EF74
0 Tubes in archive
ClassPentode
BaseB8D/F
Filament6.3V @ 200mA
Construction
Primary TypePentode
EnvelopeSubminiature
SectionsSingle
Filament / Heater
Heater NotesTo reduce the possibility of hum the heater should be operated from d.c.
Absolute Maximum Ratings
Plate Voltage175 V
Plate Dissipation0.9 W
Grid 2 Voltage175 V
Cathode Current10 mA
H-C Voltage100 V
Audio Performance
Key Features
- Low microphony
- Subminiature
- Long life
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode | 100V | 3400 | 200000 | 28 | 7mA |
Application Notes
Direct soldered connection leads must be at least 5mm from the seal. Cooling: In operation this valve must be cooled. Recommended method is to mount the valve in a metal clip which will conduct the heat away to the chassis.
Datasheet Viewer
Loading datasheet...
Sort by
Showing 1 to 0 of 0 results