NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

1F6
Twin Diode - Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 6WEIA Bulb: 12-6
Source ........................................ RCA RC-13 - 1937

Application

Source ........................................ RCA RC-13 - 1937
Glass octal type used as combined detector, amplifier, and avc tube in battry-operated receivers. Requires six-contact socket. Similar electrically to type 1F7G.

Mechanical Data

Source ........................................ RCA RC-13 - 1937
Bulb .......................................... ST-12
Base Type ..................................... Small 6-Pin
EIA Outline ................................... 12-6
EIA Base ...................................... 6W
Top Cap ....................................... Small Metal
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-13 - 1937
Filament Voltage .............................. 2.0 DC V
Filament Current .............................. 0.06 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-13 - 1937
Input ......................................... 4 pf
Output ........................................ 9 pf
Grid to Plate ................................. 0.007 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 180 V
Grid No. 2 Voltage ............................ 67.5 V
Cathode Current ............................... mA
Grid No. 1 Circuit Resistance
Fixed Bias ................................. Ω
Self Bias .................................. Ω
Bulb Temperature (At Hottest Point) ........... °C

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-13 - 1937
Plate Voltage ................................. 180 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ -1.5 V
Amplification Factor .......................... 650
Plate Resistance (approx) ..................... 1M Ω
Transconductance .............................. 650 µMho
Plate Current ................................. 2.2 mA
Grid No. 2 Current ............................ 0.6 mA

A horizontal ribbon.

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A horizontal ribbon.

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Sat, 02 Jul 2022 07:16:02 -0700