Members ken361 Posted July 9, 2009 Members Share Posted July 9, 2009 I asked doug on the penta 12ax7m and his quote "The tone is excellent" how does it sound next to the groove tube M tube?? I just picked up a used telefunken so Im good for awhile lol. The tech- tube is interesting though! coming out of the blackburn plant, like to see it in the US soon!! Link to comment Share on other sites More sharing options...
Members solarburn Posted July 9, 2009 Members Share Posted July 9, 2009 I asked doug on the penta 12ax7m and his quote "The tone is excellent" how does it sound next to the groove tube M tube?? I just picked up a used telefunken so Im good for awhile lol. The tech- tube is interesting though! coming out of the blackburn plant, like to see it in the US soon!! Did you check the GP thread out? QC problems... Here are a couple more comments on some problems with TechTubes: http://www.marshallforum.com/workbench/6867-techtube-new-valve-company-old-mullard-factory-blackburn.html#post49013 Quote below is for the new TechTubes: Also, if you read the spec sheet, you can't use one of these new tubes in an amp with other 12AX7's. Due to the heater design, all of the tubes have to be replaced, or else you can burn the heaters out of the new tubes. What's that all about??? Link to comment Share on other sites More sharing options...
Members ken361 Posted July 9, 2009 Members Share Posted July 9, 2009 yeah i see thats crazy Link to comment Share on other sites More sharing options...
Members leadfootdriver Posted July 9, 2009 Members Share Posted July 9, 2009 Aren't these just rebrands? Link to comment Share on other sites More sharing options...
Members leadfootdriver Posted July 11, 2009 Members Share Posted July 11, 2009 Aren't these just rebrands? Chinese rebrands, yes, or no? Link to comment Share on other sites More sharing options...
Members FastRedPonyCar Posted July 11, 2009 Members Share Posted July 11, 2009 So then if Ruby are supposed to be the top choice Chinese tubes and so are Penta Labs = same tube ?!? Jumping to conclusions, I like the yellow of penta labs The AC7's whip all 4 of my pentas in terms of quietness, punch and cleanliness at stage volume. Link to comment Share on other sites More sharing options...
Members Radiohead, lol Posted July 11, 2009 Members Share Posted July 11, 2009 I asked doug on the penta 12ax7m and his quote "The tone is excellent" how does it sound next to the groove tube M tube?? I'm wondering about this...think I have two of the GT 12AX7M's left to compare to. Not sure about the heater thing with the Penta 12AX7M's though. Suppose they're worth a try at least. I got my ruby 12AX7AC5 HG+s the other day, will have to try them against the other chinese 12AX7s I have. Also, anyone know what the 7025F is? Link to comment Share on other sites More sharing options...
Members ClutchX2 Posted July 11, 2009 Members Share Posted July 11, 2009 Tried them today in my Diezel and my 6505. They sound like the regular Chinese Silver Dragons to me. Link to comment Share on other sites More sharing options...
Members solarburn Posted July 11, 2009 Members Share Posted July 11, 2009 I'm wondering about this...think I have two of the GT 12AX7M's left to compare to.Not sure about the heater thing with the Penta 12AX7M's though. Suppose they're worth a try at least.I got my ruby 12AX7AC5 HG+s the other day, will have to try them against the other chinese 12AX7s I have. Also, anyone know what the 7025F is? The heater quote above was for the new TechTubes not the penta or Ruby's. Link to comment Share on other sites More sharing options...
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