Tube-number record
ML-2C39A
0 archive entries
ML-2C39A is a tube type in the TubeDatabase archive (class: UHF Planar Transmitting Triode). Recorded specifications: brand Machlett, construction Triode, and maximum plate voltage 1000 V. The archive does not yet hold a photographed example of this type.
BrandMachlett
ClassUHF Planar Transmitting Triode
Construction
Primary TypeTriode
EnvelopePlanar
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage1000 V
Cathode Current133 mA
Audio Performance
Power Output20 W
Key Features
- Planar electrode structure
- Phormat Cathode
- Mesh grid
- High thermal stability
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class C Grounded Grid | 400 V | 22500 | — | 100 | 100 mA |
Application Notes
Designed for UHF operation up to 2500 mc/sec. Electronic efficiency is 50% of low frequency value at high frequencies. Requires regulated filament voltage and good cooling for long life.
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