29MHz trans Atlantic DX...

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M0DTS
Posts: 684
Joined: Sun Feb 24, 2008 9:03 pm

Re: 29MHz trans Atlantic DX...

Post by M0DTS » Mon Nov 07, 2022 4:32 pm

Brief test today, 18Ks DVB-S using Pluto.
Custom ffmpeg script to generate this low data rate - not quite working correctly yet.
kiwisdr allows IQ audio of 20KHz span output from the soundcard, this is then fed into sdrangel which does the decoding.
Work to be done but a decode is possible!!!

Rob
Attachments
decode.jpg
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radiogareth
Posts: 1371
Joined: Wed Jan 06, 2016 9:46 am

Re: 29MHz trans Atlantic DX...

Post by radiogareth » Mon Nov 07, 2022 5:19 pm

Wow...is this via your local SDR (nevertheless VERY impressive).
The future is even less BW....and a user guide for SDRAngel ;-)
Great work :-)
Gareth

M0DTS
Posts: 684
Joined: Sun Feb 24, 2008 9:03 pm

Re: 29MHz trans Atlantic DX...

Post by M0DTS » Mon Nov 07, 2022 5:22 pm

Nope, that was via Pennsylvania sdr!!

radiogareth
Posts: 1371
Joined: Wed Jan 06, 2016 9:46 am

Re: 29MHz trans Atlantic DX...

Post by radiogareth » Mon Nov 07, 2022 5:27 pm

WOW, Record Books job that! Well done!!
Gareth.

G4ZCN
Posts: 46
Joined: Thu Jun 26, 2014 5:51 pm

Re: 29MHz trans Atlantic DX...

Post by G4ZCN » Tue Nov 08, 2022 9:16 am

Absolutely amazing Rob, well done you
Barry
G4ZCN
E: b.grylls@ntlworld.com

g8gtz
Posts: 1777
Joined: Wed Apr 07, 2010 6:26 pm

Re: 29MHz trans Atlantic DX...

Post by g8gtz » Tue Nov 08, 2022 9:31 am

Brilliant well done Rob!

73
Noel

M0DTS
Posts: 684
Joined: Sun Feb 24, 2008 9:03 pm

Re: 29MHz trans Atlantic DX...

Post by M0DTS » Tue Nov 08, 2022 2:57 pm

This is just the beginning...
Fingers crossed for some proper live reasonable quality video soon :-)

Rob

radiogareth
Posts: 1371
Joined: Wed Jan 06, 2016 9:46 am

Re: 29MHz trans Atlantic DX...

Post by radiogareth » Tue Nov 08, 2022 3:01 pm

Got my 10m Slim Jim back up and running and 2 watts from Mikes transverter. Can't generate anything less than 66ks even with DATVEasy ATM, keeps saying video bit rate needs increasing if I try less than 66. Thought it autoconfigured? Fast forward on my MRF single device amp next, but watching on 29.00 / just in case.....
The repeater on 29.62 is fully quieting with me at 14:15 and I just worked SV2HJW on FM simplex. The magic band....
Gareth
Last edited by radiogareth on Tue Nov 08, 2022 3:18 pm, edited 1 time in total.

M0DTS
Posts: 684
Joined: Sun Feb 24, 2008 9:03 pm

Re: 29MHz trans Atlantic DX...

Post by M0DTS » Tue Nov 08, 2022 3:05 pm

Going forward i will be using 29.150 centre as it was pointed out that the Satellite section starts at 29.300.
29.250 was a bit close for any wider tests.

Conditions not as good today after yesterday's aurora.

Rob

radiogareth
Posts: 1371
Joined: Wed Jan 06, 2016 9:46 am

Re: 29MHz trans Atlantic DX...

Post by radiogareth » Tue Nov 08, 2022 3:21 pm

Needing a Low pass filter led me to this www, nice and simple and looks pretty good....
https://pa0fri.home.xs4all.nl/Diversen/ ... filter.htm
Gareth

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