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6B7
Twin Diode - Remote-Cutoff Pentode

EIA Base & Outline

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

Application

Source ........................................ RCA RC-11 - 1933
Glass types used as combined detector, amplifier, and AVC tubes. Requires small 7-contact socket. Except for interelectrode capacitances, the electrical characteristics of the 6B7 are identical with those of type 6B8G.

Mechanical Data

Source ........................................ RCA RC-11 - 1933
Bulb .......................................... ST-12
Base Type ..................................... Small 7-Pin
EIA Outline ................................... 12-6
EIA Base ...................................... 7D
Top Cap ....................................... Small Metal
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

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

Direct Interelectrode Capacitances (approx)

Pentode
Input ......................................... 3.5 pf
Output ........................................ 9.5 pf
Grid to Plate ................................. 0.007 pf

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-11 - 1933
Plate Voltage ................................. 100 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -3.0 V
Amplification Factor .......................... 285
Plate Resistance (approx) ..................... 300K Ω
Transconductance .............................. 950 µMho
Plate Current ................................. 5.8 mA
Grid No. 2 Current ............................ 1.7 mA
Grid No. 1 Voltage for Ib ..................... 0 µa @ -17 V

Class A Amplifier
Source ........................................ RCA RC-11 - 1933
Plate Voltage ................................. 180 V
Grid No. 2 Voltage ............................ 75 V
Grid No. 1 Voltage ............................ -3.0 V
Amplification Factor .......................... 840
Plate Resistance (approx) ..................... 1M Ω
Transconductance .............................. 840 µMho
Plate Current ................................. 3.4 mA
Grid No. 2 Current ............................ 0.9 mA
Grid No. 1 Voltage for Ib ..................... 0 µa @ -13 V

Class A Amplifier
Source ........................................ RCA RC-11 - 1933
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage ............................ -3.0 V
Amplification Factor .......................... 800
Plate Resistance (approx) ..................... 800K Ω
Transconductance .............................. 1000 µMho
Plate Current ................................. 6.0 mA
Grid No. 2 Current ............................ 1.5 mA
Grid No. 1 Voltage for Ib ..................... 0 µa @ -17 V

Class A Amplifier
Source ........................................ RCA RC-11 - 1933
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -3.0 V
Amplification Factor .......................... 730
Plate Resistance (approx) ..................... 650K Ω
Transconductance .............................. 1125 µMho
Plate Current ................................. 9.0 mA
Grid No. 2 Current ............................ 2.3 mA
Grid No. 1 Voltage for Ib ..................... 0 µa @ -21 V

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Tue, 29 Nov 2022 20:00:00 -0700