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
412 Views
Last post August 28, 2025, 0247 UTC
by Radiouser
4 Replies
792 Views
Last post August 27, 2025, 1201 UTC
by ChrisSmolinski
1 Replies
636 Views
Last post August 27, 2025, 0159 UTC
by Treehouse SWL
0 Replies
900 Views
Last post August 26, 2025, 0302 UTC
by Radiouser
0 Replies
657 Views
Last post August 24, 2025, 0443 UTC
by Radiouser
0 Replies
427 Views
Last post August 24, 2025, 0245 UTC
by Radiouser
3 Replies
633 Views
Last post August 23, 2025, 2017 UTC
by Treehouse SWL
4 Replies
699 Views
Last post August 23, 2025, 1647 UTC
by ChrisSmolinski
2 Replies
481 Views
Last post August 23, 2025, 1647 UTC
by ChrisSmolinski
1 Replies
639 Views
Last post August 22, 2025, 1408 UTC
by DXerKen
3 Replies
710 Views
Last post August 22, 2025, 0609 UTC
by Treehouse SWL
2 Replies
807 Views
Last post August 20, 2025, 1802 UTC
by ChrisSmolinski
1 Replies
514 Views
Last post August 18, 2025, 1951 UTC
by TRI International
3 Replies
615 Views
Last post August 18, 2025, 1204 UTC
by DXerKen
2 Replies
441 Views
Last post August 18, 2025, 0100 UTC
by myteaquinn
2 Replies
517 Views
Last post August 17, 2025, 1505 UTC
by myteaquinn
4 Replies
624 Views
Last post August 17, 2025, 1220 UTC
by ChrisSmolinski
0 Replies
329 Views
Last post August 17, 2025, 0244 UTC
by Radiouser
2 Replies
515 Views
Last post August 16, 2025, 2159 UTC
by DXerKen
0 Replies
346 Views
Last post August 16, 2025, 1709 UTC
by myteaquinn

 

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