NJ7P SQL Tube Database Query

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1A7GT
Pentagrid Converter

EIA Base & Outline

EIA Base: 7ZEIA Bulb: 9-18

Substitute Data

Substitutes ................................... 1B7 1C7 1D7
Source ........................................ RCA RC-15 - 1947

Application

Source ........................................ RCA RC-15 - 1947
Glass octal type used in superhetrodyne circuits having battery power supplies. Requires octal socket and may be mounted in any position.

Mechanical Data

Source ........................................ RCA RC-15 - 1947
Bulb .......................................... T-9
Base Type ..................................... Small Wafer Octal 8-Pin with Metal Sleeve
EIA Outline ................................... 9-18
EIA Base ...................................... 7Z
Top Cap ....................................... Miniature
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-15 - 1947
Filament Voltage .............................. 1.4 DC V
Filament Current .............................. 0.05 A

Direct Interelectrode Capacitances (approx)

Pentagrid
Source ........................................ RCA RC-15 - 1947
Grid No. 3 to All (RF Input) .................. 7 pf
Grid No. 1 to ALL (Osc Input) ................. 10 pf
Plate to All (Mixer Output) ................... 0.5 pf

Maximum Ratings (Design Center Values)

Pentagrid
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 110 V
Grid No. 2 & 4 Supply Voltage (Screen) ........ 60 V
Cathode Current ............................... 110 mA
Grid No. 2 & 4 Dissipation (Screen) ........... 110 W
Grid No. 3 Voltage
Positive Bias Value ........................ 6 V

Characteristics and Typical Operation

Converter
Source ........................................ RCA RC-15 - 1947
Plate Voltage ................................. 90 V
Grid No. 1 Voltage (RMS) ...................... 45 V
Grid No. 1 Bias Voltage ....................... 90 V
Conversion Transconductance ................... 0 µMho
Plate Current ................................. 200K mA
Grid No. 2 & 4 Current (Screen) ............... 600K mA
Grid No. 1 Current ............................ 250 mA
Total Cathode Current ......................... 0.6 mA

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Fri, 12 Aug 2022 14:35:48 -0700