Yes very useful ! Many thanks.
I am going to get the Bush back on the bench first and put some power through the overwind. Then I will see if I can find out what is wrong with the Murphy .
What is the best method to warm up the overwind?
I have got a mains transformer that I think is around 20/24 Volts secondary will that do ? Should I use AC or rectify it or doesn't it matter?
Rich.