Joe,
I was told (caveat) that he verified the spectrum after the interference started. Since he's investing quite a bit of time into helping clear this up, I have to believe he's done that. 73, Mike WM4B From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of MCH Sent: Wednesday, October 28, 2009 11:51 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Pager Interference to 2-meter & VHF Public Service Band I have to wonder how he can say his stuff is clean when this just started a couple weeks ago. Did he perform a PM check within the last two weeks? Unlikely. Stuff can go south in a minute, and seldom just before you check it. Joe M. Paul Plack wrote: > > > Mike, > > If it moves around based on time of day, my first guess is a PA that's > gone bad, and has a parasitic that's temperature-related. > > If you've tracked an individual spur drifting 70 kHz up the band during > a single transmission, this is not some (intentional) oscillator > drifting, but some combination of failed components or tuning which has > produced a parasitic. > > Sorry to say, but a paging transmitter owner swearing his stuff is clean > is pretty meaningless. The assumption in his industry is the > professionals who maintain his stuff are not the problem, it's "those > damn hams." Sadly, it may more often be the other way around these days, > as companies maintaining paging equipment have transitioned to > underpaid, under-trained card-swappers instead of component-level > technicians with a clue about RF systems. > > 73, > Paul, AE4KR > > > ----- Original Message ----- > *From:* Mike <mailto:mwbese...@cox.net <mailto:mwbesemer%40cox.net> > > *To:* Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> > <mailto:Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> > > *Sent:* Wednesday, October 28, 2009 12:28 PM > *Subject:* [Repeater-Builder] Pager Interference to 2-meter & VHF > Public Service Band > > > > A couple of weeks ago, our repeater system started to experience > interference from a paging system... > > > ...one evening I tracked it from about 145.120 to 145.190 as it > swept through each transmission... > > > > . > > > > > > > ---------------------------------------------------------- > > > Internal Virus Database is out of date. > Checked by AVG - www.avg.com > Version: 8.5.387 / Virus Database: 270.13.38/2274 - Release Date: 07/31/09 05:58:00 >
