Had this old dog given too me and the squelch dosn't work even at max, After a few mins it will work at max and the longer its left the less i have to swing the squelch control round to its shutoff point, After a long period of time [about 1hr or so] it will work at the 12 position and that is where it will stay, That is until its powered off for a while and the whole process starts again next time.

What should i be looking for, I have the technical knowledge to check for voltages etc, But there is no info on this issue too be found anywhere.

I am aware its a very old radio but apart from this minor issue it does still perform well and would like to get the squelch working properly again.

Thanks