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BrandRCA
ClassBeam Power Tube
BaseJohnson No.122-105
Filament6.3V @ 3400mA
Construction
Primary TypeBeam Power Tube
EnvelopeT16
Base MaterialSeptar
SectionsSingle
Filament / Heater
Heater NotesUnipotential Cathode
Absolute Maximum Ratings
Plate Voltage1350 V
Plate Dissipation80 W
Grid 2 Voltage425 V
Grid 1 Voltage-300 V
Cathode Current340 mA
H-C Voltage135 V
Audio Performance
Power Output270 W
Key Features
- Forced-air cooled
- Linear RF Power Amplifier
- Single-Sideband service
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| AF Power Amplifier & Modulator - Class AB1 (ICAS) | 1250V | - | - | 8 | 370mA |
| Linear RF Power Amplifier - Single-Tone Modulation (ICAS) | 1250V | - | - | - | 185mA |
| RF Power Amplifier Class C Telegraphy (ICAS) | 1250V | - | - | - | 250mA |
Application Notes
Forced-air cooling is required from a small fan to prevent exceeding maximum bulb temperature of 250 C.
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