In Reply to: What is the pinging I hear when I first turn on my amps? posted by 2bkurius on December 18, 2011 at 09:29:18:
I would guess that it's the metal contracting and expanding as it warms up.
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Follow Ups
- My Mesh Plate Chinese 300B tubes do this............. - Cut-Throat 10:47:03 12/18/11 (0)