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Other (3257), Pre (2314), Power (1030), Rectifier (740)
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872-A / 872

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BrandEimac
ClassMercury Vapor Rectifier
Base4-pin

Construction

Primary TypeRectifier
Rectifier TypeHalf-wave
EnvelopeT-18
SectionsSingle

Filament / Heater

MaterialCoated shielded ribbon
Warm-up Time30s

Absolute Maximum Ratings

Plate Voltage10000 V
Cathode Current1250 mA

Audio Performance

Key Features
  • Shielded ribbon filament
  • Edgewise-wound
  • Large emission reserve
  • High peak-inverse voltage

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Rectifier-----

Application Notes

Mount vertically, base down. Initial installation requires 10 minutes filament operation without plate voltage. 30 seconds minimum warmup recommended for normal operation. Recommended condensed-mercury temperature is 40 degrees +/- 5 degrees C.

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