[Ken Kidd]

Hi all, Have powered up the radio and all I get is a loud type buzzing, sometimes get a station, sometimes not like it's getting grounded out. Rechecked everything and have not found anything wrong. Did a continuity test with no power and found out that when the power leads are hooked up both are grounded to the chassis??? Not good. Checked the wire that has the inline fuse on it and it goes to a bracket that is bolted to the chassis. Looked at this piece a lot closer and found that there is a piece of mica between the bracket and the plate that the incoming wire and the wire going to the circuit are soldered to. On the back of the bracket is stamped .0003 500vDC. Think this is my problem. It's marked M7 on the schematic but there is no mention of M7 in the parts list. There must be a break in the mica sheet?? Can I use any type of thin mica and does anyone know what the purpose of M7 is. Apparently the whole unit should not be grounded to the chassis. Any info would be appreciated-Ken