Adrian Storey decided to use a 5" portable TV–a monochrome cathode ray tube the size and weight of a bag of sugar–as a computer monitor. The first problem: it uses a 3.5mm jack as its sole RF input. There were further problems.
1980s 5″ BW TV connected to a PC as 3rd monitor – Display port to HDMI cable into HDMI to composite video adapter, composite video adapter into old VCR, old VCR RF out into coaxial to 3.5mm mono jack adaptor. Mono jack to TV!!
Achievement unlocked :)
Ultimately the whole exercise was a little pointless