NJ7P SQL Tube Database Query

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A horizontal ribbon.

1AH4
Pentode

EIA Base & Outline

EIA Base: 1AD4EIA Bulb: 2-1

Substitute Data

Preferred Substitutes ......................... 1AK4
Substitutes ................................... 5875

Mechanical Data

Bulb .......................................... T-2x3
EIA Outline ................................... 2-1
EIA Base ...................................... 1AD4

Electrical Data

Heater Voltage ................................ 1.25 DC V
Heater Current ................................ 0.04 A

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 3.5 pf
Output ........................................ 4.5 pf
Grid to Plate ................................. 0.01 pf

Maximum Ratings (Design Center Values)

Pentode
Plate Voltage ................................. 90 V
Grid No. 2 Voltage ............................ 90 V

Characteristics and Typical Operation

Class A Amplifier
Plate Voltage ................................. 45 V
Grid No. 2 Voltage ............................ 45 V
Grid No. 1 Voltage ............................ 0 V
Plate Resistance (approx) ..................... 1.5M Ω
Transconductance .............................. 750 µMho
Plate Current ................................. 0.75 mA
Grid No. 2 Current ............................ 0.2 mA

Class A Amplifier
Plate Voltage ................................. 67.5 V
Grid No. 2 Voltage ............................ 47 V
Grid No. 1 Voltage ............................ 0 V
Plate Resistance (approx) ..................... 2M Ω
Transconductance .............................. 750 µMho
Plate Current ................................. 0.75 mA
Grid No. 2 Current ............................ 0.2 mA

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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.

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Mon, 27 Jun 2022 08:04:52 -0700