3
« on: February 13, 2021, 05:44:36 PM »
This is a new one for me. Been searching the internet to see if anyone else has had this issue, to no avail. Maybe someone here has had this happen to them?
I just fully rebuilt a 200 for a friend of mine. Fresh caps, resistors, new reed bar shield. It sounded great here when he came to pick it up. Clean signal, low noise floor. Until he took it home to his studio and it became a radio. Radio signals coming through as strong as the piano signal. I suggested moving it to a different spot to see if that helps, and it seems that there were some spots in the house that were a little better, but not by much. I took a look at it in person today, and it really was pretty bad. Re-tightening all the ground screws seemed to help, but it also seemed that dang near anything I touched would have a different effect on the noise. Even how close we stood to the piano seemed to affect it. He asked if I could line the lid with copper tape, so we did that and connected it to a ground screw, and that helped a little bit more. So it's more acceptable now, but still noticeable. When he got this thing, it didn't work at all until I rebuilt the amp, so we have no idea if it had this issue before, and the only other place we've heard it working properly without any radio interference was at my place. I did point out that he unfortunately lives less than a quarter mile from some massive radio towers.