The Sinclair QL Forum

Hi all,

Thanks again for all the provided information and suggested mods and improvements. This really increases my interest on the QL! :)
Unfortunately I am currently trying to fix a couple of Dragon32's and I would prefer repairing them before retaking on the QL (which I currently consider fixed ...

Hi Juan,

Actually that lead is an antenna cable connected to my LCD TV which fortunately still has an analog tuner.
However I'm planning to do a home made RGB cable (which I'm now thinking that may have the zener diodes built-in) :)
In that case I would plan to do the upgrade protection based on ...

You'd want the zeners as close to the RGB socket as possible. That way you're protecting the 1377 too. Just from R/G/B/C/V to GND. You could probably do it on the underside of the PCB on the back of the RGB socket.

You're absolutely right. This would be a much safer solution. I'll plan to do it ...

Thank you all for the warm welcome :)

@jivrt - Gracias por los enlaces. No conocía todas esas revistas :D

@Dave - I think the QL will fit perfectly on that computer niche that other 8/16 bits microcomputers did not fill: productivity :) The color pallete is awful, the sound chip is eons from SID ...

Thanks for the guidance.
An ULA replacement is on the way. I'll post the results here (hopefully with the fixed QL) :)

In regards of adding a zener diode to the lines it does make much sense for me after suffering this. I have some protoboards laying around home.
I can create a very simple circuit ...

Hi Dave,

Thanks for pointing out the 8301 ULA.

Bad news: no activity on IC22 pin 30, while there is on pin 31 and 32.
Is it time to find a ULA replacement?

Cheers

Hi,

In my recent attempt to resurrect my QL I've been able to learn and fix it partially, but I still have some way to do, so just hope that someone with more experience and knowledge could help me a bit.
Here are the facts:

- Bought a non-working QL -> Did not even power up (No image on display ...

Hi!

Another one who joins the QL club family!
Never used/saw a QL during my childhood, but being now a computer collector I came across a good opportunity and decided to acquire it.
The first impression was that it looked like so familiar (I've been a 48k+ user since 8), but that was the only ...