Quote: Originally Posted by fogmachine /img/forum/go_quote.gif it just made sense, if your planning on building something like this and there is that much help, suggestions, issues etc all ready documented, make the most of them or at least use the search function and stop asking the same questions over and over again! tbh i'm surprised some of you are still replying to some of the questions that have been asked soo many times already. </snip> I agree... but still nearly 350 pages !! Quote: Originally Posted by fogmachine /img/forum/go_quote.gif </snip> right back to the breadboards, got a birdsnest to unpick, looking forward to see how much the 12sr7gt glow, both 12au7 and 12ax7s dont glow nearly as much at the 19j6's, but of couse its not all about how it looks cheers for the help, my initial guess was to ground them, but is always good to check. thank you head-fi'ers No problem... so I take it you've already built prototypes with those three other tubes? cheers!