[d smith]

Hi d and wellcome to the phoum
Let me ask you has the set been serviced within the last few years? Could be a number of things, but you've come to the right place to find out what the problem is.
Terry

Hi Terry,

Yes the radio has had a complete overhaul and been recapped. I think all are the original tubes except for the rectifier tube vhich is a new one. could it be possible that one or more of the old tubes may need replacing?