D.D.T.
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BrandCOSSOR
ClassDouble Diode Triode
Filament4V @ 1mA
Construction
Primary TypeTriode with two diodes
SectionsDouble Diode Triode
Filament / Heater
Heater NotesIndirectly Heated
Absolute Maximum Ratings
Plate Voltage200 V
Audio Performance
Key Features
- Automatic Volume Control
- Detector
- Double Diode Triode
- Indirectly Heated
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 100V | 2500 | 17000 | 42 | - |
Application Notes
The Cossor D.D.T. is intended for Automatic Volume Control, and takes the form of a triode valve with two diodes all sharing the same cathode. One diode is usually used as a normal detector, the other to provide a D.C. voltage for use in the amplification control.
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