NJ7P SQL Tube Database Query

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6FV8A
Medium-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

Application

Source ........................................ RCA RC-29 - 1975
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.

Source ........................................ RCA RC-29 - 1975
Requires miniature 9-contact socket. Except for basing arrangement and grid-1--to-plate capacitance of pentode unit, this is identical to 6U8A.

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-6 1/2
EIA Outline ................................... 6-2
EIA Base ...................................... 9FA

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.45 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 5 pf
Output ........................................ 2.6 pf
Grid to Plate ................................. 0.02 pf

Triode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 2.5 pf
Output ........................................ 0.4 pf
Grid to Plate ................................. 1.8 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 330 V
Grid No. 2 Voltage ............................ 330 V
Plate Dissipation ............................. 2.3 W
Grid No. 2 Dissipation ........................ 0.55 W

Triode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 330 V
Plate Dissipation ............................. 2.0 W

Characteristics and Typical Operation

Pentode Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 125 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage ............................ -1.0 V
Plate Resistance (approx) ..................... 200K Ω
Transconductance .............................. 6500 µ
Plate Current ................................. 12 mA
Grid No. 2 Current ............................ 4.0 mA

Triode Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 125 V
Grid No. 1 Voltage ............................ -1.0 V
Amplification Factor .......................... 45
Plate Resistance (approx) ..................... 5600 Ω
Transconductance .............................. 8000 µ
Plate Current ................................. 12 mA

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

Thu, 02 Feb 2023 23:02:36 -0700