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    Working in the industry
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    Sound and lighting mainly for conferences, some live bands and theatre. Also other technical activities in environmental control.
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    To be found somewhere South in "Spain"

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  1. ElectricTuna: What you describe are two, possibly related issues... From memory (20 years - diagram not available, see previous post - and pending a look at my antique...) The channels are outputted via an internal serial analogue stream that is selected for output via cmos 5051 analogue switches logic switched & synched to the stream (demultiplexed)....and then sample and held for output... Some thoughts: 1 faulty digital to analog converter, locate ( ! ) check data there and output with scope of some sort... 2 cross talk/fault in logic that ties cpu outputs to address of channels & data for converter 3 Lo order addesses being fed into serial data line ? At this point.in time some of the programmable array logics (if used) might also loose programming or even the ROMs, not to mention dry joints, corrosion... PLAs are also used in effects and it was always difficult to tell owners the bad news when repairs cannot be done since they are a factory exclusive Ítems. (ps rambling answer from friend's horrible virtuall tablet - long live real tactile neanderthal desks and keyboards !)
  2. What does not work on your RQ30 ? Avolites had a full service schematic for the desks... However, over the years the compamy evolved and went entirely digital (hidden PC Boris etc based...possibly losing or hiding their heritage and ingenuity) and ignored my emails requesting a manual (It is ironic they sent me one when I was negotiating a purchase in the 80's, and ethically returned it when the deal was unviable where I work ! ) My RQ60 puffed smoke the last time I plugged it in and time is in short supply... possibly just a shorted capacitor. Just as I hate typeing on a friend's tablet surface - so many events need the direct feel of a fader for on the fly action - just what I used last weekend with a music etc. event which was TOTALLY unpredictable, not one chase needed, only ambient and sensitive area levels to focus the public's attention... and YES all lighting was LED 3,4,6 channel controlled from a Sirius 24 ! ! (PS f.w.I.w. the floppy on the RQ was lo density 3,5" single show per disk.)
  3. To #ianl: I think you would have to borrow DrWho's Tardis: I am near Africa and I can just see the airport desk attendant looking at the case and working out how many time your luggage exceeds the pre-paid size/weight! PS #timsabre it is not a Rolacue Pearl (thank you for idea): we are talking vintage here... One chase at a time of ten, editing channel by channel per step/memory (if you modify), but Plenty of Rolacue-memories and a disk drive (one show only)! Makes you think.
  4. Two points on this "old· thread just to cause a few moths to fly: 1. Guest_lightnix_* said: "Old lighting desks are a bit like rare sports cars and hold the same kind of appeal for some of us. Their history..." Yes, as a youngster I bug-eyed Avolites Rolacue 60s etc. at university and bought a working one about +/- 20 years later!!! That woodwork, the size, the pose value... Brilliant for busking specials and PARs till moving lights and LEDS perhaps its- time to interface a PC kit with USB VGA GPS DVD etc. or grow up! Will dig out the Serial number sometime; maybe it lit the Clash or Slade ... not quite Quo, Bowie, ELO, Queen size ! 2.The IMPORTANT QESTION; The Rolacue has/had a mysterious 25 pin DIN connector on the back: was that the DMX Pro-Patch output ? Analog Socapex is evident - we multiplex converted to DMX it when needed...
  5. I think this is a good point although... I think what you mean is that when the choke saturates it will become a lower impedance as it becomes purely resistive at that point. Net result is the same - less impedance in the way -> higher fault current. The opposite would be the case the rush of current would in fact be filtered since it is a "high" frequency occurence in contrast with the normal 50Hz mains load.
  6. The other item that should be in line inside the dimmers is a choke. I have not had the opportunity of disecting one this model, so: do they have one, if so at least what size is it, how many coil turns are visible, what shape ... ? The dark world of inductors and maths associated leads to a basic comparison on these parameters. Why do I refere to the choke ? Becuase in a short circuit fault situation the intensity will lag behind V and it will also saturate causing a higher Z. (I stand to be corrected on this explanation but dimmers with butch chokes seem to survive more torment :D )
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