The Sinclair QL Forum

It's a while ago now, but I seem to remember there were some 'bodges' for various programs which I think included Qliberator, but the reset mechanism used by Minerva is slightly different, and you may need to account for that. There's some good documentation that comes with Minerva that should be ab...

The last event I went to for the QL - Stuart Honeyball was demonstrating the trump card! That was in London in the late eighties or possibly very early nineties!

I manged to get a flight sorted to Koln, no rooms available at the venue hotel, [...] That is very surprising. From what Detlef told me, they should have plenty of rooms free that weekend. If you can still cancel the other hotel, better contact Detlef and let him check back. Fantastic that you can ...

I manged to get a flight sorted to Koln, no rooms available at the venue hotel, but I'm booked in at a hotel down the road, so will be arriving Thursday and going back Sunday Evening. Wondering if it's cheaper to get trains and taxi's or book a car at the airport as it's only just up the road. It's ...

Excellent development - I would also like to pledge my interest in this - but as there is no list - I will await it's launch. My passport needs renewing by June, so given the new rules, I won't be able to attend either, but I wish you all well in the conference in Germany and a very happy time!

I have to say - that's one impressive looking VCR !

And Kudos for getting it all working again - I think mechanically they are as complex as electronically!

It should stay triggered once you have raised the gate above the cathode voltage, and only reset once the current flow in the Anode to Cathode circuit has gone close to zero. The resistance reading between gate and cathode seems very low, it's normally equivalent to a diode, and as it's a thyristor ...

If you have a multimeter with a DC input voltage rating of 500v or higher - you should be able to measure across the main capacitor - on DC voltage range - you should see some 350-400V. You could also check the stripe (cathode) side of the rectifiers on the secondary side - these should give some in...

I think the wave forms and voltages may not read well on a multimeter. A scope will be the best way to read these voltages - assuming your probes and or scope inputs have the correct rating to check these - as you are dealing with quite high voltages here!

Yes - provided the main capacitor on the primary side is ok, and the bridge rectifier - you should see the full wave voltage from the mains across it - so it will around 380-400v - for a 230/240 V mains supply. It's not that critical as the power supply works down to 110V by the looks of it. The cap...