GZ37
1 Tube in archive
ClassFull-wave Rectifier
BaseOctal
Filament5V @ 2.8mA
Construction
Primary TypeFull-wave Rectifier
Rectifier TypeIndirectly heated
EnvelopeGlass (142mm max)
SectionsDouble diode
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage1850 V
Cathode Current350 mA
Audio Performance
Key Features
- Indirectly heated full-wave rectifier
- Octal base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Capacitor input | 300V | - | 75 | - | 250mA |
| Capacitor input | 400V | - | 75 | - | 250mA |
| Capacitor input | 500V | - | 75 | - | 250mA |
| Choke input | 300V | - | 100 | - | 350mA |
| Choke input | 400V | - | 100 | - | 350mA |
| Choke input | 500V | - | 100 | - | 350mA |
Application Notes
Commonly used in capacitor or choke input filter circuits for power supplies.
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