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

Other (3,257 tube types), Pre (2,314 tube types), Power (1,030 tube types), Rectifier (740 tube types)
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Tube-number record

GD85M IS

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ClassMiniature Reference Tube
BaseMiniature 7-pin (B7G)

Construction

Primary TypeOther / special
EnvelopeGlass Miniature
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage115 V
Cathode Current10 mA

Audio Performance

Key Features
  • Miniature
  • Voltage Reference
  • Reference Tube

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Running85 V—450—6 mA

Application Notes

Equilibrium conditions are reached after three minutes' operation.

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