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Original Message
RE: New production 12AX7 for Paragon System E phono preamp
Posted by Eli Duttman on February 5, 2017 at 12:00:50:
Yes about being somewhat microphonic prone. LPS = long plate spiral. ;>) The variant is more of a HIFI than a guitar tube. You can always use silicone or neoprene rubber "O" rings, to tame microphonics.
Make sure that you get phono grade specimens.