It's not an issue for capacitors. Even when you bypass the voltage regulators on the QL and expansion cards, the smoothing capacitors on either side of the regulators are still in play.
Dave On Sat, May 3, 2014 at 3:12 PM, Ralf Reköndt <[email protected]>wrote: > I once had a kind of Mini-PC case, where I fitted a powersupply, an issue > 5 board and a kind of backplane (with 6 plugs), unpowered with a separate > left whole in the case to plug a QEP III into it (connected with a separate > cable). The backplane was fitted with an SQB 513k plus an QFlash 64k EPROM > card. All has worked well without problems. I always wasn't unsure about > separate power or capacitors for such a backplane, of which I have read. I > had none of that and I never run into problems. > > Cheers...Ralf > > ----- Original Message ----- From: "Rich Mellor (RWAP)" < > [email protected]> > To: <[email protected]> > Sent: Saturday, May 03, 2014 9:42 PM > Subject: Re: [Ql-Users] QL backplanes.... > > > > I no longer use a QL with a back-plane - when I did have that set up it >> was to >> use an Aurora, Super Gold Card and QubIDE in a PC Tower Case. >> >> I also liked to have a spare slot for access to a QEP III for example >> (although >> I never had one at the time)... >> >> The main issue now is that ATX cases (for which this combination was >> designed I >> think) are now hard to find. >> >> The main problem I used to have with that original set up (and with other >> backplane setups I have looked at) was how each card is fitted into the >> backplane - typically with nothing to support them other than a bit of >> cardboard >> between each board, or maybe some plastic toothed strips which it was not >> always >> easy to attach onto the edge of the boards (due to chips near the edge) >> and >> quite often fell off in transit... >> >> On May 3, 2014 at 6:50 PM Dave Park <[email protected]> wrote: >>> >>> >>> I tried to start a discussion earlier on >>> QL forum about >>> QL backplanes, and asked people to send photos of their systems and tell >>> me >>> how they used them, and what factors made their decisions... I got a very >>> poor response of zero to th >>> at >>> request. :) >>> >>> I have decided I phrased the question too narrowly. The area I am looking >>> at is much wider than my question, so I have decided to rephrase the >>> conversation in a new thread. >>> >>> QL2 looks like it will have some built-in expansion, possibly including >>> two >>> or three pre-decoded areas. It will need to be able to work as a swap-out >>> replacement for QLs or Aurora in cased systems, while still fitting in >>> the >>> footprint of the original QL board so it can fit in a QL case. This >>> implies >>> an edge connector like the QL's own... >>> >>> Given the generally poor signal quality of the Qplane, and the (some say) >>> uncomfortable layout of the Mplane, and the slew of new hardware soon >>> looking for a spot in systems that are already full, I have to consider >>> the >>> possibility of a new backplane learning lessons from everything currently >>> existing. >>> >>> I asked my question in the light of the above. I was hoping to learn >>> what's >>> important and what's not to most people. >>> >>> This doesn't just feed into a maybe new backplane, but also feeds into >>> the >>> ultimate design and expansion possibilities of QL2 itself. >>> >>> So, what do you think about expansion? What's the deal with your set-ups? >>> What would you like to improve them? >>> >>> If you are both here and on QL Forum, please reply there: >>> http://qlforum.co.uk/viewtopic.php?f=2&t=951&p=7631#p7631 >>> >>> Thanks! >>> >>> >>> -- >>> Dave Park >>> Sandy Electronics, LLC >>> [email protected] >>> _______________________________________________ >>> QL-Users Mailing List >>> http://www.q-v-d.demon.co.uk/smsqe.htm >>> >> Rich Mellor >> RWAP Software >> www.rwapsoftware.co.uk >> www.sellmyretro.com >> _______________________________________________ >> QL-Users Mailing List >> http://www.q-v-d.demon.co.uk/smsqe.htm >> > > _______________________________________________ > QL-Users Mailing List > http://www.q-v-d.demon.co.uk/smsqe.htm > -- Dave Park Sandy Electronics, LLC [email protected] _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
