Tube-number record
GDT120T
0 archive entries
GDT120T is a tube type in the TubeDatabase archive (class: Trigger Tube). Recorded specifications: construction Other / special, socket Noval (B9A), and maximum plate voltage 400 V. The archive does not yet hold a photographed example of this type.
ClassTrigger Tube
BaseNoval (B9A)
Construction
Primary TypeOther / special
EnvelopeGlass
SectionsTrigger tube with integrated priming light diode
Filament / Heater
Absolute Maximum Ratings
Plate Voltage400 V
Grid 1 Voltage155 V
Cathode Current25 mA
Audio Performance
Key Features
- High current
- Inexpensive trigger tube
- Operation in poor light conditions
- Integrated priming diode
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Standard Primed Operation | 315 V | — | 8200 | — | 25 mA |
Application Notes
Priming diode requires 315 V supply. Light anode connected via 10 MOhm to +315 V, light cathode via 10 MOhm to 0 V. Tubes may exhibit jumps of up to 20 V in operation at low currents.
Datasheets
Datasheet: GDT120T.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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