Brian

All rectification and regulation is done in the desk. The 48v phantom supply is made with a bit of capacitively coupled voltage doubling.

So, no clear instructions. Meaning its CE mark is invalid. Meaning that if you imported it directly you are about to break the law (and invalidate your insurance). Or if you bought it from an EU based organisation then they are breaking the law. Apart from breaking the rules on CE marking you might want to look at what sections of the HSWA via PUWER has been broken. There's a very good reason such units are cheap.

Very unlikely. And if it did not in a way that would cause the problems you are seeing. Prospective Shortcircuit Current It's a figure, usually in the 1000A plus range, which indicates how much current your mains supply can deliver when it's short circuited. If you're at the end of a long piece of cable the resistance of that cable will reduce the PSC. If you're right next door to a substation then it'll be higher. If you have site electricians, or can arrange it next time an electrician is on site, it's a fairly easy measurement to take. Measured at the connection point for the dimmers it might give you an idea of what is going on. Do you have these dimmers installed on any sites where they don't exhibit the problem?

I've not come across the 610s. I've used plenty of others including loads of betapacks without problems. It does seem very odd.

Odd, I don't think I have ever lost a triac in a dimmer rack.

I've seen fault current figures for a PAR64 of around 140 Amps; limited only by the impedance of the mains supply.

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Electrics Relevant To Backstage Institution of Electrical Engineers Code of Practice for In-Service Inspection and Testing of Electrical Equipment http://images-eu.amazon.com/images/P/0863418333.01.MZZZZZZZ.jpg ...code of practice for the in-service inspection and testing of electrical equipment. It includes advice on compliance with health and safety legislation. The text specifies the frequency and scope of inspections and testing in different environments. Institution of Electrical Engineers Guidance Note 3 to IEE Wiring Regulations BS7671: Inspection and Testing http://images-eu.amazon.com/images/P/0852969910.01.MZZZZZZZ.jpg A guide to electrical inspection and testing. Institution of Electrical Engineers Electrical Maintenance (Code of Practice) http://images-eu.amazon.com/images/P/0852967691.01.MZZZZZZZ.jpg ...provides guidance on the legal responsibilities as well as full technical support for technicians and electricians, including inspection and test requirements.

This FAQ is now replicated, extended and superseded by the one on the Blue Room Wiki, here. The Blue Room Sound FAQ Looking for Secondhand Audio Equipment? 1. You've tried Google and it's friends? No, well stick 'secondhand audio equipment' into a search engine and prepare to be amazed at how many results you get. Narrow it down by adding your country, region or nearest large town. 2. e-bay is full of the stuff. 3. Failing the above, here is a list of a few regular dealers in professional audio equipment, it's by no means complete and biased towards the UK... 10 out of 10 AC Lighting Adlib APR Audio Bob Kelly Bonza Entec Intasound Larking LMC Audio Orbital Sound SSE Stage Electrics Tega Used Lighting Used StageSound ...if you know of any more who regularly have equipment for sale then let us know. Looking for the Pin Out for a Connector? Tom Baldwin's Site Looking for a Sound Hire Company? Visit our Friends at Stagelink Computer Based Playback anyone? See Computer Based Playback. Where can I get sound effects? Users should check any relevant licensing they need is in place if planning to use any effect in their shows. See Sound Effects. Microphones Shure's Theatre Guide (1.5Mb PDF File) Loads of other Stuff on the Shure Website Radiomic Licensing JFMG who deal with licensing radio mics This post summarises the situation as March 2006. Minidisc Minidisc recorders are getting rarer and rarer. A good unit which is still available is the Tascam MD-350. Recommended Reading Click here to go to the Recommended Reading topic. What sound equipment should I buy / hire for my school / college / church / village hall / other small venue or system? A number of ideas and opinions on this subject can be found in the following threads... speakers and amps PA Advice Radio Mics? Amps And Speakers, good quality second hand stuff Looking For A New Desk Small desk, 4-5 channels, **cheap**, help? New Kit - Suggestions please, Merged Budget sound, Good sound on a small budget Suspending/Flying Mics New mixer advice, £200 - £250 sound hire, education Live PA Mixing Desks?, Freind Starting out needs Advice PA Mxing Desk, Serious advice needed.. A New PA, What to go for? Radio mic advice Best value dynamic wired mics? Recording A Choir, What kit do I need? PA system for school Live Band sound, in a 200 capacity hall New Pa advice needed, What do you think we need? 150w-200w small speakers? Radio Mics, Revisited Advice needed, FA101 and other equipment... Microphone help mixer advice, what should I buy? Micing for school play, just to check again Sound for a band, HELP Active speakers for a small school, Suggestions please? £4000 What to buy?, A new PA for my School Buying small PA System 12-16 channel mixer, Budget £400-£500 for a church tiny mixers Sports Halls Best value radio mic kit, What to buy?! Small mixer for connection to Mac, Music facility PA system for Contemporary church How much power? digital snake for house of worship help Choice of general cover mics, Overhead/Boundry/Rifles? All in one PA units, Wireless mic, input for cd UHF radio mics…, Which system for around £230 ex vat? Having Your Own Gear Church PA Equipment, What to buy to expand with 1.2k Small pa for solo musician Looking for reliable CD- Deck, for school Computerised Sound, What can we get for £800? Digital Sound desk for school, Some advice please Help with improving venue acoustics, Damping reflections Small Monitors what mixing desk? Seeking advice: interesting charity sound installation 70W - 120W Amplifiers Recommendations for installation and accoustics, Church redevelopment project will involve some serious work Mixing desk, which one? If you have any suggestions for more useful information then please PM me.

The problem with irising (is that a real verb?) down a spot is that you are throwing away light. Close the iris to half the open diameter and you waste 75% of the light so you may as well use a 150W lamp the right size.

I've just made myself some specials for mirror balls using PAR56 marine searchlights, 12 volt 100W very narrow beam lamp. I bought some cheap PAR56 cans and bolted them to the top of a metal box containing a 12v transformer. Mains enters the box on a standard 15A plug.

ELCB = Earth Leakage Circuit Breaker. This term should not now be used as strictly speaking it refers to the 'old' way of detecting earth currents. The earth wire of the circuits being protected used to run back to the ELCB where it would feed through a senstive coil, the other side of which connected to the real brown earth. Any fault current flowed through the coil causing it to trip the mains. The problem was that the earth circuit was not continuous (it went through the ELCB) and it had a high resistance, caused by the coil. RCD = Residual Current Device. Works by putting the Live(s) and Neutral through a coil which detects any imbalance in the current flowing out (live) and back (neutral). If there is a difference then that current must be going somewhere where it shouldn't so it trips. These are better as the earth is a nice low resistance continuous circuit. MCB = Minature Circuit Breaker. An overcurrent protection device. RCBO = RCD and MCB in the same lump. RCCB = NRA (Not a Real Acronym)

An RCD is protecting against earth leakage - so will only trip when you have an earth fault I wonder if what he has is an RCBO - a combined MCB (circuit breaker) and RCD? A point which many people overlook. On the other hand, IIRC, a US 13A fuse is rated to blow at 13A.

You need to make yourself an adaptor which lets you put the clamp around just the live wire. Basically a short 13A plug to 13A socket lead but wired in single core cables. BUT make sure you use double insulated cables of the correct size. If you don't know how to do it, get an electrician to do it for you.