Tube 3HA5 or Röhre 3HA5 ID4380, Triode, vacuum, Miniatur-7-Pin-Base B7G, USA 1940 and shown. Radio tubes are valves.
The 3HA5 is a miniature triode designed particularly for service in VHF television tuners as a grounded-cathode radio-frequency amplifier. Except for heater ...
Jul 28, 2013 · Anybody know what these tubes were used for? Are they TV tubes? Can they be of any use for audio applications? Thanks.
Tube Data Sheet Locator.