28Z5
0 Tubes in archive
BrandSylvania
ClassRectifier
BaseLoctal
Filament28V @ 240mA
Construction
Primary TypeFull-wave Rectifier
Rectifier TypeFull-wave
EnvelopeT-9
Sections2
Filament / Heater
Heater NotesCenter-tap provided on Pin 4
Absolute Maximum Ratings
Plate Voltage450 V
H-C Voltage450 V
Audio Performance
Key Features
- Coated Unipotential Cathode
- Locking-In 8-pin base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Condenser Input to Filter | 325V | - | - | - | 100mA |
| Choke Input to Filter | 450V | - | - | - | 100mA |
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