For those who thought HF and MF can be scrapped and replaced entirely by satellite, you can read here what happened when one of the major providers of satellite service was hacked the day Russia attacked Ukraine in February 2022:

https://nrrl.no/nyheter/nrrls-assistanse-til-meteorologisk-institutts-stasjoner-pa-ishavet/

Google Translate will do a decent job here if you don't read Norwegian.

A couple of background links about the break of communications:

https://thestack.technology/viasat-ka-sat-outage-cyber/
https://news.viasat.com/blog/corporate/ka-sat-network-cyber-attack-overview

Thanks Marjamada.
Unfortunately the forum has fallen into disuse.
Hopefully that will change. Thank you for your post.
Gil.

Quote from: RadioRay on June 15, 2022, 01:43:21 PMThe training schedule can be found here: http://radio-relay.org/wp-content/uploads/2022/06/RRI-Training-Classes-3Q-2022.pdf

Information from RadioRay in another thread today:

"The website has been changed to radiorelay.org — No hyphen between words."

Thanks for the note, Sparks.  The website has been changed to

radiorelay.org

No hyphen between words.


73 & ZUT de RadioRay  ..._ ._

Quote from: RadioRay on September 03, 2018, 10:36:08 PMRadio Relay International  after action report on exercise contains useful information about QRP CW for emergency communication.

http://radio-relay.org/wp-content/uploads/2018/05/RRI-2018-Q1-and-Q2-Exercise-Evaluation.pdf

Please note: "radio-relay.org is parked free, courtesy of GoDaddy.com".

Bump!

Bump!

Thanks to make me discover that sparkplug-antenna !! HI
excellent !!

Hi Mark,
thanks for sharing that info. I'm in the "balun/transformer subject" for now and not heard of that method.
Interesting measure's results !

73, Ben

Hi Gil and all members. Greetings from Arizona. Thank you, Gil, for doing what needed to be done, creating community. We have our societies in various countries, but real community is hard to find. It is especially critical now, as there are signs that we are all soon to live in a world torn apart by war. In any kind of such crisis, Ham radio has been vital for the preservation of community, and even for the functioning of society. I was involved years ago in disaster relief, mostly in Central America (Nicaragua and Guatemala) where earthquakes devastated large areas and the basic infrastructure of the society was impaired or destroyed. I was part of a relief team from the USA and we could only communicate with our HQ in the US by using local Ham operators. It was that experience that inspired me to become a Ham. So your group here is especially meaningful to me, as I believe we may be forced to rely on radio for basic communications. Thank you also for the videos on the 49:1 EFHW antennas. I just received a toroid and will build one. Perhaps we meet on the air using them.