Kinda of a funny one, kind of a weird one.
I was just putting my Tommy III back in it’s enclosure last night after painting it. With the dpdt up it was all good and working like a charm. But with the dpdt downward there was this high pitched squeel that almost tore my ears of. I took it out of the enclosure again today to have a look and clean it properly. Put it back in and thought eureka, all great! no high pitch squeel. As I was fiddling around playing it my girlfriend decided to vacuum clean. All of a sudden I heard the squeel again and it got louder when she got closer and lower when she moved away again.
I thought I’d try replacing C9 and R12 since those are the only difference between the positions on the dpdt. But does anyone have a plausable explanation as to why this happens?
I was just putting my Tommy III back in it’s enclosure last night after painting it. With the dpdt up it was all good and working like a charm. But with the dpdt downward there was this high pitched squeel that almost tore my ears of. I took it out of the enclosure again today to have a look and clean it properly. Put it back in and thought eureka, all great! no high pitch squeel. As I was fiddling around playing it my girlfriend decided to vacuum clean. All of a sudden I heard the squeel again and it got louder when she got closer and lower when she moved away again.
I thought I’d try replacing C9 and R12 since those are the only difference between the positions on the dpdt. But does anyone have a plausable explanation as to why this happens?