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Tube Database (7,341 tube types · 1,270 archive entries)

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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Tube-number record

D 2

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BrandPhilips
ClassTriode
Base4-pin

Construction

Primary TypeTriode
EnvelopeGlass
Sections1

Filament / Heater

Absolute Maximum Ratings

Plate Voltage100 V
Cathode Current3 mA

Audio Performance

Key Features
  • High vacuum
  • Triode for detection
  • HF and LF amplification

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
LF Amplifier60 V————
LF Amplifier80 V————
LF Amplifier100 V25040000102 mA

Application Notes

Specifically designed for use with a 4-volt battery; requires a 6-ohm adjustable filament resistor. When used as a detector, a plate voltage of 40-60V is sufficient. Can be supplied with various base types, though the standard is Philips 4-pin (A).

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