NJ7P SQL Tube Database Query

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6CF6
Sharp-Cutoff Pentode

EIA Base & Outline

Application

Source ........................................ RCA RC-29 - 1975
Miniature type used in television receivers as if amplifier at frequencies up to about 45 MHz and as rf amplifiers in vhf television tuners. Requires miniature 7-contact socket.

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-5 1/2
Base Type ..................................... Miniature Button 7-Pin
EIA Outline ................................... 5-2
EIA Base ...................................... 7CM
Mounting Position ............................. Any

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 6.5 pf
Output ........................................ 3.0 pf
Grid to Plate ................................. 0.015 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

Characteristics and Typical Operation

Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 125 V
Grid No. 2 Voltage ............................ 125 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 56 Ω
Plate Resistance (approx) ..................... 300K Ω
Transconductance .............................. 7800 µ
Plate Current ................................. 12.5 mA
Grid No. 2 Current ............................ 3.7 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

Wed, 08 Feb 2023 22:13:49 -0700