Continuing the metaphor. 2 yearold China-made Peavey i8B Plus mixer amp. No reference to RoHS or PbF as USA company but volcanoes with loads of "caldera" in the making (part formed ring cracks in solder points) . 2 forms of intermittent distortion. Resoldering the usual suspects cured the crackle but not the other metalic triangling and tending to half-complementary waveform diistortion. Could not induce this one however much bashing with biro barrel. Eventually with some long-nose pliers tugging, heating and freezing and vibrating with nylon bolt in an engraver tool, the fault emerged long enough to take some erroneous DC and scoping to determine which
1/4 (1/2 of one ch) where lay the problem and but no closer in than that. Redid all solder points in that 1/4 and ps and not returned since but will it come bouncing back ?then there is the other channel for new failings- posted
13 years ago