NJ7P SQL Tube Database Query

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1C6
Pentagrid Converter

EIA Base & Outline

Application

Source ........................................ RCA RC-12 - 1934
Glass octal type used in battery-operated receivers. Similar electrically to type 1C7G except for interelectrode capacitances. Tube requires octal socket.

Mechanical Data

Source ........................................ RCA RC-12 - 1934
Bulb .......................................... ST-12
Base Type ..................................... 6-pin Socket
EIA Outline ................................... 12-6
EIA Base ...................................... 6L

Electrical Data

Source ........................................ RCA RC-12 - 1934
Filament Voltage .............................. 2.0 DC V
Filament Current .............................. 0.12 A

Direct Interelectrode Capacitances (approx)

Pentagrid
Source ........................................ RCA RC-12 - 1934
Grid No. 4 to Plate ........................... 0.30 pf
Grid No. 4 to Grid No. 2 ...................... 0.30 pf
Grid No. 4 to Grid No. 1 ...................... 0.15 pf
Grid No. 1 to Grid No. 2 ...................... 1.5 pf
Grid No. 4 to ALL (RF Input) .................. 10.0 pf
Grid No. 2 to All (Osc Output) ................ 6.0 pf
Grid No. 1 to All (Osc Input) ................. 6.0 pf
Plate to All (Mixer Output) ................... 10.0 pf

Maximum Ratings (Design Center Values)

Pentagrid Converter
Source ........................................ RCA RC-12 - 1934
Plate Voltage ................................. 180 V
Grid No. 5 & Internal Shield .................. 67.5 V
Grid No. 2 & 4 Voltage (Screen) ............... 135 V
Cathode Current ............................... 180 mA
Plate Dissipation ............................. 9 W

Characteristics and Typical Operation

Converter
Source ........................................ RCA RC-12 - 1934
Plate Voltage ................................. 180 V
Grid No. 5 & Internal Shield Voltage .......... 67.5 V
Grid No. 2 & 4 Voltage (Screen) ............... 112 V
Grid No. 3 Bias Voltage ....................... -3 V
Grid No. 1 Resistor ........................... 50K Ω
Plate Resistance (approx) ..................... 750K Ω
Conversion Transconductance ................... 325 µ
Plate Current ................................. 1.5 mA
Grid No. 2 & 4 Current (Screen) ............... 2 mA
Grid No. 1 Current ............................ 3.3 mA
Total Cathode Current ......................... 0.2 mA

Converter
Source ........................................ RCA RC-12 - 1934
Plate Voltage ................................. 135 V
Grid No. 5 & Internal Shield Voltage .......... 67.5 V
Grid No. 2 & 4 Voltage (Screen) ............... 83 V
Grid No. 3 Bias Voltage ....................... -3 V
Grid No. 1 Resistor ........................... 50K Ω
Plate Resistance (approx) ..................... 550K Ω
Conversion Transconductance ................... 300 µ
Plate Current ................................. 1.3 mA
Grid No. 2 & 4 Current (Screen) ............... 2 mA
Grid No. 1 Current ............................ 2.6 mA
Total Cathode Current ......................... 0.2 mA

Source ........................................ RCA RC-12 - 1934
For other characteristics and typical operation, see Anode voltage greater than 135 volts should be applied through a 20K dropping resistor bypassed by a 0.1 mmfd capacitor.

If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.

(c) 1994-2021 by William A. Beech, NJ7P

Thu, 11 Aug 2022 13:43:56 -0700