DH77
0 Tubes in archive
BrandMarconi
ClassDouble-Diode-Triode
BaseB7G
Filament6.3V @ 0.3mA
Construction
Primary TypeDouble-Diode-Triode
EnvelopeTubular
Sections3
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage250 V
Audio Performance
Key Features
- Miniature construction
- Low microphony
- No internal or external screening
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Triode Section | 250V | 1200 | 58000 | 70 | 1mA |
Application Notes
Equipment should be designed to minimise microphony although inherent order is low.
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