Topband: N7QT on "Increasing the Rate of the JT Modes"

Larry lknain at
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:
> contest-update-issues?issue=2017-05-17
> 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 -

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