—PRODUCT INFORMATION— Page 111-67 Sharp-Cutoff Pentode TUBES FOR TV VIDEO AMPLIFIER APPLICATIONS @ COLOR TV TYPE © FRAME-GRID CONSTRUCTION = @9-PIN MINIATURE @ 21000 MICROMHOS ‘The 12HL7 is a miniature tube containing a frase-grid, sharp-cutoff pentode designed primarily for video anplifier service in color television receivers. GENERAL ELECTRICAL Cathode = Coated Untpotenttal Porallel Parallel Sections, Heater Characteriatics and Ravings Sections, Sections Circuit + Circuit 5 eater Voltage AC or BEL 6.30.68 votes Meter currents it Ole aperes Direct Tnterelectroue Capecicancesti GridsMusber I to Plater (Ito D) oe 6 oe ee ee ONS oe Tour gteo(he ke grated. oti ab ke output: “peo (sks Bo g3 shade PELL D PL iii iiiee MECHANICAL Operating Position = Any Envelope’ fe6 1/2) lave Base = 29-1, Soull’ Button 9-Pin Outline Draving = BIA 6-3 Marina Diaseter ss. Le an Inches Maxim Oversail dengehs 2) DP EDP b fas recess PHYSICAL DIMENSIONS TERMINAL CONNECTIONS BASING DIAGRAM sl Pin 2 + Grid Rusber 1 ® T Hin 3! Ged fer 5 csuppressor) Qa © | — and Internal Shiela aK Pin 4 = Heater jo) RDS ZAeSE @ (7) aes | ovoq | | aye Bin? Place hid aortas the Pin 8 = Geld Number 2 (Screen) " sete Fin 9 - Grld umber 3 (Suppressor) nd Tovernat Shiela 0} 5) BIA oP 47 BIA 6-3 GENERAL @@ ELECTRIC12HL7 Page 2 17 DESIGN- Pe XIMUA VALUES Plate Voltage. Seca Screen Supply Voltage - Screen Voltage - See Screen Reting Chart” Positive DC Grid-Nusber 1 Voltage... + + - Plate Dissipation». + ee es tee Screen Dissipation. » >. 7 + ts tte Heater-Cathode Voltage Heater Positive with Respect to Cathode DC Component... ee 2 ee ee Total Do and Peak 2 sf te Heater Negative with Respect to Cathode Total Do and Peak ys + ee ee ee Grid-Number 1 Circuit Resistance With Fixed Blas... eee ee With Cathode Blas 2 1 1 ft cond environmental conditions applicable to « bogey electron tube of a specified type as defined by its published dato and should not be exceeded under the worst probable conditions, The tube manufacturer chooses there values to provide ‘acceptable serviceability of the tube, making allowance for the effects of changes in operating conditions due to vor: ions in the choracteristis of the tube under consideration. MAXIMUM RATINGS Pee ECE aC COREE Vol cel 5 5 Do. 1 2330 volts : 7 : + 0§§ Volts Pa bb bl ff 10 watts Toll Tao wacte cee ee eee + 100 Volts Pi bli bf ff f200 votes be ee ee 4 200 Volts 5 : + 4 + 40.1 Megohns Pib DoD lf fff 025 megotns ‘The equipment manufacturer should design so that initially fond throughout life no design-maximum value for the intended service is exceeded with a bogey tube under the worst probable operating conditions with respect to supply voltage variation, equipment component variation, equip- ment control adjustment, load variation, signal variation, environmental conditions, and variations in the choracteristes of all other electron devices in the equipment. CHARACTERISTICS AND TYPICAL OPERATION AVERAGE CHARACTERISTICS Plate Voltage. . Screen Voltage 2 2 1 2 Grid-Nuober 1 Voitage - | | . Cathode Resistor (Bypassed) Plate Resistance, approxinate Transconductance: . s+ + + 7 Plate Current.» 1. 1 5 Screen Current | | Grid-Nunber 1 Voltage, approximate Th = 100 Microamperes. - . . - + Volts Volts Volts Ohm Ohm Micromhos Milliamperes Milligaperes Volts12HL7, Page 3 67 NOTES Operated with the two sections of the heater connected in parallel and the resulting combination in series with the heaters of other tubes having the sane bogey heater current. Operated with the two sections of the heater connected in parallel and the resulting combination in parallel with the beaters of other tubes having the sane bogey heater voltage Operated with the two sections of the heater connected in series and the resulting combination in parallel with the heaters of other tubes having the sane bogey heater voltage. u Meater voltage for a bogey tube at If = 0.6 anpores. # Yor parallel heater operation, the equipment designer should design the equipment so chat heater voltage is, + 55 centered at the specified bogey value, vith heater supply variations restricted to maintain heater voltage within the specified tolerance; for series heater operation, the equipment designer should design the equip- ment 0 that beater current is centered at the specified bogey value, with heater supply variations restrict- ed to maintain heater current within the specified tolerance. Heater current of a bogey tube at Ef = 6.3 volts. Heater current of a bogey tube at Ef = 12.6 volts. The tine required for the voltage across the heater to reach 80 percent of the bogey value after applying 4 times the bogey heater voltage to a circuit consisting of the tube heater in series with a resistance equal to 3 times the bogey heater voltage divided by the bogey heater current Without external shield. Control grid to cathode spacing of this type is of such low order of magnitude as to preclude the use of voltage between these elements of more than 50 volts de or peak ac in comercial tube checkers or shorts indicating devices, particularly where vechanical excitation of the tube is employed. Applied for a short interval (two seconds maximum) so as not to damage tube. SCREEN RATING CHART 40 SCREEN DISSIPATION IN HATS ° a0 20 a0 esr SCREEN VOLTAGE 1 voLTS vacaIm miLLvamPenes AVERAGE PLATE CHARACTERISTICS IE 08 100 PLATE OUTAGE IN VOLTS AVERAGE PLATE CHARACTEI T 4 700 300 PLATE YOUTAGE IN voLTS RISTICS ae fea = 0 yours TILT [TT | SEREEN CURRENT (1212HLT AVERAGE TRANSFER CHARACTERISTICS 11-67 — vue fee foo ours | y ae | 4 | 44 neg | / ln 2 ye | i +I 0 0 7 + + A . vnvnaee cnio-novars + voutace tn vats nts ue AVERAGE TRANSFER CHARACTERISTICS y 3s 5 30 ag ne iY | we TA | / { : t f + - i Lp Tt o 0 . ¢ 7 2 ° eouneteua-s GRI0-KUNAER 1 VOLTAGE IN ¥OLTS sion