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 <memberlist@www.arrl.org>
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: HF-Digital-Bandplanning@arrl.org
Concerned members may also contact their Division Director by mail,
telephone or in person with any relevant information.
_________________
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