I am really not having an easy time with this radio, there have been some changes to the wiring, which means I will need to thoroughly check all the wiring.
Generally where changes have been made, or replacement components have been fitted the solder joints fall away when moved.
The original volume control had a loudness tap. The control has been changed in the distant past and an attempt had been made to modify a Morganite control by drilling a hole at the edge of the track and fitting a small nut and bolt through to a solder tag on the outside.
This was not working, mainly due to corrosion of the brass screw head. I have cleaned and made good with some silver paint, and now have a good connection to the tap.
There is a trimmer potentiometer (VR2 25k) in the neon indicator circuit. I am not sure what this does or how the indicator works.
But the pot was not working, I could not get a connection to the wiper no matter what I tried. So I have fitted a small 50k pot as a replacement.
Mike