Please explain how the lack of a high pass filter in a ham grade rig affects tone decoding on a repeater? Most ham grade radios dont have high pass filters on their RECEIVERS,hence the annoying hum heard on their speakers. The most common problem I see is that most ham grade radios have their tone deviation set too high and some have crappy looking waveforms full of harmonics which can drive these panels crazy. Another anomily I found was careful tuning of the repeater receiver will yield a cleaner looking,better balanced response to CTCSS tones,as seen on a o'scope. This yields superior response and less falsing. The same holds true with exciter tuning. 73,Lee,N3APP AND were Spectrum free...only GE ! (couldnt resist either).
----- Original Message ----- From: "mch" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, December 12, 2003 4:24 PM Subject: Re: [Repeater-Builder] Re: site politics. > This wasn't adjacent tones. It was on tones like 100.0, 186.2, 146.2, > and 173.8 - all within second or two of each other - sometimes worse > (even more tones). No, it wasn't being overdriven. Using commercial gear > worked fine, but the ham stuff without high pass filters drove the panel > crazy. For the record, I think it was a Zetron. I prefer CSI, but that's > one reason why the Zetron was 'available' for ham use. :-) BTW, it was > wired per factory specs on a GE M-II station, so it wasn't a mickey > mouse job. > > Maybe I should have tried it on a Spectrum? (couldn't resist) > > Joe M. > > Jim wrote: > > > > mch wrote: > > > > > [EMAIL PROTECTED] wrote: > > > > > >>I would like to see more repeaters pass multiple PL codes > > > > > > > > > I tried doing that using a commercial tone panel, but one problem is all > > > the rigs out there with no high pass filters on the mic kept falsing > > > other codes, and the output tone jumped around too much. > > > > heh-probably using a Zetron panel. They're notorious for adjacent tone > > falsing, although many others do it too... Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
