Sinclair ZX80 / ZX81 / Z88 Forums

RGB SCART uses three channels to carry colour with no separate monochrome signal. The channels are called red, green and blue to correspond with the three election guns in a colour CRT TV. It is possible to convert from RGB SCART to composite video, but it takes rather a lot of electronics, so in y...

The ZX8-CCB has two pots that can be adjusted to get the best picture. This may be enough to get a picture on your monitor? I know this. But what is tuned fine one day, is out of sync the next day. The monitor is very picky. I even have to have the signal through a Composite2HDMI-converter, just to...

I would imagine Pokemon’s ZX8-CCB board will produce a stronger signal than a simple transistor mod and is cheap and easy to install. I have so far bought about 30 of them, I think, for ZX81s I have refurbed and sold on eBay. I have not had any feedback from buyers that they could not get a picture...

I have the same problem. I've connected to a monitor, but it want's very exact video signal input. One thing ZX81 does not give is very exact video signal output. Even though I got Pokemon's ZX8-CCB composite mod, I still have problem with the video. I guess old TVs like the 9" B/W TV I have, may b...

Any one... please?
I tried on other two LCD TV but strangely them tell me "no signal" to composite video input..
So I guess may be something wrong with the one transistor mod??
Thanks...

Hello world :D I have a CZ1000... a rebranded 2k TS1000 ISS-03 with some issues I've posted in the hardware area (waiting for the mods) a pair of 1016 ram packs and a custom handmade ram expansion made by me about 30 years ago :mrgreen: .. That's my kid exploring the past :D (Notebook was used to lo...

You can use and ISA connector from and old motherboard.. and some handwork..

Hi.. I have my CZ1000 since 1984. It's an argentinian rebranded 2Kb TS1000 ISS-3 board still running.. Not without some issues :| .. I have a faulty 16Kb ram pack.. with good voltages but that doesn't post.. after checking it I discovered tha The machine itself won't start any more giving me a wire ...