NJ7P SQL Tube Database Query

A horizontal ribbon.

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

A horizontal ribbon.

7B7
Remote-Cutoff Pentode

EIA Base & Outline

EIA Base: 8VEIA Bulb: 9-30

Substitute Data

Preferred Substitutes ......................... 7AH7
Substitutes ................................... 7A7 7AJ7 7H7 7T7
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Glass lock-in type used as rf or if amplifier in radio receivers employing avc. Requires lock-in 8-contact socket.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... T-9
Base Type ..................................... Lock-in 8-Pin
EIA Outline ................................... 9-30
EIA Base ...................................... 8V
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-15 - 1947
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.15 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-15 - 1947
Input ......................................... 5 pf
Output ........................................ 6 pf
Grid to Plate ................................. 0.007 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 ............................ -3 V
Plate Resistance (approx) ..................... 750K Ω
Transconductance .............................. 1750 µMho
Plate Current ................................. 8.5 mA
Grid No. 2 Current ............................ 1.7 mA

A horizontal ribbon.

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.

Please enter the tube number:

This database contains data on thousands of tubes. Every effort has been made to insure the accuracy of this reference, however, I assume no liability for the results of using information contained herein.

Other Tube Search Engines:
Frank's Electron Tube Pages

Complete Tube Manuals:
Tube Manual Index from NJ7P

A horizontal ribbon.

(c) 1994-2021 by William A. Beech, NJ7P

Tue, 29 Nov 2022 17:18:54 -0700