Ts4d Motorola

[timmy]

Just a question about the ts4d I have it has been recapped but what I was left with is what sounds like a 60 hz hum or buzz in the audio when low but as its raised up the noise disappears . Every cap was replaced and as for the electrolytics I parallel each one, one by one with a high uf to rule out a possible bad cap and I have since been left with the hum or buzz. I am trying to figure out where or what would give me this hum but have been unsuccessful . I thought maybe the verticle but how it would get into the audio I don't know as there are no other caps to change. Other then that noise the set works perfect but would like to know where it's coming from.