Tube-number record
EL1
0 archive entries
EL1 is a tube type in the TubeDatabase archive (class: Output Pentode). Recorded specifications: brand Philips Miniwatt, year 1934, construction Pentode, socket Side-contact (P-base), maximum plate voltage 250 V, and maximum plate dissipation 5 W. The archive does not yet hold a photographed example of this type.
BrandPhilips Miniwatt
ClassOutput Pentode
BaseSide-contact (P-base)
Filament6.3 V @ 0.4 mA
Construction
Primary TypePentode
EnvelopeGlass
Sections1
Filament / Heater
Heater NotesIndirectly heated
Absolute Maximum Ratings
Plate Voltage250 V
Plate Dissipation5 W
Grid 2 Voltage250 V
Grid 1 Voltage-1.3 V
Cathode Current32 mA
H-C Voltage50 V
Audio Performance
Typical THD10%
Power Output1.7 W
Key Features
- 5W Plate Dissipation
- Indirect Heating
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Class A | 250 V | 1900 | 80000 | 150 | 20 mA |
Application Notes
Operating grid voltage for 1.7W output at 10% THD is 9.6V eff.
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