Tube-number record
RK-33
0 archive entries
RK-33 is a tube type in the TubeDatabase archive (class: Twin Triode). Recorded specifications: brand Raytheon, construction Dual triode, base Isolantite, socket Special / none, maximum plate voltage 250 V, and maximum plate dissipation 2.5 W. The archive does not yet hold a photographed example of this type.
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
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.
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