7JP4 restore ?

[old_coot88]

Originally Posted by Yamamaya42

from what I have seen, on RCA color sets anyway, the CRT heater windings are already isolated, having their own separate power source on the main transformer, but ARE tied to a pair of resistors to the main bias and ground, so, if a H-K short causes feedback through that or the main power x-former, does sticking a 2nd isolation transformer give better blocking to any HV that may try to bleed through?

It will provide DC blocking, but the added capacitance-to-ground will cause smearing-out of fine detail in the pic (since the luma signal is fed in via the cathodes). Been there, done that.