Newsgroups: rec.arts.theatre.stagecraft
Subject: Re: Theater Intercom (orig. post wonked!)
References: 
"Bob Knollman"  writes:

> After the great discussion and suggestions/cautions regarding using frs
> radios for stage crew communications, I am reconsidering and looking for
> other options.
> Does anyone have a source or plans/schematics for an inexpensive and/or
> easily constructed wired system?

Intercom Clone Project presented at http://www.rcrowley.com/intercom/
seems to be the best on the topic I know of.This project is a home-built
"clone" of the industry standard analog production intercom system. 
(i.e. Clearcom, etc.). I have not personally tested this, bit this
seems to be very promising.

For more intercom related information take a look at the links at
http://www.epanorama.net/intercom.html
 
> I am thinking (perhaps) of something that might utilize the readily
> available and inexpensive computer headset/microphones that run $5-$10.

I do nothave any ready plans to give on this. I have experiemented
somewhat with the idea of this. I have built some prototypes on
this line. They still need some working on before being used in
heavy use or published... I built my own designs to be compatible
with the "Clearcom" system and used in in one show together
with existing "Clearcom" system.

> This would allow the crew to provide the headset, and jack it into a
> house-connected ptt switch and headset connector.  Those without the need to
> talk could just plug monitor headsets in, eliminating some of the idle
> chatter/crosstalk problem that causes missed cues.
> 
> Unfortunately, I'm not an electronics guru!  All ideas and suggestions
> readily accepted, with thanks!
> 
> Bob Knollman
> Tech Director
> MNDT
> 
> 

-- 
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at 
http://www.epanorama.net/