Tube-number record
GAS FILLED COLD CATHODE TRIGGER TUBE
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ClassTrigger Tube
BaseNoval (B9A)
Construction
Primary TypeOther / special
EnvelopeGlass
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage350 V
Grid 1 Voltage150 V
Cathode Current40 mA
Audio Performance
Key Features
- Molybdenum cathode
- Electrical priming
- Noval Base
- Any mounting position
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| A.C. Operation | 250 V | — | — | — | 40 mA |
| D.C. Operation | 300 V | — | — | — | 20 mA |
Application Notes
The primer discharge can be established by connecting the primer via a 10 MOhm resistor to the anode supply voltage. Starter and primer resistances should be mounted directly on the socket to avoid stray capacitances.
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