At 05:18 AM 01/03/07, you wrote: > > > The question that comes to mind is how to you convert the > > > audio deviation from wide to narrow and back again, in a > > > cost effective manner.?
You are NOT converting deviation. Once you get past the receiver demodulator it's all AUDIO until you get to the transmitter modulator. And if properly set up, it's the SAME audio levels. > > It's strictly a question of audio levels in the patch between the two. > > Make sure you have the right level going from each rx to each tx to > > properly drive them, and the transmitters will take care of making it > > the right deviation Simply have a narrow radio that outputs 0dbM into the patch, and accepts 0dbM to make full (narrow) deviation. That takes care of the narrowband channel. Likewise have a normal radio that outputs 0dbM into the patch, and accepts 0dbM to make full (normal) deviation. That takes care of the normal channel. Then tie the audio and PTT / COS lines together, perhaps through a two-port repeater controller like the Arcom RC210 (which is actually 3 ports, but what's an extra port between friends?). Using a repeater controller with the separate audio level pots for each connection makes it EASY. Mike WA6ILQ
