Jim, yes while working FST4-60 you will not auto detect FST4-300 signals
which I was using unless you manually see the signal line, and see its
vertical size past the '60' markers, to then increase the time capture
to match it, as I am sure you are well aware, but that is why you have
not seen me recently.
I think you are going to need a few hundred watts minimum to work me
back on FST4-60, I see your good reports on my 60 signal, so there
should be no issue in making the FST4-60 contact. I usually use my 600
Hz RFilter to double the signal rx at the 2000 mark. I used the same
trick on 6m FT8 to work the USA recently.
On the FTDX101MP, which mine was fully optioned with optional filters at
dispatch, the rx signal gain is fantastic, and can make all of the
difference. I also use the 1200 or 300 Hz RFilter sometimes, but it is
good to have a reasonable spread as well. Once a sought signal is known
from a cluster or a random rx, then lost etc on its audio freq, you can
hone in on it with narrow filtering.
Adrian Fewster
On 10/2/21 5:56 am, Jim Brown wrote:
Hi Adrian,
Perhaps Bill and I can try FST4-300 to determine if it's a frequency
stability issue on his end. I've been staying up to watch for you
around your sunset with the possibility of working you QRP, but
haven't seen you for several nights. I'm monitoring FST4-60. I'm also
running a K3.
73, Jim K9YC
On 2/9/2021 6:46 AM, Adrian wrote:
Bill tried again tonight with N6SS on FST4-300, and no success here
decoding.
I used both 600Hz roofing filter making a very prominent seen signal
N6SS, and tried with the normal 3 KHz rx filter.
Tried 20 and 100 FTol. After several rx seen signal passes, there was
no decode. TX and RX pan freq were both set at 2000Hz
It seems ok on FST-60, I may have to give up on 300, no more ideas on
this.
Thankyou
Adrian Fewster
-----Original Message-----
From: Bill Somerville [mailto:g4...@classdesign.com]
Sent: Tuesday, 9 February 2021 1:44 AM
To: wsjt-devel@lists.sourceforge.net
Subject: Re: [wsjt-devel] WSJT-X v2.3.0 Oc42df.
On 08/02/2021 15:29, Adrian wrote:
Working with N6SS trying FST4-300 tonight on 160m we noticed a few
things ;
His wsjtx gui has a freq high and low parameter, whereas mine does
not, but has a F Tol parameter, which he has not.
However both his and mine show version WSJT-X v2.3.0 Oc42df. For final
v2.3.0 release in the help info section ?
Preston was able to decode me, but I never decoded his signal even
though prominent on the waterfall.
Preston was also using ~500 Hz audio frequency whereas I used 2000 Hz.
He as at 1.839 whereas I was at 1.8375
Would the low audio frequency effect signal fidelity for decoding ?
I am trying to see why I could not decode ?
Adrian Fewster
Hi Adrian,
the differences you see are due to you having
"Settings->General->Single decode" checked and N6SS not. In single
decode mode the decoder only attempts to decode signals within the
selected Rx offset and frequency tolerance around that, only the
first successful decode is printed. With single decode not checked
multiple signals may be decoded within the specified low and high
frequency limits after an initial decode attempt at the selected Rx
offset ±20 Hz.
You have not provided enough information to determine the one way
decoding, but the above should allow you to assess if it was merely a
settings issue.
73
Bill
G4WJS.
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