Hello!
After a while using D-Star and discussing the audio quality of each specific radio in our repeaters, we realize the following: - IC-91, IC92 and IC-2200 have the best audio quality. The audio is richer and have bass which others lack. Its a common sense that the audio of those radios are more pleasant to listen to. - ID-800H, ID-880H and IC-2820H are the worst in audio quality. The audio lacks miserable of low frequencies and is quite common a newbie ask why some TX sounds better than others. So, its something that eventually most will notice. I have the chance to ask Ray Novak from Icom about this matter and he said to me: Its that way because the engineers think the tinny audio cuts better the noise in long distance QSOs. Maybe, but we live under repeaters, we talk a lot over here and the audio of those radios are awful. By the way, this is a recurring complain in forums like eham.net. So we here are not alone and being pick. Maybe in FM is a pro, but in digital, which already lacks of audio quality, is a very bad proposition. There is a modification trying to fix this here: http://www.mods.dk/view.php?ArticleId=4098. I performed this mod, which help a little, something like 20% in my opinion. But still not even close the quality from portables and IC-2200H. Im sure is just a matter of tweaking the filter in the MIC input circuits. So I would like to know if you guys are having the same feeling about those radios and if someone already manage to fix the audio to sound as good as IC-2200H. I have the service manuals of most of these radios, but Im nothing getting any better, since I just know digital circuits and not too much of audio circuits. Any thoughts will be welcome. 73's de PY2JF João Roberto S. G. Ferreira py...@cram.org.br [Non-text portions of this message have been removed]
