Andrew_C

No, no it wasn't. Not even in the top 5 hottest summers anymore. Sure, it was dry (very) and there were 15 days over 32ish. But those days were in August. The weather broke on the Bank Holiday - I was at Thruxton watching Minis racing and spectacularly failing to stick to the track.

Book. Starts slower, more detail of Grace's realization .I think that a lot of his work needs an editor with sharper scissors. I'm fairly sure I said this about "Children Of Time" some way up*. The 3rd quarter could have been cut significantly with little loss, and much more pace. * Read it - it is very good!

Book. Starts slower, more detail of Grace's realization.

<AMAZE>

Nah - there's two three principle systems for speakers. One is your standard HiFi type, scaling up to arena sized boxes. The amp drives the speaker directly. At home you would typically have 8 Ohm speakers. The impedance should match the amplifier (not critical unless you are driving hard). Third would be a system with the amp, ore indeed amps, built into the speaker cabinet. These would require power, and low level signal. But that's not what you've got. For distributed systems, like shops, and possibly classrooms, the amp is connected to a transformer (probably internally) that boosts the voltage of the signal to typically 75 or 100V). The speakers then have small transformers to drop it back down. The transformer may have several taps, with the wattage marked. To size the amp, just total the wattage.

35W in a classroom isn't that shabby. They aren't 100V speakers are they? They'd have a transformer on them if so... Re-read OP. 100W speakers is A LOT for a classroom. You don't have to drive them flat out.

Nasty... Unless we've both misinterpreted that. CPC do offer these - no name, but I've had plenty similar from them over the years. https://cpc.farnell.com/qtx/kad-2/digital-amplifier-2x-35w/dp/DP34982

Something that ought to be said "Microphones aren't magical - they need setting up, and controlling, to get anything useful out of them". A fixed mic on a pulpit or lectern might work most of the time, but handhelds and body worn? No chance!

That's quite a "how long is a piece of string" question... You need to refine your aims. Whitwam in Winchester are VERY good, but you'll pay premium prices.

Why would "new" lenses be an issue? Very unlikely the school is going to need "fancy" stuff anywhere down the line.

Well - yes, it would.

Pointing backwards - spectacular.

We don't have anything at the moment. Camera we're looking at is SDI to the controller, which ideally I want out of the way, then USB to the lectern. I could put a convertor of some sort in the lectern, but it is fairly full already. I'd like flexibility at that end to use either the built-in PC, or a presenter's laptop.

Plasterboard isn't difficult, is cheap, and is massive. Stick some OSB up first, then anything you want to hang on the wall gets screws through the plasterboard into the OSB. Easy.

You need to add mass, ideally isolated from the existing wall, with NO gaps. So, add a new stud wall with thick plasterboard, but everything "floating" on neoprene pads. Oh, and not expecting too much...

That's what I need - but at 1/4 the price!

Avoiding the network, as stand alone as possible. The CAT6 is point --> point; AV rack-->lectern.

I'm looking to install a PTZ camera in our lecture theatre. I think what I want to do is put a converter in the rack in the corner of the room connected to the camera, and running USB-C from it to the lectern where the presenter can connect as a web-cam for streaming. I've seen that Lindy do this - which is almost perfect except the bit where it says:- *Please note: This extender might not support USB devices that require high bandwidths such as FullHD webcams. I already have a CAT6 run, but it wouldn't be too hard to add something else. It may be that the converter has to go in the lectern - but I'm looking for suggestions.

There is one windowsill, in one lab, where the dashed darned things will reset reliably here...

I wonder how an interviewer would field "Yeah sure; I'll tell you, but I want to check out my future team too..."

No. You either use tungsten and dimmers, or self contained LED fixtures. Cheap disco LEDs aren't much use in theatre either. Poor focus control. Good lanterns aren't cheap.

They don't 'dim' nicely in a theatrical context. Nasty stepping as you go down, and then snap off from about 10%. It just isn't what they are designed to do.

You can bet any money you like people will forget to change the plug back.

Include for a DMX merge; one with opto-isolation. Also - would your panel work as "latest takes precedence" or "highest value takes precedence"? ie - half way though a production, someone presses a button on the new control panel, what happens? Some merges are flexible in how this is handled. You need to have some way of by-passing the dimmers, or new non-dim sockets installed for your new LED lights. They way well let out the magic smoke if dimmed externally. You then need DMX distribution to bars/lighting positions. Can all be daisy chained, or active splitters in some form of star topology.

We've just about used the Blutac that we got about 8 years ago; 10 outers instead of packs.