Convert a B&W TV to display 1080i?

[electroking]

Originally Posted by peverett

Remember that most of the old B&W crts were designed for a 4 to 6 MHZ video signal, not anywhere near 20 MHZ and up.

Is that limitation actually caused by the CRT itself, or by the conventional
video amplifier topologies, as well as the fact that the audio carrier
is 'only' 4.5 MHz above the video carrier? French 819-line TVs,
with their 14-MHz wide channels, probably used conventional CRTs.