The ARRL has steadfastly ignored the problem of automatic stations without busy frequency detectors, which blindly transmit over QSOs already in progress. Allowing automatic stations to employ even w
The ARRL has filed a petition with the FCC to replace the current symbol rate limits with a bandwidth limit. If accepted, digital modes as wide as 2800 hertz would become legal for use by US hams on
I agree that the 300 baud symbol rate limitation should be raised, Steve, but this should be accomplished without making the interference from automatic stations situation worse as the ARRLs petition
From: digitalradio@yahoogroups.com [mailto:digitalradio@yahoogroups.com] On Behalf Of Rick Muething Sent: Sunday, December 08, 2013 9:31 AM To: digitalradio@yahoogroups.com; rtty@contesting.com; DX-
See <http://apps.fcc.gov/ecfs/document/view?id=7520962909> 73, Dave, AA6YQ Can anyone give me some pointers as to what to say to to affectively oppose the ARRL RM-11708 on the FCC ECFS site? Any guid
The FCC doesn't view the comment process as a poll; if they did, they'd just use SurveyMonkey and count the responses. Comments of the form "I love it" or "I hate it" likely have little impact. Comme
If "one of the principal objectives of the ARRL petition is to establish a limit where none presently exists", that objective could have been expeditiously accomplished by simply proposing a bandwidt
Hi Al, Baud rate does NOT limit BW, except for 2-tone FSK RTTY. Actually, two tone FSK RTTY is the ONLY digital modulation that currently has a defacto BW limit under FCC rules. Those limits are 300
I am running the 32-bit version of Windows 7 Professional (SP1) on a Dell XPS 400 with a Pentium D at 2.8 GHz and 2G of RAM. It has no trouble simultaneously running DXLab along with Chrome and sever
I particularly liked this part: "The counterproposals contained in some opposing comments of a 1 kilohertz or a 2.2 kilohertz limit are intended to preclude most data emissions at MF and HF. They are
Thanks, Bob. WinWarbler, the digital mode component of the freeware DXLab Suite, includes both the MMTTY and 2-Tone engines. When working RTTY, you can configure them both to demodulate the same sign
I have used and recommended this circuit for many years; it works well: <http://www.dxlabsuite.com/commander/interface.jpg> 73, Dave, AA6YQ Has anyone used the "transistor type" of serial to TTL (CI-
It's easy to hide a problem by spending $$$ to move it to faster hardware. To date nothing significant has been done to resolve what the LotW Advisory Committee calls LotW's "substantial technical de
Walter has done a fantastic job. Now all that remains is: 1. Once a spot is received from MyDXspot, it should automatically be decoded and the rig set to the precise spotting frequency. 2. The call
Then what was the purpose of the sub band from the get go? the years. Each time, I have posted the FCC's rationale that accompanied 97.221. It effectively says "so that hams can develop techniques t
Auto sub band was created to reduce QRM from the PACTOR ect mode so called robots. The only problem was that others would wonder and then complain when QRM'ed. To bad that all "will" not use that su
But again allow me to point out that for some time now these stations have been in their own sub band. granted exclusive access to any frequency or set of frequencies. Unattended stations are expect
Your exact words were "But again allow me to point out that for some time now these stations have been in their own sub band." The phrase "in their own sub band" could certainly be construed as a sub
The author of that article, WA9PIE, is an owner of Ham Radio Deluxe; he works for J.C. Penney, and can be contacted via Mike (at) wa9pie.net 73, Dave, AA6YQ Not exactly directly related to RTTY but s
Re " The busy frequency detectors deployed by unattended digital stations are not effective." What leads you to this conclusion? 73, Dave, AA6YQ Here are some general thoughts and concerns that can b