Tube-number record
VARIABLE MU R.F. PENTODE
0 archive entries
VARIABLE MU R.F. PENTODE is a tube type in the TubeDatabase archive (class: RF Pentode). Recorded specifications: brand Mazda, year 1948, construction Pentode, socket Rimlock, and maximum plate voltage 250 V. The archive does not yet hold a photographed example of this type.
BrandMazda
ClassRF Pentode
BaseRimlock
Filament6.3 V @ 200 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated — for parallel operation
Absolute Maximum Ratings
Plate Voltage250 V
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Condition 1 | 250 V | 2300 | 1700000 | — | 7 mA |
| Cut-off (Condition 1) | — | 23 | — | — | — |
| Cut-off (High Vg2) | — | 23 | — | — | — |
Application Notes
In use pins 3 and 4 should be joined and earthed.
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