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Vintage Synth Repair

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ARP Solus thump

2005-09-17 by easterleggs

Another question for you more knowledgable than I:  Could the ARP "VCA thump" I've read 
about on the Omni also apply to the Solus?  If so, does this require a power supply repair 
or a VCA circuit trim pot adjustment?  My Solus makes a loud thump/pop every time fresh 
contact is made between J-wire and bus bar.  It is generally irrespective of ADSR or 
Resonance settings, though a very long attack will mitigate the pop slightly.  Any 
suggestions as to how to proceed with repair?  Thanks--Stephen Nichols

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