Since there has been recent discussions on this reflector about JT65 on 1838, I thought I would pass this on.
IMO, digital should go below 1810, AND it should preferably be a narrow band mode such as the superior JT9 mode. As W8JI recently pointed out, insufficient sideband suppression (and IMD products of improperly adjusted rigs) of JT65 signals --becoming more and more common on 1838-- winds up in the area where weak signal DX is common. Furthermore, Joe Taylor himself --the author of JT65 and JT9-- has stated in no uncertain terms that the JT9 mode is superior to the far wider JT65 mode for MF and lower HF weak signal communications. JT65 is for EME and upper HF. I suggest that this be discussed here for a week or so before anyone submits comments to the ARRL. 73, Mike www.w0btu.com ---------- Forwarded message ---------- From: ARRL Web site <[email protected]> Date: Mon, Mar 3, 2014 at 11:29 AM Subject: ARLB007 ARRL Board Requests Member Comments About Digital Modes ... At the January 2014 ARRL Board of Directors meeting, a resolution was passed which asked for member feedback and input pertaining to the increasing popularity of data modes. The information gathered by this investigation is to be used by the HF Band Planning Committee of the Board as a means to suggest ways to use our spectrum efficiently so that these data modes may "compatibly coexist with each other." As per the resolution, the ARRL Board of Directors is now reaching out to the membership and requesting cogent input and thoughtful feedback on matters specific to digital mode operation on the HF bands. The feedback may include, but is not limited to, the recent proposal the ARRL made to the FCC, RM 11708, regarding the elimination of the symbol rate restrictions currently in effect. A FAQ on RM 11708 can be found on the web at, http://www.arrl.org/rm-11708-faq . The Board of Directors believes that member input in the decision making process is both valuable and important as well as fostering a more transparent organization. It is to this end that we open this dialogue. Comments must be received no later than March 31, 2014 to be included in the Committee's report to the Board at the July 2014 ARRL Board of Directors meeting. Please e-mail your comments to: [email protected] Concerned members may also contact their Division Director by mail, telephone or in person with any relevant information. _________________ Topband Reflector Archives - http://www.contesting.com/_topband
