My vht head, once in a while, tends to start "shrieking" out of the blue. It does not appear to be caused bad tubes as I've tried two sets of them. Instead it seems to be coming from the last power tube sucket. When it stars shrieking, tapping on the power tubes produces breaks in the shriek, and tapping on the first power tube can eliminate it altogether. Gentle smacks on the (amp's) cabinet are "microphonic" as well. What can this be? dirty connection? can this be handled by a clueless ebonic ball sniffer such as myself?
today i was able to capture it for your listening pleasure. You can hear the reverb tank towards the end of the clip as I'm gently smackin' it, and the shriek stops.
play clip
today i was able to capture it for your listening pleasure. You can hear the reverb tank towards the end of the clip as I'm gently smackin' it, and the shriek stops.
play clip
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