Tube-number record
VARIABLE-MU H.F. PENTODE
0 archive entries
VARIABLE-MU H.F. PENTODE is a tube type in the TubeDatabase archive (class: A.C./D.C. Mains H.F. Pentode). Recorded specifications: brand Ediswan Radio (Mazda), construction Pentode, socket Octal, and maximum plate voltage 200 V. The archive does not yet hold a photographed example of this type.
BrandEdiswan Radio (Mazda)
ClassA.C./D.C. Mains H.F. Pentode
BaseOctal
Filament13 V @ 0.2 mA
Construction
Primary TypePentode
EnvelopeMetallised bulb
SectionsSingle
Filament / Heater
Heater NotesA.C./D.C. Mains operation
Absolute Maximum Ratings
Plate Voltage200 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation 1 | 50 V | 2350 | 800000 | — | 7.2 mA |
| Typical Operation 2 | 165 V | 2100 | 700000 | — | 8 mA |
| Typical Operation 3 | 175 V | 2000 | 800000 | — | 8 mA |
Application Notes
Specifically designed for operation in A.C./D.C. receivers employing the loud speaker field winding for smoothing. Recommended for use in super-heterodyne receivers with a Mazda TH.2321 converter.
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