Does it sound like popcorn? We are plagued with SADL/EPLRS from the air base here in Tucson, however, it's on UHF. It's sweeping pulses betweeen 420 and 450 and since they have an alert commitment, it's on 24/7. A couple years ago, it only occured once in a while but now it's continuous. I haven't heard of anyone having similar on 2 meters.
Just curious. de WD7F John in Tucson ----- Original Message ----- From: "Joe" <k1ike_m...@snet.net> To: <Repeater-Builder@yahoogroups.com> Sent: Wednesday, January 28, 2009 7:45 AM Subject: Re: [Repeater-Builder] 2 meter noise help! > Have you taken a yagi on the roof and tried to determine the direction > of the noise? I find that using the AM mode (on my handheld scanner or > HT) is easier to pinpoint some forms of noise. You didn't say that you > eliminated the antenna. Using the yagi on the roof should give you an > idea of where (or where not) the noise is coming from. > > I've been off packet radio for years, but one of the experiments I > always wanted to do is try and audio DSP unit to eliminate some forms of > noise. Many people don't realize it, but you have discovered how > destructive noise can be to a packet AFSK signal. I had a bad power > line insulator/tie wire combination outside my house that completely > decimated my Netrom node digipeater. The signal sounded good to the > human ear, but the TNC just couldn't decode anything but a full quieting > signal. > > 73, Joe, K1ike > > Christopher K. Greenhalgh wrote: >> While not a true repeater, I hoping the gurus here can help me. >> >> Station info can be seen here; http://www.n8wct.com/n8wct-4/ >> >> The noise is a subtle low-frequency "bacon crackling". It is apparent >> across the whole 2 meter band. Every piece of (my) equipment has been >> replaced, or substituted. We even bypassed the filter, turned >> everything off, and the noise was still present, even on battery >> power. SWR is fine...the station can be heard 90 miles away. > > > ------------------------------------ > > > > Yahoo! Groups Links > > > -------------------------------------------------------------------------------- No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.233 / Virus Database: 270.10.14/1920 - Release Date: 1/27/2009 6:15 PM
