I manage a Linkedin group that is focused on Amateur Radio.
The name of the group is Amateur Radio (HAM Radio). We have nearly 5,000 users world-wide.
There is a lot of very good content on the group posted daily. The group can be found at
https://www.linkedin.com/groups/94303/Come join! Read our posts, add some posts, tell your friends. 73 de Robert KB6QXM