NJ7P SQL Tube Database Query

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6LC8
High-Mu Triode - Sharp-Cutoff Pentode

EIA Base & Outline

Application

Source ........................................ RCA RC-29 - 1975
Miniature type used in color and bw tv receivers. The pentode is used in a noise-immune gated-agc-amplifier circuits, and the triode in sync-separator circuits. Requires miniature 9-contact socket.

Mechanical Data

Source ........................................ RCA RC-29 - 1975
Bulb .......................................... T-6 1/2
EIA Outline ................................... 6-3
EIA Base ...................................... 9QY

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.6 A

Direct Interelectrode Capacitances (approx)

Pentode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 10 pf
Output ........................................ 3.4 pf
Grid to Plate ................................. 0.1 pf

Triode
Source ........................................ RCA RC-29 - 1975
Input ......................................... 2.8 pf
Output ........................................ 2.2 pf
Grid to Plate ................................. 2.2 pf

Maximum Ratings (Design Center Values)

Pentode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 300 V
Grid No. 2 Voltage ............................ 300 V
Plate Dissipation ............................. 2 W
Grid No. 2 Dissipation ........................ 1.1 W

Triode
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 300 V
Plate Dissipation ............................. 1.1 W

Characteristics and Typical Operation

Triode Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 200 V
Grid No. 1 Voltage ............................ -2 V
Amplification Factor .......................... 70
Plate Resistance (approx) ..................... 17.5K Ω
Transconductance .............................. 4000 µ
Plate Current ................................. 4 mA

Pentode Class A Amplifier
Source ........................................ RCA RC-29 - 1975
Plate Voltage ................................. 150 V
Grid No. 2 Voltage ............................ 150 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 180 Ω
Plate Resistance (approx) ..................... 100K Ω
Transconductance .............................. 4400 µ
Plate Current ................................. 4 mA
Grid No. 2 Current ............................ 2.8 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

Fri, 24 Jun 2022 18:11:04 -0700