NJ7P SQL Tube Database Query

A horizontal ribbon.

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A horizontal ribbon.

4HS8
Sharp-Cutoff Twin Pentode

EIA Base & Outline

EIA Base: 9FGEIA Bulb: 6-3

Substitute Data

Preferred Substitutes ......................... 4GS8
Substitutes ................................... 4BU8 4KF8
Source ........................................ RCA RC-29 - 1975

Application

Source ........................................ RCA RC-29 - 1975
Miniature type used as agc amplifier, sync and noise limiting circuits of color and bw tv receivrs. One pentode used as combined sync-separator and sync-clipper; second pentode used as agc amplifier. Requires miniature 9-contact socket.

Electrical Data

Source ........................................ RCA RC-29 - 1975
Heater Voltage ................................ 4.2 V
Heater Current ................................ 0.45 A

Source ........................................ RCA RC-29 - 1975
For other characteristics and typical operation, see 6HS8

A horizontal ribbon.

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A horizontal ribbon.

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Sun, 28 Nov 2021 23:27:50 -0700