On Friday 30 March 2007 19:24, Jason Aron wrote: > I'm a hardware guy with lots of experience in building > radios and audio systems (RF and audio).
I just had another idea ... Equipment for low-power FM radio. Some of these stations are on a very low budget. Commercial broadcast equipment is very expensive because of low volume. This is where the free/open-source approach, with kits for sale, has a place. Before someone else points this out ..... Unless you want it just to prove you can do the whole thing free/open-source, certain things like CD players don't make sense. Whether a mixing console makes sense or not depends what you want to do. If a disco or band mixed does the job, you won't beat it. The free/open-source modular approach opens up the possibility of building big ones like API makes. That would be worth doing. I see a few possibilities ... -Test equipment: modulation monitor, frequency meter. A box that tells you that your transmitter is working correctly. - signal processing, compression and limiting. You can buy one cheap that was designed for bands, but it is far from optimal for broadcast. How about a multi-band limiter for FM? (yes ... I do know how to do it.) (for the USA) .. emergency action notification system. Broadcasters need to monitor other stations for the alarm. It's just an FM radio with a little extra circuitry. How about the extra box to attach to an ordinary FM radio? FM stereo generator. The broadcast ones are very expensive. You can buy one made for a lab cheap. It sort of works. A real broadcast one is simple but much more expensive. _______________________________________________ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user