PCC89
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BrandMullard
ClassVariable-mu frame grid double triode
BaseB9A
Filament7.5V @ 300mA
Construction
Primary TypeDouble Triode
EnvelopeGlass
Sections2
Filament / Heater
Heater NotesSuitable for series operation a.c. or d.c.
Absolute Maximum Ratings
Plate Voltage130 V
Plate Dissipation1.8 W
Grid 1 Voltage-50 V
Cathode Current18 mA
H-C Voltage200 V
Audio Performance
Key Features
- Variable-mu
- Frame grid
- Cascode amplifier at frequencies up to 220Mc/s
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Each section | 90V | 12300 | 2900 | 36 | 15mA |
| Cascode | 180V | 12500 | - | - | 15mA |
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