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.

6HC8
Medium-Mu Triode - Pentode

EIA Base & Outline

EIA Base: 9EXEIA Bulb: 9-70

Substitute Data

Substitutes ................................... 6BM8
Source ........................................ GE - 1973

Mechanical Data

Source ........................................ GE - 1973
Bulb .......................................... T-9 Special
Base Type ..................................... Same as Miniature Button 9-Pin Except for Diameter of Bulb
EIA Outline ................................... 9-70
EIA Base ...................................... 9EX
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ GE - 1973
Heater Voltage ................................ 6.3 V
Heater Current ................................ 1.2 A

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ GE - 1973
Plate Voltage ................................. 350 V
Grid No. 2 Voltage ............................ 315 V
Plate Dissipation ............................. 11 W
Grid No. 2 Dissipation ........................ 1.5 W

Triode
Source ........................................ GE - 1973
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 1.0 W

Characteristics and Typical Operation

Pentode Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 250 V
Grid No. 1 Voltage ............................ -18 V
Plate Resistance (approx) ..................... 55000 Ω
Transconductance .............................. 5100 µMho
Plate Current ................................. 38 mA
Grid No. 2 Current ............................ 3.0 mA

Triode Vertical Oscillatorillator
Source ........................................ GE - 1973
Plate Voltage ................................. 250 V
Grid No. 1 Voltage ............................ -3 V
Amplification Factor .......................... 68
Plate Resistance (approx) ..................... 34000 Ω
Transconductance .............................. 2000 µMho
Plate Current ................................. 1.4 mA

Pentode Vertical Amplifier
Source ........................................ GE - 1973
DC Plate Supply Voltage ....................... 250 V
Peak Negative-Pulse Plate Voltage ............. 250 V
DC Grid No. 3 Voltage ......................... 2200 V
DC Grid No. 2 Voltage ......................... -38 V
Peak Negative-Pulse Grid No. 1 Voltage ........ 38 V
Average Cathode Current ....................... 65 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

Wed, 29 Mar 2023 06:25:32 -0700