Hi All;
It looks like the 10BP4 that came with this set is no good.. I will need to check further, but after about 5 minutes of being on, the Picture Tube is still cold, and everything else nice and toasty.. But the good news is that there is no Arching and no purple horizontal tube..
I will need to dig out the 8T243 and borrow its 10BP4 Picture Tube..
THANK YOU marty