Tube-number record
AC2/PEN.DD
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BrandMazda (Ediswan)
ClassDouble Diode Output Pentode
Base7-pin (non-miniature)
Filament4 V @ 2000 mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsDouble Diode Pentode
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation10 W
Grid 2 Voltage250 V
Audio Performance
Typical THD5%
Power Output3.5 W
Key Features
- Common cathode sleeve for diodes and pentode
- Delayed A.V.C. suitable
- Standard 7-pin base
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Typical Operation | 250 V | 8000 | — | — | 32 mA |
Application Notes
The resistance of the grid to cathode circuit should not exceed 1 megohm. A delay voltage of 10-15V is recommended. A resistance of approximately 50 ohms should be inserted in the anode circuit close to the anode pin.
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