Tube-number record
RK-10
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RK-10 is a tube type in the TubeDatabase archive (class: Triode Power Amplifier Oscillator). Recorded specifications: brand Raytheon, construction Triode, base Isolantite, socket 4-pin, maximum plate voltage 450 V, and maximum plate dissipation 12 W. The archive does not yet hold a photographed example of this type.
BrandRaytheon
ClassTriode Power Amplifier Oscillator
Base4-pin
Construction
Primary TypeTriode
EnvelopeGlass
Base MaterialIsolantite
Filament / Heater
MaterialThoriated tungsten
Absolute Maximum Ratings
Plate Voltage450 V
Plate Dissipation12 W
Grid 1 Voltage-60 V
Cathode Current65 mA
Audio Performance
Power Output1.6 W
Key Features
- Thoriated tungsten filament
- Isolantite base
- Designed for use as an amplifier, oscillator or frequency multiplier
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| A-F Power Amplifier Class A | 250 V | 1330 | 6000 | 8 | 10 mA |
| A-F Power Amplifier Class A | 350 V | 1550 | 5150 | 8 | 16 mA |
| A-F Power Amplifier Class A | 425 V | 1600 | 5000 | 8 | 18 mA |
| R-F Power Amplifier Telephony Grid Modulation | 450 V | — | — | — | 40 mA |
| R-F Power Amplifier Telephony Plate Modulation | 350 V | — | — | — | 50 mA |
| R-F Power Amplifier Telegraphy | 450 V | — | — | — | 65 mA |
| R-F Power Amplifier Class B Telephony | 450 V | — | — | — | 40 mA |
Application Notes
The plate of the RK-10 will not show color when operated at the maximum rated plate dissipation. At least 40 volts of fixed bias should be used with 450 volts on the plate to protect the tube in case of failure of excitation.
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