EL500
0 Tubes in archive
BrandTelefunken
ClassPower Pentode
BaseOctal
Filament6.3V @ 1200mA
Construction
Primary TypePentode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater NotesIndirectly heated, DC-AC Parallel supply
Absolute Maximum Ratings
Plate Voltage400 V
Plate Dissipation20 W
Grid 2 Voltage300 V
Grid 1 Voltage-100 V
Cathode Current220 mA
H-C Voltage250 V
Audio Performance
Typical THD6%
Power Output30 W
Key Features
- Reliability factor P ~ 1.5/1000
- Special quality long life
- Vibration and shock proof
- Interface-free special cathode
- Tight tolerances
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Pentode Measuring Values | 100V | 14000 | 5000 | 5.6 | 100mA |
| Triode Connected | 100V | 14500 | 350 | - | 52mA |
| Push-Pull Class B (2 tubes) | 250V | - | - | - | 94mA |
Application Notes
Specifically designed for horizontal deflection in television circuits. Avoid Barkhausen-Kurz oscillations by choosing Rg2 > 2.2 kOhms.
Datasheet Viewer
Loading datasheet...
Sort by
Showing 1 to 0 of 0 results