Tube-number record
RK-33
0 archive entries
BrandRaytheon
ClassTwin Triode
BaseSpecial / none
Filament6.3 V @ 600 mA
Construction
Primary TypeDual triode
EnvelopeGlass
Base MaterialIsolantite
Sections2
Filament / Heater
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation2.5 W
Cathode Current20 mA
Audio Performance
Key Features
- Twin Triode Amplifier/Oscillator
- Isolantite Base
- Heater type
- Designed for independent triode operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| A-F Amplifier - Class A (One Triode) | 250 V | 1200 | 8750 | 10.5 | 8 mA |
| R-F Power Amplifier - Class C - Telegraphy (One Triode) | 250 V | — | — | — | 20 mA |
Application Notes
The RK-33 is designed for use in circuits where but one triode is operated at maximum ratings. One triode may be operated as a Class C amplifier or oscillator while the other is used as a low power oscillator, amplifier or detector. At least 15 volts of fixed bias is recommended to protect the tube in case of excitation failure.
0 results