NJ7P SQL Tube Database Query

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21A7
Triode Hexode Converter

EIA Base & Outline

EIA Base: 8AR
Source ........................................ ARRL HB -1947

Mechanical Data

EIA Base ...................................... 8AR

Electrical Data

Heater Voltage ................................ 21 V
Heater Current ................................ 0.16 A

Characteristics and Typical Operation

Triode Class A Amplifier
Plate Voltage ................................. 150 V
Grid No. 1 Voltage ............................ -3.0 V
Amplification Factor .......................... 32
Transconductance .............................. 1900 µMho
Plate Current ................................. 3.5 mA

Hexode Class A Amplifier
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -3.0 V
Transconductance .............................. 275 µMho
Plate Current ................................. 1.3 mA
Grid No. 2 Current ............................ 2.8 mA

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Thu, 30 Jun 2022 06:16:38 -0700