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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

R78A

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BrandVisitron
ClassGas Phototube
Base4-pin

Construction

Primary TypeOther / special
EnvelopeGlass
SectionsSingle

Filament / Heater

Absolute Maximum Ratings

Plate Voltage90 V

Audio Performance

Key Features
  • Extra large cathode
  • Sturdy construction
  • Constant quality performance

Application Notes

Commonly used in standard theatre projection equipment.

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