|
Title: Low End of 80 Meters Shared Spectrum? Post by: AJ1G on April 24, 2012, 07:02:05 AM Sunday night, while trying to NCS the Old Military Radio CW Net on 3570 kc at 2100 EDT, I had really strong interference from a very wide high speed RTTY signal down the band, which seemed to be centered around 3655 kc. It sounded like a military/commercial transmission, went on continuously for the duration of the net, and long afterwards. I though it might be an image response on my BC-348, but I was also able to hear it, although at a lower signal level, on several globaltuners.com internet receivers in the north central and north eastern USA and Canada.
Is that part of 80 meters shared spectrum with other services? Title: Re: Low End of 80 Meters Shared Spectrum? Post by: k4kyv on April 24, 2012, 01:50:37 PM It's supposed to be exclusively amateur in this country, but I believe it is shared spectrum in many others.
Here's another interesting titbit: 3860 kHz Interference (http://www.smeter.net/daily-facts/3/fact9.php) Title: Re: Low End of 80 Meters Shared Spectrum? Post by: Steve - K4HX on April 25, 2012, 09:56:56 AM Might be out of EU. You'll hear lots of that stuff above 3800. I thought below 3800 was exclusively amateur in EU. Maybe not.
I did hear two pirate fishing boat ops on USB around 3508 a few weekends ago. Every other word was f*#$ (or some variation). Title: Re: Low End of 80 Meters Shared Spectrum? Post by: Sam KS2AM on April 25, 2012, 10:41:51 AM Sunday night, while trying to NCS the Old Military Radio CW Net on 3570 kc at 2100 EDT, I had really strong interference from a very wide high speed RTTY signal down the band, which seemed to be centered around 3655 kc. It sounded like a military/commercial transmission, went on continuously for the duration of the net, and long afterwards. I though it might be an image response on my BC-348, but I was also able to hear it, although at a lower signal level, on several globaltuners.com internet receivers in the north central and north eastern USA and Canada. Is that part of 80 meters shared spectrum with other services? How do you know it was high-speed RTTY and not some other mode? Assuming that you weren't able to decode it, what is it about the audio that sounded "military/commercial" ? |