Tube-number record
PENTODE POWER AMPLIFIER OSCILLATOR
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BrandTUNG-SOL
ClassPower Pentode
Base5-pin
Filament12.6 V @ 0.45 mA
Construction
Primary TypePentode
EnvelopeGlass Bulb
Base MaterialMicanol
SectionsSingle
Filament / Heater
MaterialCoated
Absolute Maximum Ratings
Plate Voltage750 V
Plate Dissipation30 W
Grid 2 Voltage250 V
Grid 1 Voltage-200 V
Cathode Current110 mA
Audio Performance
Key Features
- Coated filament
- Medium Metal Cap
- Micanol Base
- Designed for portable equipment
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C R-F Amplifier or Oscillator (Suppressor 0V) | 500 V | — | — | — | 100 mA |
| Class C R-F Amplifier or Oscillator (Suppressor 0V) | 750 V | — | — | — | 100 mA |
| Suppressor Modulated Class C Amplifier | 500 V | — | — | — |
Application Notes
The RK-45 may be operated at the maximum ratings at frequencies up to 30 megacycles. Above 30 megacycles, plate voltage should be lowered to prevent excessive plate dissipation.
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