Emerson HV problem

[Kiwick]

Hi you all

I 'm just done with the recapping of this nice 1963 Emerson "Forrestal" B/W set (made by Emerson's Italian plant in Florence) now the set works fine, but only for a few minutes, then the HV slowly dies and the raster fades away, while the audio is still working fine.

The set works again after it has been allowed to cool down completely...

what can be wrong? i hope not the flyback...

By the way, this set has a socket for a wired remote control and has a motorized tuner and volume control.

Francesco