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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

F 523/1,64

0 archive entries

ClassPhototube

Construction

Primary TypeOther / special

Filament / Heater

Absolute Maximum Ratings

Audio Performance

Key Features
  • Prüfschein (Test Certificate)

Application Notes

Sensitivity measured in µA/lm at a color temperature of 2850 K and a luminous flux of 0.01 lm.

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