434.00 is a commonly used ATV channel. Look for a wideband FM sound carrier + and - 4.5 Mhz
On 11/10/07, Com/Rad Inc <[EMAIL PROTECTED]> wrote: > > ATTN: Ken Arck > > We should compare notes on this stuff - > The radio spectrum as we knew it is rapidly getting polluted. > With all the attention to the neo-systems ( NexTel etc ) > little attention is being paid to the "former" > > Ed > Com/Rad Inc > > ----- Original Message ----- > *From:* Ken Arck <[EMAIL PROTECTED]> > *To:* Repeater-Builder@yahoogroups.com > *Sent:* Saturday, November 10, 2007 11:21 AM > *Subject:* Re: [Repeater-Builder] Possible interference on 146.160 > > I DESPISE the proliferation of all these unlicensed wireless devices > cropping up these days (I saw the downward spiral in wireless > "professionalism" starting when the FCC started eliminating 1st, 2nd > and 3rd Class RadioTelephone licenses and replacing them with the - > IMHO - useless General RadioTelephone ticket). But I digress... > > After many years of operation with no problems, about 2 weeks ago we > started experiencing an intermittent "hash" type interference on my > 434.xxx link receiver at one of my sites. It didn't appear on any > other receiver up there - not the 146.320 nor the 446.900 one. When > it occurs, it sounds a lot like horizontal sync buzz and usually > lasts a few hours or so. Of course the link is toned so the buzz is a > problem only as it relates to "capturing" a valid link signal being > received. > > I went up to the site and luckily it was happening while I was there. > According to my handheld, it was fairly weak and was wide - from > about 200 kHz below my receive link channel to above it by almost 500 > kHz. This seems a bit narrow to be a video signal but I noticed > towards the high end of the range, the buzz fades only to be replaced > by a "quiet" carrier. Strange.... > > I plan on taking my SA up there next week to see if I can better > identify the offending signal but I suspect it's one of those low > power, Part 15 434 mHz POS.... > > Ken > ---------------------------------------------------------- > President and CTO - Arcom Communications > Makers of repeater controllers and accessories. > http://www.arcomcontrollers.com/ > Authorized Dealers for Kenwood and Telewave and > we offer complete repeater packages! > AH6LE/R - IRLP Node 3000 > http://www.irlp.net > "We don't just make 'em. We use 'em!" > > >
