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Preferred Substitutes ......................... 6BD4A
Source ........................................ RCA RC-29 - 1975
Source ........................................ RCA RC-29 - 1975
Glass octal type used for the voltage regulation of high-voltage, low-current dc power supplies in color and black-and-white television receivers. Requires octal socket. Socket terminals 3, 4, 6 and 8 should not be used for tie points.
Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-12
Base Type ..................................... B8-71
EIA Outline ................................... 12-36
EIA Base ...................................... 8GC
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any
Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.2 A
Maximum Heater-Cathode Voltage
Heater Negative with Respect to Cathode
Total DC and Peak ....................... 450 V
Triode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 2.6 pf
Output ........................................ 1 pf
Grid to Plate ................................. 0.03 pf
Triode
Source ........................................ RCA RC-29 - 1975
Plate Voltage (Absolute Max) .................. 27000 V
Negative DC Grid No. 1 Voltage ................ 135 V
Peak Negative Grid No. 1 Voltage .............. 440 V
Plate Dissipation (Absolute Max) .............. 40 W
DC Plate Current (Absolute Max) ............... 1.6 mA
Grid No. 1 Circuit Resistance ................. 3M Ω
Shunt Regulator
Source ........................................ RCA RC-29 - 1975
Unregulated DC Supply Voltage ................. 36000 V
Equivalent Resistance of Unregulated Supply ... 11M Ω
DC Reference Voltage .......................... 200 V
Equivalent Resistance of Reference Supply ..... 1K Ω
Effective Grid-Plate Transconductance ......... 200 µ
DC Plate Current for Zero Load Current ........ 1000 µa
DC Plate Current for Load Current of 1 mA ..... 45 µa
Regulated DC Output Voltage (0 mA Load) ....... 25000 V
Regulated DC Output Voltage (1 mA Load) ....... 24500 V
If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.
(c) 1994-2021 by William A. Beech, NJ7P
Fri, 24 Jun 2022 19:14:27 -0700