We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

Subject / Started by Last post
2 Replies
999 Views
Last post December 01, 2021, 0147 UTC
by ~SIGINT~
2 Replies
967 Views
Last post November 29, 2021, 2230 UTC
by Daniel Wyllyans
2 Replies
1348 Views
Last post July 04, 2018, 2353 UTC
by ChrisSmolinski
2 Replies
1101 Views
Last post September 04, 2023, 2357 UTC
by TRI International
2 Replies
1024 Views
Last post October 09, 2020, 2218 UTC
by Skipmuck
2 Replies
856 Views
Last post May 28, 2023, 0354 UTC
by danimonsky
2 Replies
981 Views
Last post July 10, 2023, 1734 UTC
by ChrisSmolinski
2 Replies
975 Views
Last post April 13, 2023, 2338 UTC
by N2MLP
2 Replies
787 Views
Last post April 26, 2023, 2348 UTC
by Shortwave_Listener
2 Replies
950 Views
Last post February 17, 2023, 0504 UTC
by Treehouse SWL
2 Replies
982 Views
Last post March 25, 2023, 2138 UTC
by Daniel Wyllyans
2 Replies
917 Views
Last post March 26, 2023, 2153 UTC
by Dxcan
2 Replies
1116 Views
Last post May 28, 2018, 1449 UTC
by ChrisSmolinski
2 Replies
1060 Views
Last post May 12, 2018, 2111 UTC
by ChrisSmolinski
2 Replies
864 Views
Last post February 18, 2023, 0514 UTC
by myteaquinn
2 Replies
1303 Views
Last post May 07, 2018, 0103 UTC
by Helicaster
2 Replies
1660 Views
Last post December 29, 2019, 1555 UTC
by ChrisSmolinski
2 Replies
1288 Views
Last post May 06, 2018, 1516 UTC
by Skipmuck
2 Replies
1089 Views
Last post December 15, 2019, 1550 UTC
by Daniel Wyllyans
2 Replies
1080 Views
Last post November 15, 2019, 1152 UTC
by ChrisSmolinski

 

Normal Topic
Hot Topic (More than 15 replies)
Very Hot Topic (More than 25 replies)

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground House Flag
by MitchellTimeDesigns