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In Reply to: Re: 1950s Heerlen 12AT7 - see pic THANK YOU!! posted by waldenpuddle on April 30, 2007 at 11:48:03:
Both are EL84's, Blackburn Production.
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Follow Ups
- rX and kM = EL84 tube type - tubemonger 10:47:12 05/02/07 (0)