R12
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BrandBrimar
ClassHigh Voltage Rectifier
BaseWire-ended
Filament6.3V @ 90mA
Construction
Primary TypeIndirectly heated half-wave rectifier
Rectifier TypeHalf-wave
EnvelopeGlass
Base MaterialNone (Wire-ended)
SectionsSingle
Filament / Heater
Heater Notes+/- 10 per cent
Absolute Maximum Ratings
Plate Voltage17000 V
Cathode Current0.5 mA
Audio Performance
Key Features
- Low heater consumption
- Wire ended
- No base
- Line fly-back pulse operation
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Sinusoidal Input | 17000V | - | 100000 | - | 0.5mA |
| Pulse Input | 17000V | - | 100000 | - | 0.1mA |
Application Notes
Designed for use in the E.H.T. supply of television receivers. Low heater consumption permits operation from line fly-back pulses whilst the absence of base enables the valve to be wired in close proximity to the line output transformer.
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