Tube-number record
VARIABLE MU R.F. PENTODE
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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
Grid 2 Voltage250 V
Cathode Current10 mA
H-C Voltage150 V
Audio Performance
Key Features
- Variable Mu
- Indirectly heated
- Internal shield
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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