NJ7P SQL Tube Database Query

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6BU8
Dual Sharp-Cutoff Pentode

EIA Base & Outline

Substitute Data

Preferred Substitutes ......................... 6HS8
Substitutes ................................... 6GS8 6KF8
Source ........................................ RCA DS 01/62

Application

Source ........................................ RCA DS 01/62
Miniature type used as combined sync separator, sync clipper, and agc amplifier tube in color and black-and-white television receivers. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ RCA DS 01/62
Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 9-Pin
EIA Outline ................................... 6-3
EIA Base ...................................... 9FG
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA DS 01/62
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 DS 01/62
Grid No. 3 to Plate (Each Unit) ............... 1.9 pf
Grid No. 1 to All ............................. 6.0 pf
Grid No. 3 to All (Each Unit) ................. 3.6 pf
Plate to All (Each Unit) ...................... 3.0 pf
Grid No. 3 to Grid No. 3 ...................... 0.015 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA DS 01/62
Plate Voltage (Each Unit) ..................... 300 V
Grid No. 3 Voltage (Each Unit)
Peak Positive Value ........................ 50 V
Negative Bias Value ........................ 0 V
Positive Bias Value ........................ 3 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage
Negative Bias Value ........................ 50 V
Cathode Current ............................... 12 mA
Grid No. 2 Input .............................. 0.75 W
Plate Dissipation ............................. 1.1 W
Grid No. 3 Circuit Resistance (Each Unit) ..... 500K Ω
Grid No. 1 Circuit Resistance ................. 500K Ω

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA DS 01/62
With Both Units Operating
Plate Voltage (Each Unit) ..................... 100 V
Grid No. 3 Voltage (Each Unit) ................ 0 V
Grid No. 2 Voltage ............................ 67.5 V
Plate Current (Each Unit) ..................... 2.2 mA
Grid No. 2 Current ............................ 3.3 mA
Cathode Current ............................... 7.8 mA
With One Unit Operating
Plate Voltage ................................. 100 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 3 to Plate Transconductance .......... 180 µ
Grid No. 1 to Plate Transconductance .......... 1500 µ
Plate Current ................................. 2.2 mA
Grid No. 3 Voltage for Ib ..................... 100 µa @ -4.5 V
Grid No. 1 Voltage for Ib ..................... 100 µa @ -2.3 V

Class A Amplifier
Source ........................................ RCA DS 01/62
With Both Units Operating
Plate Voltage (Each Unit) ..................... 100 V
Grid No. 3 Voltage (Each Unit) ................ -10 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 2 Current ............................ 6.5 mA
Cathode Current ............................... 6.6 mA
With One Unit Operating
Plate Voltage ................................. 100 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 67.5 V
Grid No. 1 Voltage ............................ 0 V
Grid No. 1 to Plate Transconductance .......... 1500 µ

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

Tue, 31 Jan 2023 09:49:42 -0700