NJ7P SQL Tube Database Query

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6BE8A
Medium-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

EIA Base: 9EGEIA Bulb: 6-2

Substitute Data

Preferred Substitutes ......................... 6BR8
Substitutes ................................... 6FV8 6JN8 8446
Source ........................................ ARRL HB - 1964

Application

Source ........................................ ARRL HB - 1964
Miniature type used as an oscillator and mixer in VHF tuner service. The pentode number 3 shield and internal shield are connected to the triode cathode. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ ARRL HB - 1964
Bulb .......................................... T-6 1/2
Base Type ..................................... Small Button 9-Pin
EIA Outline ................................... 6-2
EIA Base ...................................... 9EG
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any

Electrical Data

Source ........................................ ARRL HB - 1964
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.45 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 ........................................ ARRL HB - 1964
Input ......................................... 4.4 pf
Output ........................................ 2.6 pf
Grid to Plate ................................. 0.04 pf

Triode
Source ........................................ ARRL HB - 1964
Input ......................................... 2.8 pf
Output ........................................ 1.5 pf
Grid to Plate ................................. 1.8 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 2.8 W
Grid No. 2 Dissipation ........................ 0.5 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 0.25M Ω
Self Bias .................................. 1M Ω

Triode
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 2.5 W
Grid No. 1 Circuit Resistance
Fixed Bias ................................. 0.5M Ω
Self Bias .................................. 1M Ω

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 56 Ω
Amplification Factor .......................... 40
Plate Resistance (approx) ..................... 5K Ω
Transconductance .............................. 8500 µMho
Plate Current ................................. 18 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -12 V

Pentode Class A Amplifier
Source ........................................ ARRL HB - 1964
Plate Voltage ................................. 250 V
Grid No. 2 Voltage ............................ 110 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 68 Ω
Plate Resistance (approx) ..................... 400K Ω
Transconductance .............................. 5200 µMho
Plate Current ................................. 10 mA
Grid No. 2 Current ............................ 3.5 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -10 V

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Sat, 02 Jul 2022 20:42:41 -0700