David,
The JT modes are designed with spreading in mind - their derivation
was VHF/UHF EME and scatter modes where Doppler is a significant
issue.
My results have been much like Don's ... with nothing more than [low]
dipoles and/or an R5 vertical, I have over 150 DXCC entities, WAS on
80 - 10 (lacking only AK on 160 and 6 meters) and 130+ grids on 6M
(of 400+ total).
My only frustration is with a four to five minute QSO none of the
really rare DX will ever show up on JT65 or JT9 which limits the
absolute number of entities available on that mode.
73,
... Joe, W4TV
On 5/26/2017 10:47 AM, David G3YYD wrote:
How well do the JT modes cope with propagation that spreads the signal
spectrum? This can be over tens of Hz in the worse case.
73 David G3YYD
-----Original Message-----
From: RTTY [mailto:rtty-bounces@xxxxxxxxxxxxxx] On Behalf Of Bill Turner
Sent: 26 May 2017 14:11
To: RTTY Reflector
Subject: Re: [RTTY] Information please
------------ ORIGINAL MESSAGE ------------(may be snipped)
On Fri, 26 May 2017 09:20:25 +0100, you wrote:
You could think about using the other data modes. With low power and
poor propagation, PSK can work a lot better than RTTY.
The ultimate move across to the dark side is JT65. I started using JT65
about 10 days ago and have 60+ countries in the log, operating just a
couple of hours a day.
Very low power is all you need, but it's a horrible slow process with
no skill required. My only motivation is to get to 100 DXCC then back to
RTTY!
John GW4SKA
REPLY:
Even better than JT65 is JT9. A fraction of the bandwidth and according to
the author, about 2 dB better with weak signals. The protocol is the same.
Give it a try, you'll like it.
73, Bill W6WRT
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