EF36
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BrandMullard
ClassPentode
BaseOctal
Filament6.3V @ 200mA
Construction
Primary TypePentode
EnvelopeGlass/Metal
Base MaterialMetal/Plastic
SectionsSingle
Filament / Heater
Heater NotesSuitable for series or parallel operation a.c. or d.c.
Absolute Maximum Ratings
Plate Voltage300 V
Plate Dissipation1 W
Grid 2 Voltage200 V
Grid 1 Voltage-0.6 V
Cathode Current6 mA
H-C Voltage100 V
Audio Performance
Typical THD5%
Key Features
- High gain
- A.F. voltage amplifying
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Characteristics | 250V | 1800 | 2500000 | 28 | 3mA |
| Resistance Coupled Pentode Vb=250V | 250V | - | 100000 | 103 | 2.1mA |
Application Notes
In order to reduce hum to a minimum, the centre tap of the transformer winding should be connected to the chassis. The impedance between cathode and chassis should be as small as possible (<40 Ohms).
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