Tube-number record
475
0 archive entries
ClassDuplex-Diode High-Mu Triode
Base6-pin
Filament6.3 V @ 0.3 mA
Construction
Primary TypeTriode
EnvelopeST-12
Sections3
Filament / Heater
Heater NotesIndirectly heated cathode
Absolute Maximum Ratings
Plate Voltage250 V
Audio Performance
Key Features
- Duplex diode section
- High-mu triode section
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A Amplifier | 250 V | 1035 | 91000 | 100 | 0.8 mA |
Application Notes
The 475 is functionally equivalent to the type 75 tube, used as a combined detector, amplifier, and AVC tube.
0 results