Suggested usage for new WSJT-X Q65 modes in WSJT-X 2.4.0 rc1 just released

[Mike Lewis]

Excerpt from email reply on the dev email list about the new Q65 mode usage in the just released WSJT-X 2.4-rc1. Also attached announcement for 2.4.0 rc1.

_____________________________________
...
Please refer to the Quick-Start Guide to Q65:

"Recommended submodes: ...

* Ionospheric scatter on 50 MHz: 30A

* QRP ionospheric scatter on 50 MHz: 120E * Ionospheric scatter on 144 MHz: 60C * Troposcatter and rainscatter at 10 GHz: 60D * Small-dish EME, 10 and 24 GHz: 120E * Other EME: 50, 144 MHz 60A; 432 MHz 60B; 1296 MHz: 60C; 10 GHz: 60D"

-- Joe, K1JT
....
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And this morsel from Bill about suggested frequencies (so far)
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Hi Bill,

for N. America at least 50.275 for terrestrial ionoscatter, and 50.211 for EME have been proposed. In EU testing activity has been lower, 50.305 has been suggested as a possible frequency for terrestrial operation in the EU over long distances. Nothing is set in stone at this stage.

73
Bill
G4WJS.
...
__________________________________________

Mike
K7MDL EL87sm & CN88sf

[Edward R Cole]

I have run JT65B and MAP65 for several years on 144-eme and found
lower limit for decoding 100% is about -26 dB and some decoding down
to -28 dB so Q65 promising to extend that down to low as -31 dB is
encouraging.

For those not familiar with JT65 signal level indications, its the
level below SNR=0 at 2.5 KHz bandwidth. CW is detectable to -17 dB
on that scale because CW-eme band widths are usually very narrow
(down to 50-Hz).

This obtained by ratio of bandwidth in dB: 10Log(50/2500) = -17 dB.

I am still not QRV on eme due to multiple problems: high SWR on 144,
1kW PA trips off at 100w on 6m; dish removed for rebuild for 1296 & 3400 eme.

But looking forward to trying Q65 once I have an eme system QRV.

73, Ed - KL7UW

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73, Ed - KL7UW
http://www.kl7uw.com
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