Got a bad case of "roaring surf" from channel 2 (the EF86) channel of my Matchless DC30!
Symptoms include:
1) Volume pot is noisy when it is turned. "Surf" noise increases/decreases with volume.
2) Six-way tone switch makes loud pops when switched. Quality of noise changes in line with tone position, i.e it's bassy in position 1 and gets progressively thinner from 2 thru 6.
No doubt some DC leaking somewhere, so could someone tell me how to test for DC at the pot? As there are no coupling caps between tube and volume pot - the 6 tone caps are the coupling caps I guess - where would the DC be leaking from/to?
Thanks!
Symptoms include:
1) Volume pot is noisy when it is turned. "Surf" noise increases/decreases with volume.
2) Six-way tone switch makes loud pops when switched. Quality of noise changes in line with tone position, i.e it's bassy in position 1 and gets progressively thinner from 2 thru 6.
No doubt some DC leaking somewhere, so could someone tell me how to test for DC at the pot? As there are no coupling caps between tube and volume pot - the 6 tone caps are the coupling caps I guess - where would the DC be leaking from/to?
Thanks!
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