Reply to thread

Message

<blockquote data-quote="Z1NONLY" data-source="post: 7473721" data-attributes="member: 634086">I had a cold solder joint on a PCB once that had symptoms like that. IIRC it was where one of the RCA&#039;s mounted to the board. I could change the output of the amp just by putting a little pressure on one of the RCA&#039;s. (sidways).The way the RCA&#039;s are on your amp makes the same exact problem almost impossible, but there could still be something lake that going on inside the amp with a different connection point for another component. I isolated my problem when I noticed removing one of the RCA&#039;s didn&#039;t lower the volume sometimes.Also, some of the commercial amps I deal with get &quot;dead spots&quot; on some of the switches that can cause problems with output. I have even seen gain controls get &quot;dirty&quot; on older car amps. (You can hear static as you adjust the pot up and down. In both cases moving the switch/knob through its range a bunch of times usually fixes the problem.</blockquote>

[QUOTE="Z1NONLY, post: 7473721, member: 634086"] I had a cold solder joint on a PCB once that had symptoms like that. IIRC it was where one of the RCA's mounted to the board. I could change the output of the amp just by putting a little pressure on one of the RCA's. (sidways). The way the RCA's are on your amp makes the same exact problem almost impossible, but there could still be something lake that going on inside the amp with a different connection point for another component. I isolated my problem when I noticed removing one of the RCA's didn't lower the volume sometimes. Also, some of the commercial amps I deal with get "dead spots" on some of the switches that can cause problems with output. I have even seen gain controls get "dirty" on older car amps. (You can hear static as you adjust the pot up and down. In both cases moving the switch/knob through its range a bunch of times usually fixes the problem. [/QUOTE]

Verification