Re: Topband: N7QT on "Increasing the Rate of the JT Modes"
Hi Larry, People are still debating about when to consider a QSO complete. As you mentioned, if you received a report, and sent a report back, the QSO is in theory complete. However, there is no confirmation that the other station received your report, hence the use of RRR. Others want everything, including the return 73. 73 de Vince, VA3VF On 2017-05-21 8:26 AM, Larry wrote: 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 DXpeditions/contests. 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 _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: N7QT on "Increasing the Rate of the JT Modes"
Thank you for the link, Tim. The first ideas/suggestions mentioned in the article are being used by an increasing number of operators. JT65-HF-HB9HQX and JTDX helped that by adding variations to the original standard messages. There was some discussion when these variations were introduced, some positive others negative. The only way to do it with WSJT-X is by using the 'free msg' box. As for the second part, I have to read and re-read that again. I have seen multiples stations calling the DX in different places, but I don't think it was as part of this technique. I think they were just attempts to bring the DX to their frequency, whether to escape the 'pile up', or because the caller had QRM on the DX frequency. There are times of the day that 40 and 20M are extremely busy. We are talking about a 2kHz agreed segment, 4kHz, if adding the JT9 segment. Other ways to improve performance, is to take advantage of multi-pass decoding, built into WSJT-X and JTDX. JT65-HF does not have multi-pass decoding. Another is to activate split in the software. By doing this, the output power is always at max, regardless of where you are in the segment. Again, JT65-HF does not support this feature. 73 de Vince, VA3VF On 2017-05-21 6:53 AM, Tim Shoppa wrote: http://www.arrl.org/ contest-update-issues?issue=2017-05-17 _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: N7QT on "Increasing the Rate of the JT Modes"
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 DXpeditions/contests. 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/ 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 - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
