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.

12DL8
Twin Diode - Power Tetrode

EIA Base & Outline

EIA Base: 9HREIA Bulb: 6-3

Substitute Data

Preferred Substitutes ......................... 12DV8
Substitutes ................................... 12DS7
Source ........................................ ARRL HB - 1964

Mechanical Data

Source ........................................ ARRL HB - 1964
Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 9-Pin
EIA Outline ................................... 6-3
EIA Base ...................................... 9HR
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ ARRL HB - 1964
Heater Voltage ................................ 10-16 V
Heater Current ................................ 0.55 A

Direct Interelectrode Capacitances (approx)

Diode
Source ........................................ ARRL HB - 1964
Output ........................................ 1.6 pf

Tetrode
Source ........................................ ARRL HB - 1964
Input ......................................... 12 pf
Output ........................................ 1.3 pf
Grid to Plate ................................. 14 pf

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 12.6 V
Grid No. 2 Voltage ............................ -2.0 V
Grid No. 1 Voltage ............................ 12.6 V
Amplification Factor .......................... 7.2
Plate Resistance (approx) ..................... 480 Ω
Transconductance .............................. 15K µMho
Plate Current ................................. 40 mA
Grid No. 2 Current ............................ 75 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

Fri, 19 Aug 2022 07:56:10 -0700