TubeDatabase
  • Tubes
  • Testers
  • Companies
  • Submit
  • About

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)
DisclaimerSubmit a tube

Tube-number record

4A

0 archive entries

BrandNational Union Radio Corporation
ClassVacuum Tube

Construction

Filament / Heater

Absolute Maximum Ratings

Audio Performance

Key Features
  • Standard base connections

Application Notes

As this tube is well known to the industry it is not necessary that this committee distribute technical data to the manufacturers.

Filters

0 tubes found

Manufacturers

Brands

    0 results