NJ7P SQL Tube Database Query

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18FW6
Remote Cutoff Pentode

EIA Base & Outline

Substitute Data

Substitutes ................................... 18GD6

Mechanical Data

Bulb .......................................... T-5 1/2
Base Type ..................................... Miniature Button 7-Pin
EIA Outline ................................... 5-2
EIA Base ...................................... 7CC
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Heater Voltage ................................ 18 V
Heater Current ................................ 0.1 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 5.5 pf
Output ........................................ 5 pf
Grid to Plate ................................. 0.0035 pf

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 150 V
Grid No. 2 Voltage ............................ 100 V
Plate Resistance (approx) ..................... 250K Ω
Transconductance .............................. 4400 µ
Plate Current ................................. 11 mA
Grid No. 2 Current ............................ 4.4 mA

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 Mar 2023 20:18:37 -0700