"It's interesting that none of my present TVs would tune properly to the RF of the ZX81 but they will with some of the other RF only computers like the Coco 1 and Atari 400? More circuitry in the latter perhaps..."
I'd have no idea about that one, other than I can verify that there was a lot of variability in the video quality of early game & home computer systems. My first machine was a (NTSC) VIC-20 which I ran on a 12" B&W RCA TV set from the late 1970s. It was not all that bad, really - quite legible with those massive characters, but not so great for games or anything requiring color recognition. I was very happy to receive a "proper" S-Video monitor with my C-64, which arrived some two years later. On Sat, Jan 2, 2016 at 8:06 PM, Terry Stewart <terry.stewart2...@gmail.com> wrote: > On 3/01/2016 2:50 pm, "drlegendre ." <drlegen...@gmail.com> wrote: > > > > Thanks Terry, fair enough. =) > > > > Has it been done with the ubiquitous 2N2222A? That one is probably in > > everybody's kit.. it might be even more common than the 3904 > > > > Wondering.. is there a way to re-purpose that Chan. 3/4 switch as an RF / > > Composite switch? That way you'd still have a correct (local) RF output, > as > > well as the Composite video. > > Actually you probably could if you wanted to keep RF. You'd have to make > sure it's hardwired to the right RF channel of course but yea.. > > It's interesting that none of my present TVs would tune properly to the RF > of the ZX81 but they will with some of the other RF only computers like the > Coco 1 and Atari 400? More circuitry in the latter perhaps... > > Terry ( Tez ) >
