Brian

The Rackpak design is very basic. It should take you less than 30 minutes to sketch out the schematic.

In the old days that pretty much how it worked. Penny and Giles faders had microswitches built into them.

But China isn't a democracy: the people do what they are told. Can you really see us Brits staying indoors when told to? But does that insurance, if it pays out, help the myriad of 'freelancers' who now have no work? The contract we have with our insurers, for any sort of insurance, requires us to do all we can to mitigate our losses to keep the size of any claim down. So when a theatre/pub/restaurant is told to close down because of a virus then to mitigate the loss they should lay off all their staff. It's not right but insurance wouldn't help anyone at the end of the chain.

Anything over the front of an LED will affect the radiation pattern as you're making an additional lens. It has nothing to do with how 'clear' the added material looks; it's down to its refractive index.

I would steer well away. The going rate for a typical disco has not changed in the last 20+ years. There are still plenty of people, with thousands invested in kit and vehicle, prepared to go out on a Saturday night for £150. They might call it a business but in reality it's a hobby. And be prepared to replace your equipment regularly as it'll not be looked after. [E2A] To put some context on pricing...many many years ago (25+) I used to run a disco. I have a friend who still does. He has a huge investment in good kit. And yet he struggles to get half of what I was getting when I packed it in.

Can anyone recommend a tester for primary, and occasionally rechargeable, batteries. Things like AAA/AA/PP3. It needs to be one that applies a sensible load and then displays a reliable estimate of remaining capacity. I wouldn't mind paying up to £50 for the right product. I've got one here that needs three hands to use and drives me mad.

And dangerous.

A couple of options... 1) There are a couple of T4A fuses that feed to the +/-15V rails. Check they are OK. 2) One of the power amplifier channels has gone DC 3) There is a fault in either the fan circuit or the transformer over-temperature circuit. 4) There is fault in the protection circuit itself so that it is staying in the power-on mute condition.

Quite so, but it would be interesting to know what proportion are..... Given the number of prosecutions where the defendants are found guilty because their risk assessment is found to be not 'suitable and satisfactory' I'd say that very few are.

Not if done properly. And you're meant to keep them up-to-date.

Isn't the only correct answer to the OP's question "What does your risk assessment say?"

Somewhere on here is a circuit of a call light I posted.

It's likely an OEM unit as opposed to anything generally available.

Do you know if the LanBox is just acting as an Artnet to DMX converter? If it is then you might find it easier just to monitor the ARTnet stream. Plenty of free PC based tools to do that which don;t need any special hardware.

Are you sure? i.e. have you tested it?

...and can prove what they do is safe because the statistics prove it to be so.

I think the answer is probably that they don't. Or rather, the H&S person will be in-house and will understand the hazards and risks. Same as in the UK. H&S is mostly self-managed, it's very rare that anyone 'official' ever turns up to check things.

Doesn't that make you a waste carrier for which a licence is required?

The input resistance of an Alphapack is around 100k. So assuming you want to keep the volts drop to less than 1% you can get away with a cable resistance of up to 1k. Which would be several tens of km.

Maybe they are; maybe they aren't. The units are, however, functionally identical WRT the odd mode required by the OP. Plus they are based in the US like the OP.

Remembered correctly... ...like rocking horse ###### though. Although I do have some sitting waiting for 'that' project. [E2A] How wrong could I be?

Hmmm, a demux or normal relay board won't quite to what Bob wants. He wants to take a single byte from a DMX frame and use it to drive 8 relays: one relay per bit. The old Milford 8-way relay board had a mode that would do that (IIRC).

Hmmm?

Ignore the fact that it's from Soundcraft, as the principles are the same, and have a read of this... thesoundcraftguidetomixing.pdf

Is Trevira (sp?) still easily available? Lightweight, IFR and available in colours.