Topband: N7QT on "Increasing the Rate of the JT Modes"
lknain at nc.rr.com
Sun May 21 08:26:32 EDT 2017
The traditional JT65 QSOs are a bit like watching grass grow. But a
couple of DXpeditions have run some JT65 lately. But I have had a number
of cases where I called CQ and stations responded with a signal report.
After responding with a signal report the QSO was considered complete.
Some still want a "73" to complete the QSO. This scheme mimics the
traditional CW/SSB "599/59, 599/59, TU" style exchange for
There have been a number of VK and JA stations on 80 JT65 I have worked
from the East Coast earlier in the year. Many VK, JA, HL, and YB
stations on 40. I did work VK on 160.
73, Larry W6NWS
On 5/21/2017 6:53 AM, Tim Shoppa wrote:
> In the latest ARRL Contest Update, N7QT has a very interesting article on
> increasing rate with the usually slow JT65 modes, from a max of one QSO
> every 6 minutes to one every 4 minutes. K7ADD notes an additional doubling
> of rate can be achieved if you can keep two QSO's in flight at any point in
> time by interleaving transmit and receive on two different frequencies
> within the same band (a EXTREMELY advanced technique, and one that does not
> eat much more bandwidth given the extremely low bandwidth these modes
> take), giving a rate of 20 or even 30 QSO's per hour.
> So possibly these methods could be used by a DXpedition that has already
> worked through all the "Easy" CW guys at a higher rate earlier.
> N7QT also notes that from the west coast on the pickup in activity from
> Asia on JT65: "He often decodes more signals between 14.076 MHz and 14.078
> MHz than there are signals in the entire CW band segment."
> See details in the ARRL contest update here: http://www.arrl.org/
> Me? I love RTTY contesting so you might think I'd appreciate JT65. But the
> one time a local friend tried to show me JT65 in action I got bored and
> wandered away long before I got to see an actual QSO. But maybe us
> contesters and DX'ers have something to teach these digital guys something
> about rate!
> Tim N3QE
> Topband Reflector Archives - http://www.contesting.com/_topband
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