DMR working

3B8FO received his DMR Radioddity GD-77 HTs yesterday.

He has been able to work analogue FM with them.

He is now working on their  DiGiTAL  settings/configurations.

It will most probably be integrated in our emcom toolbox.


Some sources  on DMR working/technology are given below.

https://www.youtube.com/watch?v=5ZawJek5z9c

https://www.youtube.com/watch?v=0t-cyOQbGxc

https://www.youtube.com/watch?v=gaDw5pTjWvk

http://hamsci.org/sites/default/files/publications/2018_HamSCI/20180224_170_HamSCI2018_Chen_K2TRW_DMR.pdf

http://www.qsl.net/kb9mwr/projects/dv/dmr/Introduction%20to%20Digital%20Mobile%20Radio.pdf

http://trbo.org/docs/Amateur_Radio_Guide_to_DMR.pdf

Amateur Radio Sri Lanka

Ham radio dans "un pays riverain"  which could  fit our emcom strategy for the indian ocean basin.

https://www.facebook.com/groups/28069502768/

FT8CALL

We have to thank Mike Sinnott for having brought our attention to the new FT8call  data mode.

3B8FO and  3B8CW exchanged few QSOs this morning on 20m.

FT8Call is almost similar to FSQ with few capabilities,such as file transfer, missing.

Anyway it definitely helps for VHF/HF encom though  slow.But during emergencies low speed is better than nothing at all.

So we are including it in our emcom toolbox.

For more information click on the link below.

https://docs.google.com/document/d/159S4wqMUVdMA7qBgaSWmU-iDI4C9wd4CuWnetN68O9U/edit#heading=h.x9tmbbx4tpt0

There is also a users group, see on this link: https://groups.io/g/ft8call

Lesson learnt during california fire.

Do not rely on fixed  infrastructure based telecom services.

Quote from an ARRL  report on the  California fire

 .""...Kruckewitt said Winlink continues to be the go-to mode, as fire has damaged several repeaters and no repeater path exists to the Gold County Region of the Red Cross in Sacramento...."

View full article at

 http://www.arrl.org/news/view/amateur-radio-emergency-service-volunteers-assist-in-california-fire-response

Excellent articles on wspr

http://www.amateurradio.org.za/WSPR%20Tutorial%20v1.0.pdf


http://www.va3rom.com/docs/ATD010.pdf


http://www.va3rom.com/docs/ATD011.pdf

WSPR HF tests

3B8FO had high SWR problems on all frequencies on his HF antenna system.
He discovered that the high swr was due to the presence of some corrugated sheets, which were used to cover his auto ATU, near the feed point  and all is fine now.

3B8FO has started a new HF WSPR test cycle as from now.

Dial freq 7.03860 Mhz power 50w till tomorrow 09/08/18 19.00 hrs LT.

Dial frequency 3.5926  09/08/18 19.00 hrs LT till 10/08/18 19.00 hrs LT.

Dial frequency 14.0956 10/08/18 19.00 hrs LT till 11/08/18 19.hhr LT

2m WSPR tests

Tests results .

Power 5W and  omni antenna on both sides.

3B8CW is the only station which participated in the tests with 3B8FO.

Results can be seen at the below link.

http://wsprnet.org/drupal/wsprnet/spots