goingdownslow Posted June 7 Posted June 7 (edited) I have a fault on my SVT 3pro that is similar to what you would get with dirty in/out sockets. I have cleaned the contacts on the sockets thoroughly, even tried linking them with a patch lead but to no avail. I know it is on the power amp section as I have tried different pre/power amp permutations. It does not always do it and it seems to do it more on low volume. A quick flick of the volume control up and down cures it for a while. It is not the bias. There is one more set of contacts, and I have had a problem with this on a hifi amp which was cured by cleaning, and that is the speaker relay. Has anyone had this problem with a speaker relay? It looks a bit fiddly to get at and pop the cover off but I will attempt it If I can't locate the problem elsewhere. Edited 6 hours ago by goingdownslow Quote
lemmywinks Posted June 7 Posted June 7 If the turning the volume knob makes a difference (albeit temporarily) then some contact cleaner in that potentiometer would be my first port of call. Quote
goingdownslow Posted June 7 Author Posted June 7 1 hour ago, lemmywinks said: If the turning the volume knob makes a difference (albeit temporarily) then some contact cleaner in that potentiometer would be my first port of call. Tried that to no effect. However, when used with another pre-amp plugged in to the power amp the Ampeg volume pot is not in circuit. Quote
Hellzero Posted June 8 Posted June 8 It could also be a dry solder, which is kind of a nightmare to find, so the only easy thing to do do is make new solders everywhere. It's not that long to do, but it's a bit of a pain in the derrière to do. Quote
goingdownslow Posted 6 hours ago Author Posted 6 hours ago Just thought I'd update this topic. After cleaning the contacts on the speaker relay the amp has been performing without problems. 1 Quote
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