ECH3
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BrandPHILIPS
ClassTriode-Hexode Mixer
BaseSide-contact P-base
Filament6.3V @ 240mA
Construction
Primary TypeTriode-Hexode
EnvelopeGlass
Sections2
Filament / Heater
Heater Notesindirect
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1.5 W
Grid 2 Voltage125 V
Grid 1 Voltage-1.3 V
Cathode Current15 mA
H-C Voltage100 V
Audio Performance
Key Features
- Indirectly heated
- Triode-Hexode for frequency changing
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Hexode section as frequency changer | 250V | 650 | 2000000 | - | 3mA |
| Triode section as oscillator | 250V | - | - | - | 3.3mA |
Application Notes
Screen grid supply through a potentiometer (R1, R2). Oscillator voltage approx 8V RMS.
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