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
0 Replies
937 Views
Last post February 07, 2023, 1054 UTC
by TRI International
2 Replies
961 Views
Last post March 19, 2024, 1717 UTC
by manfredo
0 Replies
892 Views
Last post October 13, 2023, 0033 UTC
by ~SIGINT~
1 Replies
907 Views
Last post February 06, 2022, 1219 UTC
by UtilitySeattle
1 Replies
4265 Views
Last post June 02, 2015, 0053 UTC
by Cornel
1 Replies
1290 Views
Last post January 17, 2024, 1957 UTC
by ~SIGINT~
0 Replies
1425 Views
Last post January 26, 2019, 0113 UTC
by Boriken
1 Replies
1085 Views
Last post November 07, 2024, 0007 UTC
by kris
1 Replies
1611 Views
Last post March 22, 2022, 2346 UTC
by Josh
0 Replies
2467 Views
Last post December 01, 2019, 0200 UTC
by Josh
2 Replies
944 Views
Last post November 16, 2024, 1604 UTC
by n2avh
1 Replies
719 Views
Last post November 24, 2024, 1459 UTC
by Ray Lalleu
9 Replies
1709 Views
Last post May 06, 2024, 1930 UTC
by kris
1 Replies
877 Views
Last post August 05, 2024, 2017 UTC
by Ray Lalleu
3 Replies
911 Views
Last post October 27, 2024, 0126 UTC
by Professor
4 Replies
1208 Views
Last post June 21, 2024, 0820 UTC
by Fisherman
8 Replies
3641 Views
Last post October 13, 2023, 1418 UTC
by ~SIGINT~
0 Replies
2970 Views
Last post March 31, 2012, 1132 UTC
by ChrisSmolinski
0 Replies
704 Views
Last post July 16, 2024, 0144 UTC
by n2avh
1 Replies
1070 Views
Last post October 13, 2023, 1417 UTC
by ~SIGINT~

 

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