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BrandRadio Corporation of America
ClassVacuum Phototube
BaseCinch 8JM-1

Construction

Primary TypePhototube
EnvelopeT9
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage250 V
Cathode Current0.01 mA

Audio Performance

Key Features
  • S-5 Response
  • Side-on type
  • Skirted Miniature Cap
  • Semicylindrical cathode

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Anode Supply250V---0.035mA

Application Notes

Averaged over any interval of 30 seconds maximum. Luminous sensitivity measured with tungsten-filament lamp at 2870 K.

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