[dconant]

I have recapped and replaced out of tolerance resistors and so on. Radio plays nicely on fairly strong stations. The problem is weak stations produce squealing when tuned in. I have touched and moved many wires which make the squeal go away but just moves up or down the scale a tiny bit while still on the same weak station. I have swapped out the oscillator, IF and detector tubes with no change. Grid wire to the detector is inside the tube shield. Like I say the stronger stations don't have this problem. An alignment has been done but noting the antenna trimmer does nothing. Signal generator set very low. Any idea what is causing the squealing?

Thanks,
Dan