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Fisher x-202 b Orginal tubes question

iandoerner

iandoerner

Member
Hi guys,

My question pertains to the origin of the tubes originally placed in the Fisher x-202b. Of the tubes, there are (6) 7025 tubes, (2) 7247 tubes, and (4) 7591 tubes. The 7591 tubes were originally made by the Fisher Corp in the USA. Were the 7247 and 7025 tubes manufactured in Great Britain and West Germany? Does anyone know what the original tubes should look like or where they were supposedly manufactured? Thanks
 
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There really is no rhyme or reason to the (original) tubes you'll find in a Fisher.
Many of the 12A*7 types were Telefunkens, though I have seen Mullard & Sylvania also.
The 7591 power tubes labeled Fisher are generally either Sylvania or Westinghouse (2 of the 3 companies that actually produced 7591's).
 
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