[morzh]

yes there was a 200uF low voltage cap. I bought some when repairing it and still have those. It is the filament cap I think.

Here's one thing: if any of the tubes plugged in parallel to this cap is removed while the radio is on, or burned out and replaced while the radio is hot, or has been unplugged for a short time, the new tube when plugged in will go "poof!".
To combat that a zener needs to be plugged in parallel to the cap.