NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

12DV8
Twin Diode - Power Tetrode

EIA Base & Outline

EIA Base: 9HREIA Bulb: 6-3

Substitute Data

Substitutes ................................... 12DL8
Source ........................................ ARRL HB - 1964

Application

Source ........................................ ARRL HB - 1964
Miniature type used a detector, AVC rectifier and space-charge grid tetrode audio power amplifier driver. This tube is designed to operate where heater and plate voltage ar supplied directly from a 12 volt battery. Requires miniature 7-contact socket.

Mechanical Data

Source ........................................ ARRL HB - 1964
EIA Outline ................................... 6-3
EIA Base ...................................... 9HR

Electrical Data

Source ........................................ ARRL HB - 1964
Heater Voltage ................................ 10-16 V
Heater Current ................................ 0.375 A

Direct Interelectrode Capacitances (approx)

Tetrode
Source ........................................ ARRL HB - 1964
Input ......................................... 9 pf
Output ........................................ 1 pf
Grid to Plate ................................. 12 pf

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 12.6 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 18 Ω
Amplification Factor .......................... 7.6
Plate Current ................................. 6.8 mA
Load Resistance ............................... 1250 Ω
Power Output (approx) ......................... 0.005 W

A horizontal ribbon.

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A horizontal ribbon.

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Tue, 09 Aug 2022 06:01:12 -0700