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Author Topic: Not decoding 4S7KKG today  (Read 231 times)

K8KWT

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Not decoding 4S7KKG today
« on: March 10, 2023, 09:44:54 AM »

I thought I was going to get a good chance to work 4S7KKG this morning.  He was running MultiStream.  Usually 3 to 5 streams.

I tried for about 15 minutes without luck.  Then the signals from 4S7KKG got a bit stronger.  I copied all 5 streams at about -7 each.

Then for no apparent reason WSJT-X would not decode the 4S7.  It continued to decode everyone calling him just fine.  It Just wouldn't decode the 4S7.

I could see the signals on the waterfall and I could hear them easily but I would only get a decode from one or two streams once every 10 or 15 cycles.  Even when he occasionally went to one stream.  (He was always good and loud)

Same thing happened with 9N7AA yesterday.  Anyone have any idea what's happening? 

Polor path issue?  I'm in Michigan running a ground mounted vertical.  It's been working well.  I've worked many other stations around the world today and yesterday.  Just wondering if anyone has an idea of what's happening.

Oh I was on 10 meters with 4S7 and 12 Meters with the 9N.

Thank
Bob K8KWT
« Last Edit: March 10, 2023, 09:53:13 AM by K8KWT »
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KD6VXI

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Re: Not decoding 4S7KKG today
« Reply #1 on: March 10, 2023, 10:27:58 AM »

Time Sync Issue?


--Shane
WP2ASS / ex KD6VXI
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K8KWT

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Re: Not decoding 4S7KKG today
« Reply #2 on: March 10, 2023, 10:30:04 AM »

Time Sync Issue?


--Shane
WP2ASS / ex KD6VXI
Time Sync Issue?


--Shane
WP2ASS / ex KD6VXI

Nope time was -.01 the whole time.  Everyone else decoded.

When I was down to decoding only one or two strems every 10+ cycles.  DT was still -.01.
« Last Edit: March 10, 2023, 10:33:05 AM by K8KWT »
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AC9O

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Re: Not decoding 4S7KKG today
« Reply #3 on: March 10, 2023, 10:34:36 AM »

I had the same issue. I think it's polar flutter or some kind of distortion. Same with other signals that way. I could see the 5 streams, but only a rare decode when they were stronger.
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K8KWT

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Re: Not decoding 4S7KKG today
« Reply #4 on: March 10, 2023, 10:42:20 AM »

Okay - I guess that makes me feel a bit better.  I think...

I guess this was a situation that I would have been better off if we were on CW, but I go were the DX is.

Thanks for that reply

Bob K8KWT
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WB8VLC

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Re: Not decoding 4S7KKG today
« Reply #5 on: March 10, 2023, 11:54:38 AM »

I had the same issue. I think it's polar flutter or some kind of distortion. Same with other signals that way. I could see the 5 streams, but only a rare decode when they were stronger.

I had the same issue with FT8WW weeks ago on FT8 but I easily caught him on cw on the same day within hours.

Also the same happened with 9N7AA and JT1CO both on 10 meters ft8 which was a major failure but then after they both moved to CW I easily caught them on 10 meters.

I checked both 9N7AA and JT1CO for the next two weeks on ft8 and all times FT8 failed to complete a contact but when the same stations went to cw they were easily worked. 

 I had a similar experience with an Armenian and other central asia hams on 20 meters this past week where FT8 beaming over the pole for me failed miserably but cw worked fine.

I'll stick to CW over FT8 after my most recent experiences and yes I know that some of these rare dx hams don't get down to cw much but maybe they need to reconsider this mode and give up on FT8.

FT8 isn't the great weak signal mode that some think it is and so far for me and my hearing and my ears have succeeded at cw when FT8 has been a major failure.
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KE8KMX

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Re: Not decoding 4S7KKG today
« Reply #6 on: March 10, 2023, 01:29:51 PM »

Got 4S7KKG on 10 and 12m FT8 this AM.  Got times were eezy peezy.  16:08UTC on 10 and 17:32utc on 12m.  He was a -02 and a -06.    Got a 73 on both and I used F/H.


Gino



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ALPHA89

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Re: Not decoding 4S7KKG today
« Reply #7 on: March 10, 2023, 04:57:57 PM »

I was fortunate to work both stations from central Texas without any decode issues using a Hex Beam antenna at 48'.  My WSJT-X decode was set to deep and time synch spot on.  Also, I do not use any DSP, NR, NB settings or narrow filters on the transceiver. 
In my opinion, the major problems I frequently encounter are inconsiderate and unskilled ops (LIDS) calling on the F/H DX multi stream frequencies and wrong time period, etc. 
73' de Dave -W5BU
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