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
750 Views
Last post May 01, 2022, 2113 UTC
by Shortwave_Listener
3 Replies
1079 Views
Last post April 11, 2023, 0007 UTC
by N2MLP
0 Replies
639 Views
Last post February 18, 2023, 0004 UTC
by Shortwave_Listener
0 Replies
640 Views
Last post December 18, 2022, 2348 UTC
by Shortwave_Listener
0 Replies
726 Views
Last post October 10, 2022, 1656 UTC
by Shortwave_Listener
2 Replies
1408 Views
Last post December 18, 2023, 1443 UTC
by ChrisSmolinski
0 Replies
666 Views
Last post September 15, 2022, 2337 UTC
by Shortwave_Listener
5 Replies
1198 Views
Last post February 18, 2023, 0044 UTC
by Charlie_Dont_Surf
16 Replies
2573 Views
Last post January 26, 2023, 1528 UTC
by Shortwave_Listener
0 Replies
620 Views
Last post October 09, 2022, 0448 UTC
by Shortwave_Listener
0 Replies
627 Views
Last post September 15, 2022, 0001 UTC
by Shortwave_Listener
0 Replies
627 Views
Last post October 09, 2022, 0018 UTC
by Shortwave_Listener
0 Replies
627 Views
Last post September 14, 2022, 2342 UTC
by Shortwave_Listener
0 Replies
2772 Views
Last post March 22, 2025, 0052 UTC
by Shortwave_Listener
4 Replies
1223 Views
Last post February 17, 2023, 0157 UTC
by FelixChapel
0 Replies
660 Views
Last post November 22, 2024, 0148 UTC
by Shortwave_Listener
0 Replies
705 Views
Last post December 11, 2022, 0034 UTC
by Shortwave_Listener
1 Replies
693 Views
Last post October 09, 2022, 0027 UTC
by Skipmuck
2 Replies
866 Views
Last post September 14, 2022, 1502 UTC
by ChrisSmolinski
2 Replies
877 Views
Last post March 27, 2023, 2259 UTC
by dxace1

 

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