Note: Please do not link down into my pages. I change this directory structure often and your links will not work correctly.
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Preferred Substitutes ......................... 7T7
Substitutes ................................... 7A7 7AG7 7AH7 7V7
Source ........................................ RCA RC-15 - 1947
Source ........................................ RCA RC-15 - 1947
Glass lock-in type used as rf or if amplifier in radio receivers. Requires lock-in socket.
Source ........................................ RCA RC-15 - 1947
Bulb .......................................... T-9
Base Type ..................................... Lock-in 8-Pin
EIA Outline ................................... 9-30
EIA Base ...................................... 8V
Source ........................................ RCA RC-15 - 1947
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A
Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 100 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -1.5 V
Plate Resistance (approx) ..................... 350K Ω
Transconductance .............................. 4000 µ
Plate Current ................................. 7.5 mA
Grid No. 2 Current ............................ 2.6 mA
Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 180 Ω
Plate Resistance (approx) ..................... 800K Ω
Transconductance .............................. 4000 µ
Plate Current ................................. 10 mA
Grid No. 2 Current ............................ 3.2 mA
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
Mon, 06 Feb 2023 18:59:38 -0700