NJ7P SQL Tube Database Query

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3D6
UHF Tetrode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 1299
Substitutes ................................... 3LE4 3LF4
Source ........................................ ARRL HB - 1947

Mechanical Data

Source ........................................ ARRL HB - 1947
Bulb .......................................... T-9
Base Type ..................................... Lock-In 8-Pin
EIA Outline ................................... 9-30
EIA Base ...................................... 6BB

Electrical Data

Source ........................................ ARRL HB - 1947
Filament Voltage .............................. 1.4 DC V
Filament Current .............................. 0.22 A

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ ARRL HB - 1947
Plate Voltage ................................. 135 V
Grid No. 2 Voltage ............................ 90 V
Grid No. 1 Voltage ............................ -6 V
Transconductance .............................. 2200 µ
Plate Current ................................. 5.7 mA
Grid No. 2 Current ............................ 0.7 mA
Load Resistance ............................... 13K Ω
Power Output (approx) ......................... 0.0005 W

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

Sat, 25 Jun 2022 16:51:16 -0700