I haven't heard of any one who plays with tube and chassis radios in a long time. Back in the 50's I used to assemble Heath kits and Knight kits. I lost interest when printed circuits came out. That was my rainy day hobby when it was too wet under my shade tree. I still do most of my work on my jalopies under a shade tree because we have to maintain our trucks in our shop and I only go out there for special problems. Be interesting to find out how the cliff hanger ends. I have known coils to break down with heat, and I can never remember a condenser in a distributor being intermittent, but there can always be a first. My bet is still on the coil.