Dave, There's been a lot of ROS activity close enough to 14100 to cause interference to the NCDXF beacons, not to mention the Packet network on 105, the ALE network on 109 and the Olivia activity near the same frequencies. I understand that some are anxious to work a new mode, but it shouldn't come at a cost to others.
I, personally, don't use 14.101MHz and have been trying to persuade people to move up the band a bit anyway. Glad to hear it - and what better forum is there than the digital reflector to inform others about the QRM? I'm sure most of the ROS operators found the mode on this reflector. > the deafening silence has been the art of persuasion rather than big boots > stomping up and down on > a new experimental mode. I'm not trying to condemn the mode, in fact, I admire those like Jose, Patrick and others. I was just trying to bring attention to the handful of ROS operators who were less than courteous to their fellow hams. There's really no excuse for this kind of blatant free-for-all. > I do hope that you will be figuring out who and what that packet or TOR mode > is that is below 14.101, and nearer the beacon > frequency and stomping on that as well? If I hear it, I will. It's our duty to inform others about interference they may be causing, especially the QRM that might cause harm in the event of an emergency. I guess I'm a bit touchy about the interference issue after 9/11. By the way Dave, I monitored a contact from Haiti after the earthquake and it was riddled with QRM at times. I'm not saying the interference was deliberate, but the station receiving the emergency traffic had to clear the frequency more than once - go figure. Tony -K2MO - Original Message ----- From: Dave Ackrill To: digitalradio@yahoogroups.com Sent: Saturday, February 27, 2010 5:00 AM Subject: Re: [digitalradio] NCDXF / ROS 14101QRM Tony wrote: > Sholto, > > The silence is deafening... > > I'm sure there are some who may be unaware of the the NCDXF beacon network ( > www.ncdxf.org ) but there's no excuse for the deliberate QRM I've witnessed. > I'm very surprised... I, personally, don't use 14.101MHz and have been trying to persuade people to move up the band a bit anyway. So, the deafening silence has been the art of persuasion rather than big boots stomping up and down on a new experimental mode. I do hope that you will be figuring out who and what that packet or TOR mode is that is below 14.101, and nearer the beacon frequency and stomping on that as well? In fact, if ROS is on a dial frequency of 14.101MHz, and like most digital modes it transmits HF of that frequency by some offset, probably about 1.2kHz or so, wont it be far out of the passband of even a wide/normal CW filter? If so, please explain how you are so sure it is ROS that is causing a problem. Even if the '1st tone' was some 400Hz above the dial frequency, that is still 1.4kHz, and only transmitting that 400Hz tone infrequently, so, again, I would have thought way above a 'standard' CW filter width... Dave (G0DJA)
