NJ7P SQL Tube Database Query

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25D8GT
Diode - Triode - Pentode

EIA Base & Outline

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

Mechanical Data

EIA Base ...................................... 8AF

Electrical Data

Heater Voltage ................................ 25 V
Heater Current ................................ 0.15 A

Characteristics and Typical Operation

Triode Class A Amplifier
Plate Voltage ................................. 100 V
Grid No. 1 Voltage ............................ -1.0 V
Amplification Factor .......................... 100
Plate Resistance (approx) ..................... 91K Ω
Transconductance .............................. 1100 µMho
Plate Current ................................. 0.5 mA

Pentode Class A Amplifier
Plate Voltage ................................. 100 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -3.0 V
Plate Resistance (approx) ..................... 200K Ω
Transconductance .............................. 1900 µMho
Plate Current ................................. 9.5 mA
Grid No. 2 Current ............................ 2.7 mA

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Thu, 30 Jun 2022 03:06:10 -0700