NJ7P SQL Tube Database Query

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6BY8
Diode - Sharp-Cutoff Pentode

EIA Base & Outline

Application

Source ........................................ RCA RC-29 - 1975
Miniature type used in television receiver applications. The pentode unit is used as an rf ampifier and the high-perveance diode as a limiter or detector. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 9-Pin
EIA Outline ................................... 6-3
EIA Base ...................................... 9FN
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.6 A
Heater Warm-up Time ........................... 11 s
Maximum Heater-Cathode Voltage ................ 100 V
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode
DC Component ............................ 200 V
Heater Negative with Respect to Cathode
DC Component ............................ 200 V

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 5.5 pf
Output ........................................ 5 pf
Grid to Plate ................................. 0.0035 pf

Pentode
Source ........................................ RCA RC-29 - 1975
Output ........................................ 4.4 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 300 V
Grid No. 3 Voltage ............................ 0 V
Grid No. 2 Voltage ............................ 300 V
Negative Grid No. 1 Voltage ................... 50 V
Positive Grid No. 1 Voltage ................... 0 V
Plate Dissipation ............................. 3.0 W
Grid No. 2 Dissipation ........................ 0.65 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 250K Ω
Self Bias .................................. 1M Ω

Pentode
Source ........................................ RCA RC-29 - 1975
Peak Inverse Plate Voltage .................... 430 V
Steady State Peak Plate Current Each Plate .... 180 mA
Steady State DC Output Current Each Plate ..... 45 mA

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 68 Ω
Plate Resistance (approx) ..................... 1M Ω
Transconductance .............................. 5200 µ
Plate Current ................................. 10.6 mA
Grid No. 2 Current ............................ 4.3 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -6.5 V

Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 100 V
Grid No. 2 Voltage ............................ 100 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 150 Ω
Plate Resistance (approx) ..................... 500K Ω
Transconductance .............................. 3900 µ
Plate Current ................................. 5.0 mA
Grid No. 2 Current ............................ 2.1 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -4.2 V

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

Wed, 29 Mar 2023 06:34:01 -0700