED VCC
5 ORANGE USB B+
6 YELLOW LSB B+

CLAMP
CLAMP
6 5 3 4

-4-
Harness Assembly Wiring Instruction :
(Fig. 1-1, For Amateur Radio Model SS-3900)

A DIGITAL FREQUENCY COUNTER POWER

CLAMP DIM

FC 347 MHz

ITEM PARTS NO QT’Y

Frequency Counter Galaxy FC 347 1PCS
Harness Assembly EX07N48794 1PCS
Clamp GZZZ50000Z 3PCS

NO COLOR POSITION
1 BLACK GROUND
2 WHITE VCO O/P

12
3 BROWN GROUND
4 RED VCC +8V
5 ORANGE USB B+
6 YELLOW LSB B+
5 6
CLAMP

CLAMP 4

-5-
Connection:
1
2
3
4
5
6

NO COLOR POSITION
1 BLACK GROUND
2 WHITE VCO O/P
3 BROWN GROUND
4 RED VCC +8V
5 ORANGE USB B+
6 YELLOW LSB B+

DIGITAL FREQUENCY COUNTER POWER

For SS-3900, See the Fig.1-1
FC 347
III MHz
DIM
For Cobra 148GTL, See the Fig. 1-2

Schematic Diagram:

-6-
Troubleshooting:

Symptom:
On Galaxy models, some frequency bands read correctly but some frequency
bands seem to oscillate or roll.
Cure 1:
Recheck solder location of wire #2.
Cure 2:
Some Galaxy models have an internal adjustment coil labeled L22, which can
be adjusted to correct this problem.

Symptom: Frequency display seems to be off 1KHz to 2KHz.

Cure:
Make sure radio’s internal mixers are properly aligned and then adjust VC1
located on the FC 347 main PCB for proper frequency.

Symptom: On some Cobra models the frequency display reads 45.XXXMHz.

Cure:
Locate the two solder pads of JP1 on the main PCB of the FC 347 and solder
these two pads together with a soldering iron.

Sept. 2003
LZZZ62085A

-7-