EF73
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BrandMullard
ClassSubminiature variable-mu R.F. pentode
BaseB8D/F
Filament6.3V @ 150mA
Construction
Primary TypePentode
EnvelopeSubminiature
SectionsSingle
Filament / Heater
Absolute Maximum Ratings
Plate Voltage165 V
Plate Dissipation1.1 W
Grid 2 Voltage155 V
Grid 1 Voltage-55 V
Cathode Current16.5 mA
H-C Voltage200 V
Audio Performance
Key Features
- Subminiature
- Variable-mu
- Direct soldered connections
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Controlled R.F. amplifier | 100V | 4500 | 260000 | - | 7.2mA |
Application Notes
Direct soldered connections to the leads of this valve must be at least 5mm from the seal and any bending of the valve leads must be at least 1.5mm from the seal. Should be adequately cooled, e.g., in a metal clip which conducts heat to a heat sink.
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