Re: [CQ-Contest] Can you not hear me now?

[Zack Widup <w9sz.zack@gmail.com>]

I was curious about the same things. I have not yet used JT65 but I
got very interested in it after a presentation at the VHF Weak-Signal
Forum at Dayton this year. I have downloaded the software and want to
play with it.

Would I use it in a VHF contest? I don't know yet. So far I have
entered most VHF contests as a Single-Op QRP Portable. I don't take a
computer along.  I log on paper and then enter the log into the
computer when I get home. A computer running JT65 would be something
else to drain my battery, and I am usually trying to conserve battery
power as much as possible.  I've been on a pretty tight budget the
last couple years and don't want to buy another battery. But I do want
to experiment with JT65 at home and see how I like it.

73, Zack W9SZ


On Thu, Jun 15, 2017 at 12:15 PM, John Geiger <af5cc2@gmail.com> wrote:
> You bring up a good point about digital modes Tor.  From watching the DX
> cluster, it seemed that quite a few stations probably spent most of the
> contest on 50.276 running JT65.  Also, how do you keep from QRMing each
> other when several stations are all on 50.276?
>
> 73 John AF5CC
>
> On Thu, Jun 15, 2017 at 2:45 PM, RT Clay <rt_clay@bellsouth.net> wrote:
>
>> Somewhat off-topic, but with meteor scatter (even when using MSK144), you
>> usually CAN hear the other signals. The advantage of MSK144 over ear copy
>> is that it can send information in very short meteor bursts that are not
>> long enough for SSB.
>> An equal problem on VHF seems to be that many people are going to digital
>> modes by default, even when signals might be very strong. This makes qsos
>> take much much longer than necessary (one transmission on JT65 for example
>> takes 1 minute). I made one MSK144 qso during the contest with a station
>> 800 miles away on 2m. He was 56-57 (via tropo) and the qso would have been
>> much easier and faster on SSB. He could have probably worked many more
>> stations by calling cq using SSB.
>>
>> Similarly, 50.276 is now jammed with JT65 during 6m openings. Nearly all
>> of the qsos I have made there have been with signals strong enough for easy
>> CW/SSB copy, but using JT65 forces each qso to take several minutes just to
>> exchange a report and grid.
>>
>> Tor
>> N4OGW
>>
>>     On Thursday, June 15, 2017 7:16 AM, James Cain <
>> jamesdavidcain@gmail.com> wrote:
>>
>>
>>   The latest ARRL Contest Update newsletter summarized some 3830 ARRL June
>> VHF  Contest comments as follows:
>>
>>  "In the soapbox comments from the most recent June ARRL VHF Contest many
>> stations were reporting the use of the MSK144 digital mode for making QSOs
>> where a SSB or CW path did not appear to exist. MSK144 can be sent and
>> received using the WSJT-X program by Joe Taylor, K1JT. MSK144 uses
>> exchange  sequences as fast a five seconds to take advantage of propagation
>> that might
>>  occur due to meteor scatter."
>>
>>  Way back in the ancient days of radio there was a saying:
>>
>>  "You can't work them if you can't hear them."
>>
>> Maybe we need an updated saying:
>>
>>  "You can work them even if you can't hear them."
>>
>>  K1TN
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