The Sinclair QL Forum

Hi everyone A little while ago I picked-up a repaired superHermes and fitted to one of my unexpanded QLs (with Minerva 1.98). At the time, I carried-out some testing of SER3 with its increased range of BAUD rates - connected to QPC on a laptop with native COM port. Curiously, I was never able to get...

Hi everyone Prompted by recent testing of a batch of MDV units and inspired by Dave's recent announcement of a potential replacement MDV board being made available some time soon, I thought to gather together some of my own observations and unanswered questions that have accrued over time around the...

Hi Dave - it's reassuring to hear that the heads are less-likely to be the cause of faults (beyond contact-wear.) Measurements of faulty MDV units during my efforts to reproduce a legible set of signal traces (ala Appendix D5 of the Service Manual - see another thread) indicated that the first stage...

I was thinking something similar - but having researched replacement heads, came up blank.

Seems a lot of extra hassle with the return shipping thing, but very happy for Dave to have my business!

Hi Dave

Given my perverse fascination with our beloved MDVs, I can't help myself but to put my name down for 4 units, please

M.

Hi again Beanz Having just completed a complex repair on one of my own Iss5 QL boards (see separate post from Cristian) - albeit, by undoing some of my own soldering errors - one observation that I document in the other post might prove useful for your investigation here. I won't re-post in full her...

...to err is human

"Mark - something like that

Fortunately having an ego the size of planet allows one to readily forget ones little blunders...

Back to Cristian - looking forward to hearing how it goes!

Well done Cristian - progress indeed! Given how close to fully working and the specific bit-error still present, it does seem likely that one further RAM chip replacement is worth the effort. Good luck :-) +++ If I may sabotage your thread temporarily with the intention that some of the below _might...

That'll do nicely