Tube-number record
14A7/12B7
0 archive entries
14A7/12B7 is a tube type in the TubeDatabase archive (class: Pentode Voltage Amplifier). Recorded specifications: brand Tung-Sol, year 1950, construction Pentode, base Lock-in, socket Loctal, maximum plate voltage 300 V, and maximum plate dissipation 4 W. The archive does not yet hold a photographed example of this type.
BrandTung-Sol
ClassPentode Voltage Amplifier
BaseLoctal
Filament12.6 V @ 150 mA
Construction
Primary TypePentode
EnvelopeGlass Bulb
Base MaterialLock-in
SectionsSingle
Filament / Heater
Heater NotesAC or DC
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier | 100 V | 2350 | 120000 | — | 13 mA |
| Class A1 Amplifier | 250 V | 2000 | 800000 | — | 9.2 mA |
Application Notes
Designed for RF or IF service in AC/DC receivers.
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