HF-175
0 Tubes in archive
BrandAmperex
ClassTransmitting Tube
BaseJumbo 4-pin bayonet
Construction
Primary TypeTriode
EnvelopeGlass
SectionsSingle
Filament / Heater
MaterialThoriated Tungsten
Absolute Maximum Ratings
Plate Voltage2000 V
Plate Dissipation125 W
Grid 1 Voltage-400 V
Audio Performance
Power Output415 W
Key Features
- Radiation Cooled
- Thoriated Tungsten Filament
- Jumbo 4 Pin Base with Bayonet Pin
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| A.F. Power Amplifier and Modulator—Class B (per Tube) | 2000V | 4000 | 3250 | 18 | 332mA |
| R.F. Power Amplifier—Class B—Telephony | 2000V | - | - | - | 97mA |
| R.F. Power Amplifier and Oscillator—Class C—Telegraphy | 2000V | - | - | - | 200mA |
Application Notes
Grid voltages are given with respect to the filament operated on A.C. If D.C. is used, each stated value of grid voltage should be decreased by 5 volts and the circuit returns made to the negative end of the filament.
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