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.