CaptnBob Posted March 14, 2007 Share Posted March 14, 2007 I found a couple of these in my spare tube box, and I don't remember much about them, except I got them in Kansas City about twenty years ago, they're marked "Positron," and they were supposed to be hot stuff. Any more information about them? Quote Link to comment Share on other sites More sharing options...
p.dow Posted March 14, 2007 Share Posted March 14, 2007 just reviewed issue 1 volume 1 of Vacuum Tube Valley (1995) in it is a 3 page review of the 12AX7 and there is no mention of anything with a 'K' can you post a pic of your tube ? paul Quote Link to comment Share on other sites More sharing options...
Guest " " Posted March 14, 2007 Share Posted March 14, 2007 yeah, I could not find a "K" either Quote Link to comment Share on other sites More sharing options...
pauln Posted March 14, 2007 Share Posted March 14, 2007 I've seen EH, WB, LBS, etc; never a K; it is still a 12AX7 Quote Link to comment Share on other sites More sharing options...
CaptnBob Posted March 15, 2007 Author Share Posted March 15, 2007 There is the possibility, however slight, that the "K" was only a marketing ploy. Quote Link to comment Share on other sites More sharing options...
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