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Philips code WAG

R61: R6 = EL37. 1 = type 1.

B6K: B = Blackburn. 6K = Nov 1956 or 66.


AFAIK, Blackburn made some of the finest tubes. Esp their rectifiers. The Blackburn made GZ34 tubes are legendary.

As long as those EL37 rectifiers are strong, do not have loose internals, and quiet... you have a very nice tube. Use it in appropriate circuit and it'll last just about forever.


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Follow Ups
  • Philips code WAG - FenderLover 07:19:40 02/06/17 (2)


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