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1A6
Pentagrid Converter

EIA Base & Outline

EIA Base: 6LEIA Bulb: 12-6

Substitute Data

Preferred Substitutes ......................... 1C6
Source ........................................ RCA RC-12 - 1934

Application

Source ........................................ RCA RC-12 - 1934
The 1A6 is a multi-electrode type of vacuum tube designed to perform simultaneously the function of a mixer tube and of an oscillator tube in superheterodyne circuits.

Source ........................................ RCA RC-12 - 1934
Through its use, the independent control of each function is made possible within a single tube. The 1A6 is designed especially for use in battery-operated receivers.

Source ........................................ RCA RC-12 - 1934
In such service, this tube replaces the two tubes required in conventional circuits and gives improved performance.

Mechanical Data

Source ........................................ RCA RC-12 - 1934
Bulb .......................................... ST-12
Base Type ..................................... Small 6-Pin
EIA Outline ................................... 12-6
EIA Base ...................................... 6L
Top Cap ....................................... Small Metal

Electrical Data

Source ........................................ RCA RC-12 - 1934
Filament Voltage .............................. 2.0 DC V
Filament Current .............................. 0.06 A

Direct Interelectrode Capacitances (approx)

Pentagrid
Source ........................................ RCA RC-12 - 1934
Grid No. 4 to Plate ........................... 0.25 pf
Grid No. 4 to Grid No. 2 ...................... 0.20 pf
Grid No. 4 to Grid No. 1 ...................... 0.1 pf
Grid No. 1 to Grid No. 2 ...................... 0.8 pf
Grid No. 4 to ALL (RF Input) .................. 10.5 pf
Grid No. 2 to All (Osc Output) ................ 6.0 pf
Grid No. 1 to All (Osc Input) ................. 5.0 pf
Plate to All (Mixer Output) ................... 9.0 pf

Maximum Ratings (Design Center Values)

Pentagrid
Source ........................................ RCA RC-12 - 1934
Plate Voltage ................................. 180 V
Grid No. 3 & 5 Voltage (Screen) ............... 67.5 V
Grid No. 2 Voltage (Anode) .................... 135 V
Grid No. 3 & 5 Supply Voltage (Screen) ........ 180 V
Grid No. 2 Supply Voltage (Anode) ............. 9 V
Grid No. 4 Voltage
Positive Bias Value ........................ -3 V

Characteristics and Typical Operation

Converter
Source ........................................ RCA RC-12 - 1934
Plate Voltage ................................. 135 V
Grid No. 3 & 5 Voltage (Screen) ............... 67.5 V
Grid No. 2 Voltage (Anode) .................... 135 V
Grid No. 4 Bias Voltage ....................... -3 V
Grid No. 1 Resistor ........................... 50K Ω
Plate Resistance (approx) ..................... 0.4M Ω
Conversion Transconductance ................... 275 µMho
Plate Current ................................. 1.2 mA
Grid No. 3 & 5 Current (Screen) ............... 2.5 mA
Grid No. 2 Current (Anode) .................... 2.3 mA
Grid No. 1 Current ............................ 0.2 mA
Total Cathode Current ......................... 6.2 mA

Converter
Source ........................................ RCA RC-12 - 1934
Plate Voltage ................................. 180 V
Grid No. 3 & 5 Voltage (Screen) ............... 67.5 V
Grid No. 2 Voltage (Anode) .................... 135 V
Grid No. 4 Bias Voltage ....................... -3 V
Grid No. 1 Resistor ........................... 50K Ω
Plate Resistance (approx) ..................... 0.5M Ω
Conversion Transconductance ................... 300 µMho
Plate Current ................................. 1.3 mA
Grid No. 3 & 5 Current (Screen) ............... 2.4 mA
Grid No. 2 Current (Anode) .................... 2.3 mA
Grid No. 1 Current ............................ 0.2 mA
Total Cathode Current ......................... 6.2 mA

Notes

Source ........................................ RCA RC-14 - 1940
1. Type 1A6 is identical electrically with type 1D7G, except for interelectrode capacitances.

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Mon, 05 Dec 2022 00:28:33 -0700