Tube-number record
4GS8
0 archive entries
4GS8 is a tube type in the TubeDatabase archive (class: Dual Pentode). Recorded specifications: brand Tung-Sol, year 1960, construction Pentode, base Glass, socket Noval (B9A), maximum plate voltage 300 V, and maximum plate dissipation 1.1 W. The archive does not yet hold a photographed example of this type.
BrandTung-Sol
ClassDual Pentode
BaseNoval (B9A)
Filament4.2 V @ 450 mA
Construction
Primary TypePentode
EnvelopeGlass
Base MaterialGlass
Sections2
Filament / Heater
MaterialCoated Unipotential Cathode
Warm-up Time11s
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Both sections operating | 100 V | — | — | — | 2 mA |
| Each section separately | 100 V | 270 | — | — | 2 mA |
Application Notes
Primarily intended for service as a combined sync separator-clipper and AGC tube in television receivers.
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