ECH 83
0 Tubes in archive
BrandPhilips
ClassTriode-Heptode
BaseNoval
Filament6.3V @ 300mA
Construction
Primary TypeMulti-section
EnvelopeGlass
SectionsTriode-Heptode
Filament / Heater
Heater NotesIndirect heating; suitable for series or parallel supply
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation0.8 W
Grid 1 Voltage-50 V
Cathode Current6.5 mA
H-C Voltage150 V
Audio Performance
Key Features
- Low voltage operation (6V/12V)
- Intended for car radio sets
- Noval base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Heptode Mixer (Car Radio) | 25V | 450 | 500000 | - | 0.55mA |
| Heptode RF/IF Amplifier | 25V | 1500 | 200000 | - | 1.25mA |
| Triode Section Typical | 25V | 2200 | - | 20 | 2mA |
| Heptode Mixer (12.6V Supply) | 12.6V | 220 | 1500000 | - | 0.17mA |
Application Notes
Primarily intended for use as a mixer in car-radio sets. The tube can be directly operated from a 6V or 12V storage battery.
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