Tube-number record
CCH 2
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BrandPhilips Miniwatt
ClassTriode-Heptode Frequency Converter
BaseSide-contact (P-base)
Filament29 V @ 0.2 mA
Construction
Primary TypeMulti-section
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesSeries filament supply; D.C. or A.C.
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1 W
Grid 2 Voltage125 V
Grid 1 Voltage-1.3 V
Cathode Current25 mA
H-C Voltage100 V
Audio Performance
Key Features
- Indirectly heated
- Multi-unit tube
- Controlled transconductance
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Heptode section as frequency converter | 200 V | 750 | 1500000 | — | 3.25 mA |
| Triode section as oscillator | 100 V | 5500 | — | 17.5 | 9.5 mA |
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