NJ7P SQL Tube Database Query

Note: Please do not link down into my pages. I change this directory structure often and your links will not work correctly.

7E7
Twin Diode-Remote-Cutoff Pentode

EIA Base & Outline

Application

Source ........................................ RCA RC-15 - 1947
Glass lock-in type used as combined detector, amplifier, and avc tube. Requires lock-in socket.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... T-9
Base Type ..................................... Lock-in 8-Pin
EIA Outline ................................... 9-30
EIA Base ...................................... 8AE

Electrical Data

Source ........................................ RCA RC-15 - 1947
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-15 - 1947
Input ......................................... 4.6 pf
Output ........................................ 5.5 pf
Grid to Plate ................................. 0.005 pf

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 330 Ω
Plate Resistance (approx) ..................... 700K Ω
Transconductance .............................. 1300 µ
Plate Current ................................. 7.5 mA
Grid No. 2 Current ............................ 1.6 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

Wed, 29 Mar 2023 07:08:26 -0700