Tube-number record
28Z5
0 archive entries
28Z5 is a tube type in the TubeDatabase archive (class: Rectifier). Recorded specifications: brand Sylvania, year 1942, construction Rectifier, socket Loctal, and maximum plate voltage 450 V. The archive does not yet hold a photographed example of this type.
BrandSylvania
ClassRectifier
BaseLoctal
Filament28 V @ 240 mA
Construction
Primary TypeRectifier
Rectifier TypeFull-wave
EnvelopeT-9
Sections2
Filament / Heater
Heater NotesCenter-tap provided on Pin 4
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Condenser Input to Filter | 325 V | — | — | — | 100 mA |
| Choke Input to Filter | 450 V | — | — | — | 100 mA |
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