NJ7P SQL Tube Database Query

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6BZ6
Semiremote-Cutoff Pentode

EIA Base & Outline

EIA Base: 7CMEIA Bulb: 5-2

Substitute Data

Preferred Substitutes ......................... 6GM6 6HQ6 6JH6
Substitutes ................................... 6JK6
Source ........................................ RCA RC-29 - 1975

Application

Source ........................................ RCA RC-29 - 1975
Miniature type used in gain-controlled video if stages of color and black-and-white television receivers. Requires miniature 7-contact socket. This type also used as rf amplifier in commercial HF rceivers.

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-5 1/2
Base Type ..................................... Miniature Button 7-Pin
EIA Outline ................................... 5-2
EIA Base ...................................... 7CM
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode
DC Component ............................ 100 V
Total DC and Peak ....................... 200 V
Heater Negative with Respect to Cathode
Total DC and Peak ....................... 200 V

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-29 - 1975
Shielded Unshielded
Input ......................................... 7.0 7.0 pf
Output ........................................ 2.0 3.0 pf
Grid to Plate ................................. 0.025 0.015 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 330 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 330 V
Negative Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 2.3 W
Grid No. 2 Dissipation ........................ 0.55 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 250K Ω
Self Bias .................................. 1M Ω

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 200 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 180 Ω
Plate Resistance (approx) ..................... 600K Ω
Transconductance .............................. 6100 µMho
Plate Current ................................. 11 mA
Grid No. 2 Current ............................ 2.6 mA

Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 125 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 56 Ω
Plate Resistance (approx) ..................... 260K Ω
Transconductance .............................. 8000 µMho
Plate Current ................................. 14 mA
Grid No. 2 Current ............................ 3.6 mA

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A horizontal ribbon.

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Tue, 16 Aug 2022 10:21:02 -0700