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6A7
Pentagrid Converter

EIA Base & Outline

EIA Base: 7CEIA Bulb: 12-6
Source ........................................ RCA RC-11 - 1933

Application

Source ........................................ RCA RC-11 - 1933
Glass type used in superhetrodyne circuits. Requires small 7-contact socket. Except for interelectrode capacitances, the 6A7 is identical electrically with type 6A8.

Mechanical Data

Source ........................................ RCA RC-11 - 1933
Bulb .......................................... ST-12
Base Type ..................................... Small 7-Pin
EIA Outline ................................... 12-6
EIA Base ...................................... 7C
Top Cap ....................................... Small
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-11 - 1933
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A

Direct Interelectrode Capacitances (approx)

Pentagrid
Source ........................................ RCA RC-11 - 1933
Grid No. 4 to Plate ........................... 0.30 pf
Grid No. 4 to Grid No. 2 ...................... 0.15 pf
Grid No. 4 to Grid No. 1 ...................... 0.15 pf
Grid No. 1 to Grid No. 2 ...................... 1.0 pf
Grid No. 4 to ALL (RF Input) .................. 8.5 pf
Grid No. 2 to All (Osc Output) ................ 5.5 pf
Grid No. 1 to All (Osc Input) ................. 7.0 pf
Plate to All (Mixer Output) ................... 9.0 pf

Maximum Ratings (Design Center Values)

Pentagrid
Source ........................................ RCA RC-11 - 1933
Plate Voltage ................................. 250 V
Grid No. 3 & 5 Voltage (Screen) ............... 100 V
Grid No. 2 Voltage (Anode) .................... 200 V
Grid No. 2 Supply Voltage (Anode) ............. 250 V
Cathode Current ............................... 14 mA
Grid No. 2 Dissipation (Anode) ................ -3 W
Grid No. 4 Voltage
Negative Bias Value ........................ V
Positive Bias Value ........................ V

Characteristics and Typical Operation

Converter
Source ........................................ RCA RC-11 - 1933
Plate Voltage ................................. 250 V
Grid No. 3 & 5 Voltage (Screen) ............... 100 V
Grid No. 2 Voltage (Anode) .................... 200 V
Grid No. 4 Bias Voltage ....................... -3.0 V
Grid No. 1 Resistor ........................... 50K Ω
Plate Resistance (approx) ..................... 360K Ω
Conversion Transconductance ................... 520 µMho
Plate Current ................................. 3.5 mA
Grid No. 3 & 5 Current (Screen) ............... 2.2 mA
Grid No. 2 Current (Anode) .................... 4.0 mA
Grid No. 1 Current ............................ 0.7 mA
Total Cathode Current ......................... 10.4 mA

Converter
Source ........................................ RCA RC-11 - 1933
Plate Voltage ................................. 100 V
Grid No. 3 & 5 Voltage (Screen) ............... 50 V
Grid No. 2 Voltage (Anode) .................... 100 V
Grid No. 4 Bias Voltage ....................... -1.5 V
Grid No. 1 Resistor ........................... 10K Ω
Plate Resistance (approx) ..................... 600K Ω
Conversion Transconductance ................... 350 µMho
Plate Current ................................. 1.3 mA
Grid No. 3 & 5 Current (Screen) ............... 2.5 mA
Grid No. 2 Current (Anode) .................... 3.3 mA
Grid No. 1 Current ............................ 1.2 mA
Total Cathode Current ......................... 8.3 mA

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Sat, 04 Dec 2021 20:16:37 -0700