RK-20A
0 Tubes in archive
BrandRaytheon
ClassPentode Power Amplifier
Base5-prong medium
Construction
Primary TypePentode
EnvelopeHard glass
Base MaterialIsolantite
SectionsSingle
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage1250 V
Plate Dissipation40 W
Grid 2 Voltage300 V
Grid 1 Voltage-100 V
Cathode Current92 mA
Audio Performance
Key Features
- Thoriated tungsten filament
- Molybdenum plate
- Hard glass bulb
- Isolantite base
- Suitable for suppressor or control grid modulation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| R-F Power Amp Class C Telegraphy | 1250V | - | - | - | 89mA |
| Suppressor Grid Modulation | 1250V | - | - | - | 40mA |
Application Notes
The RK-20A may be operated at maximum ratings up to 30 megacycles. Between 30 and 60 megacycles, maximum d-c plate voltage should not exceed 900 volts. Shielding of grid input tuning from plate tuning is recommended for stability.
Showing 1 to 0 of 0 results