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FT4 on sats (1 reply and 1 comment)

ON8NT
1 month ago
ON8NT 1 month ago

Thierry (ON2ACO) and I managed to use FT4 on linear sats (RS-44, CAS4B & A, XW2.,...) with the IC-9700 from Icom.
We used the video from NU1U on Youtube which gives a good step by step 'how-to'.
See: "IC 9700 using SatPC32 and WSJT X"
https://www.youtube.com/watch?v=QhfUSRUP910&t=3s

Thierry and I didn't use SatPC32 but the S.A.T. controller from http://csntechnologies.net/sat

For configuring the RX instance from WSJT-X, also the article from GM4FVM on using multiple instance was very helpfull in setting up the soundcard properly in WSJT-X !
See:
https://gm4fvm.blogspot.com/2021/02/multiple-instances-of-wsjt-x-using-more.html

We are available for making QSO's with other stations!

73!

Jef

OS8NT - ON8NT

Peter M0PWX (2E0PWX)
1 month ago

its an interesting concept, FT4 is a short duration data mode (7.5 sec / cycle) and due to 50hz channel width it could allow more people to have QSO's at same time and so could make more efficient use of the satellite

and with FT4 / 8 able to copy signals at far lower signal / noise ratio than voice potentially copying signals lower on the horizon so longer distances could be achieved as well

i have been trying for a while to get satpc32 to control my FT-991a for a while without success, this might make me have another go]

Peter M0PWX (not pete M0PSX)

 

ON8NT
1 month ago

Hi Pete,

On the morning of the 20/08/21 EA2Z finally made his first qso FT4 via RS44 with ON2ACO…
Working with one transceiver FT857 in split mode vertical antenna on the roof and manual Doppler adjustment.
https://twitter.com/ea2z4/status/1428671700972052482?s=21

The same day I also worked EA2Z. we both used the Diamond V-2000 vertical and now Juan used SATPC32 for doppler...
On my 5element LPDA antenna I had 'desensing' when using RS-44... 145Mhz * 3 = (+/-) 435Mhz, so that's the reason that I used my V-2000 For this QSO on RS-44.

You can also use the IC-705 (or any other transceiver) + SDR stick
See how SM0GTU has managed this at:
https://amsat-uk.org/2021/08/15/guide-to-using-ft4-on-satellites/

On 21/08/21 ON2ACO worked A65BR on RS44. But he has full steerable sat-antennas availeble...

We are available for making QSO's with other stations!

73!
Jef
OS8NT - ON8NT

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