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
1 Replies
1584 Views
Last post October 27, 2022, 1423 UTC
by Shortwave_Listener
1 Replies
2118 Views
Last post September 19, 2022, 2204 UTC
by Shortwave_Listener
1 Replies
1788 Views
Last post September 07, 2022, 2333 UTC
by ted
2 Replies
1591 Views
Last post September 07, 2022, 0212 UTC
by Sky
0 Replies
1640 Views
Last post August 10, 2022, 0948 UTC
by KVKHFF (Andy)
0 Replies
2124 Views
Last post June 21, 2022, 0829 UTC
by Matt_B
1 Replies
2279 Views
Last post June 03, 2022, 0509 UTC
by Shortwave_Listener
0 Replies
2949 Views
Last post January 28, 2022, 0321 UTC
by l0ngwire
0 Replies
2356 Views
Last post January 11, 2022, 0123 UTC
by Treehouse SWL
2 Replies
2409 Views
Last post January 09, 2022, 0204 UTC
by ~SIGINT~
3 Replies
2884 Views
Last post January 08, 2022, 2350 UTC
by circuitmike
2 Replies
2551 Views
Last post November 19, 2021, 1346 UTC
by EA2NR
0 Replies
2003 Views
Last post October 02, 2021, 1629 UTC
by Big Badfish Al
3 Replies
2629 Views
Last post July 29, 2021, 1908 UTC
by ~SIGINT~
1 Replies
2159 Views
Last post June 23, 2021, 0001 UTC
by kandi
1 Replies
2283 Views
Last post May 02, 2021, 0713 UTC
by prldx
0 Replies
1885 Views
Last post April 27, 2021, 1527 UTC
by Nielsbo
11 Replies
5193 Views
Last post April 07, 2021, 0519 UTC
by Matt_B
1 Replies
2504 Views
Last post January 11, 2021, 1836 UTC
by pinto vortando
1 Replies
2154 Views
Last post August 21, 2020, 0736 UTC
by prldx

 

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