In Reply to: New Quickie Build -- Microphonics posted by induna on October 4, 2009 at 15:31:03:
Yes, it's the tubes. The plastic chassis helps a bit. Using a less sensitive amp/speaker combo will help (see the white paper on the Bottlehead Community page, near the top).
On the prototype we tried copper tape around the tube, with a pigtail to ground even. Didn't help much. I suspect that suspending the tube socket so vibrations don't reach the tube will be more useful than damping the tube envelope - but I figure, this is a really creative and experimental community, the really good ideas will come out on the forum over the next year or two.
Meanwhile, don't tap the chassis plate! :^)
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- RE: New Quickie Build -- Microphonics - Paul Joppa 19:04:09 10/04/09 (0)