I'm about 99% sure its a bad cap creating an oscillation, but again, not exactly sure which one. VR4 is the Gain (that triggers the squeal "tone"), VR5 is the Volume for the "Hot" Channel, VR6-8 are the EQ controlls for the channel. I'm suspecting C15 (333mf Cap.) There are several polypropylene capacitors within this circuit. What would you recomend to pull out first to help narrow down my issue?
Thanks.
Thanks.