Inside I found that the VHF and UHF tuners were separate modules mounted in their own shielded boxes that hung from the face of the TV by their dials. The VCR had an RF modulator of course but the video quality was always better using composite. Anyway, I wanted to connect a VCR and a game system. It was color but from a time when that was still something to advertise. Reading here it sounds like doing this to the older, pre-menu sets was really hard but in my experience it was anything but.Īs a kid I bought an old tv at a garage sale. Posted in Video Hacks Tagged crt, rgb, tv Post navigation The result is a CRT gaming monitor for retro consoles, of the highest quality.įor those of us who cut our teeth on CRT TVs it’s always good to see a bit of TV hacking. We see a VGA socket on the rear panel going to a resistor network on a piece of protoboard stuck in a vacant space on the PCB, from which a set of lines then go to the signal processing chip. These could be readily hijacked to provide an RGB input, and this is the course taken here. The signal processing chip would usually have an RGB input with a blanking input to turn of the picture during the OSD chip’s output. is in Canada, and has treated us to a bit of old-school TV input hacking as he put an RGB socket on his JVC CRT set.Įarlier hacks had inventive incursions into discrete analogue circuitry, but on later sets such as this one the trick was to take advantage of the on-screen-display features. For Europeans the arrival of the SCART socket gave us ready-made connectivity, but in the rest of the world there was still a need to break out the soldering iron for an RGB input. Then sets with switch-mode supplies made delving into a CRT TV much safer, and we could bodge in composite video and even RGB sockets by tapping into their circuitry. There was a time when all TVs came with only an antenna socket on their backs, and bringing any form of video input to them meant dicing with live-chassis power supplies.
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