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.

5DH8
High-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 9EGEIA Bulb: 6-2

Substitute Data

Substitutes ................................... 5BE8 5BR8 5CL8 5
Source ........................................ GE - 1973

Mechanical Data

Source ........................................ GE - 1973
Bulb .......................................... T-6 1/2
EIA Outline ................................... 6-2
EIA Base ...................................... 9EG

Electrical Data

Source ........................................ GE - 1973
Heater Voltage ................................ 5.2 V
Heater Current ................................ 0.6 A

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ GE - 1973
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 2.2 W
Grid No. 2 Dissipation ........................ 0.55 W

Triode
Source ........................................ GE - 1973
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 2.0 W

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 250 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 390 Ω
Amplification Factor .......................... 53
Plate Resistance (approx) ..................... 12000 Ω
Transconductance .............................. 4400 µMho
Plate Current ................................. 7.3 mA

Pentode Class A Amplifier
Source ........................................ GE - 1973
Plate Voltage ................................. 125 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 56 Ω
Plate Resistance (approx) ..................... 150K Ω
Transconductance .............................. 8600 µMho
Plate Current ................................. 13.5 mA
Grid No. 2 Current ............................ 3.8 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

Sat, 04 Dec 2021 19:06:27 -0700