alistermorton

The TCA0372 does seem to be fairly uncommon. Neither Rapid nor CPC list it, and Farnell only have the 8 pin dip in stock.

EDIT

Belay that - the 8 pin dip is the one we want, isn't it?

Have you thought about a source of the belt clips themselves?

Looks like they're easily available as spares e.g. http://www.ebay.co.uk/itm/10-x-STEEL-STRONG-METAL-BELT-CLIP-UTILITY-SPRING-CLIP-MONEY-CLIP-MULTI-USES-/251283766330

It mentions adjustable mic gain in the first post. I was very pleased to see it there as I've had just the issue you describe, specifically between the new plastic ASL packs and Metro/Stonewood (and now Granite!) systems.

Yes, I noticed that and thought it meant it was switch selectable i.e. high gain, no bias voltage for dynamic or lower gain and bias voltage for condensor. Brian and Boatman can no doubt clarify. Continuously variable would be nice if it wasn't a problem.

The Canford cans we were using looked remarkably like Stonewood ones, AIH.

This all sounds terrific.

Can I make a couple of late suggestions?

Could the mic gain be adjustable, even if, like is common for side tone rejection, it is via a trimmer. Last week we were at Minack where they had a mix of canford cans and ASL cans and the mic levels seemed to be quite different.

Instead of a "siren", a vibrator as found in mobile phones might be a better alternative.

However, as he design stands , it still sounds excellent, and you are to be congratulated and thanked for such a fine effort.

.....or the OP could just buy or hire a few Selecon Pacifics and print their own multicolour gobos on a desktop printer. Much cheaper and nowhere near as messy as etching your own gobos.

Yeah, but where's the fun in that ;-)