Tube-number record
BEAM POWER AMPLIFIER
0 archive entries
BEAM POWER AMPLIFIER is a tube type in the TubeDatabase archive (class: Audio Power Tube). Recorded specifications: brand TUNG-SOL, year 1941, construction Beam tetrode / beam power, base Intermediate, socket Octal, maximum plate voltage 110 V, and maximum plate dissipation 19 W. The archive does not yet hold a photographed example of this type.
BrandTUNG-SOL
ClassAudio Power Tube
BaseOctal
Filament6.3 V @ 900 mA
Construction
Primary TypeBeam tetrode / beam power
EnvelopeT-9
Base MaterialIntermediate
SectionsSingle
Filament / Heater
MaterialCoated
Heater NotesIndirectly heated cathode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A1 Amplifier (Self-Bias) | 84 V | 1050 | 250000 | — | 5.4 mA |
| Class A1 Amplifier (Fixed-Bias) | 90 V | 1150 | 225000 | — | 6.5 mA |
Application Notes
Designed for service with 90 volts of 'B' battery and a single dry cell 'A' battery.
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