[hsusmann]

I watched your youtube video. It is a bit hard not being there myself to see exactly what is going on but...

Re: the higher plate voltages: what is your current AC line voltage? Modern line voltages are usually higher than they were back in the day. You might try measuring your line voltage and see if that helps explain the difference.

Re: touching the Grid pins. Your probe is probably acting as an antenna. What antenna do you have attached to the radio? If there is no antenna at all then this might make some sense. you should attach a long wire to the antenna terminals if you don't already. Probably 20 ft is OK but 100+ feet going up into a tree is best.

Again, without being there I am shooting in the dark a little on this.

I didn't understand your comments on the 42 tube voltages, perhaps you could elaborate? It's a little hard to read the paper on the video.

Hope this helps!

Herb S.
Ithaca NY