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Preferred Substitutes ......................... 6FV8 6JN8
Substitutes ................................... 6BE8 6CL8 6FG7
Miniature type used in color and black-and-white television receiver applications. Especially useful as combined triode oscillator and pentode mixer in vhf television tuners.
Requires miniature 9-contact socket. Except for basing arrangement and grid-1--to-plate capacitance of pentode unit, this is identical to 6U8A.
Bulb .......................................... T-6 1/2
Base Type ..................................... Miniature Button 9-Pin
EIA Outline ................................... 6-2
EIA Base ...................................... 9FA
Cathode ....................................... Coated Unipotential
Mounting Position ............................. Any
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
Pentode
Shielded Unshielded
Input ......................................... 5 5 pf
Output ........................................ 2.6 3.5 pf
Grid to Plate ................................. 0.015 0.008 pf
Triode
Shielded Unshielded
Input ......................................... 2.5 2.5 pf
Output ........................................ 0.4 1.0 pf
Grid to Plate ................................. 1.8 1.8 pf
Pentode
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 2.8 W
Grid No. 2 Dissipation ........................ 0.5 W
Triode
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 2.7 W
Pentode Class A Amplifier
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 µ
Plate Current ................................. 10 mA
Grid No. 2 Current ............................ 3.5 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -10 V
Triode Class A Amplifier
Plate Voltage ................................. 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 56 Ω
Amplification Factor .......................... 40
Plate Resistance (approx) ..................... 5000 Ω
Transconductance .............................. 8500 µ
Plate Current ................................. 18 mA
Grid No. 1 Voltage for Ib ..................... 10 µa @ -12 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
Mon, 30 Jan 2023 02:02:21 -0700