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Re: [VHFcontesting] Digital modes and Aurora

To: "vhfcontesting@contesting.com" <vhfcontesting@contesting.com>
Subject: Re: [VHFcontesting] Digital modes and Aurora
From: jon jones <n0jk@hotmail.com>
Date: Thu, 21 Jan 2021 16:30:37 +0000
List-post: <mailto:vhfcontesting@contesting.com>
That is a great question, Zack and a good answer by Jay. We have not had much 
aurora here in Kansas the last couple of years, so I have not tried FT8 yet on 
Aurora. I see FT8 seems to work for evening TEP on 6 Meters from the Caribbean 
to South America. Evening TEP has some doppler shift and signal spread. But I 
agree the doppler shift and spreading on 50 MHz Aurora, and definitely the 
higher bands would likely not work for FT8. CW is still the best mode for 
Aurora on 2 Meters and up.

 -- Jon N0JK


Zack, I haven't yet found a WSJT mode that could handle AU well (actually,
at all..).  Possibly the NEW (...another one ??) Q65 mode could work on 6M
since it's supposed to be relatively immune to doppler, but I suspect the
signal distortion would mess that mode up, also.

I doubt there is anything out there better than CW for AU on 2M and above,
although we all know that SSB will do the job most of time on 6 if the
operator is aware of what's going on and changes procedure a bit.


Keith J Morehouse
Managing Partner
Calmesa Partners G.P.
Olathe, CO

On Thu, Jan 21, 2021 at 6:48 AM Zack Widup <w9sz.zack@gmail.com> wrote:

> Here is a question I have had, lacking experience in this, How does AU
> affect digital QSO's? I have worked LOTS of AU with CW. It has spread CW
> signals out over as much as a kHz and made SSB unintelligible. It just
> seems to me that, under those conditions, a digital mode wouldn't work over
> AU.
> 73, Zack W9SZ

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