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
749 Views
Last post June 04, 2025, 0428 UTC
by Molvania Poacher
2 Replies
1130 Views
Last post June 02, 2025, 0949 UTC
by hsmith77
1 Replies
565 Views
Last post June 01, 2025, 2108 UTC
by hsmith77
1 Replies
537 Views
Last post June 01, 2025, 1133 UTC
by RainBrandy
2 Replies
573 Views
Last post June 01, 2025, 0328 UTC
by aurora
2 Replies
677 Views
Last post June 01, 2025, 0210 UTC
by shadypyro
1 Replies
441 Views
Last post May 31, 2025, 1041 UTC
by AlexRadioDX
2 Replies
513 Views
Last post May 31, 2025, 1014 UTC
by hsmith77
0 Replies
285 Views
Last post May 31, 2025, 0227 UTC
by Radiouser
0 Replies
449 Views
Last post May 30, 2025, 1244 UTC
by ChrisSmolinski
3 Replies
736 Views
Last post May 27, 2025, 0125 UTC
by Molvania Poacher
5 Replies
663 Views
Last post May 27, 2025, 0124 UTC
by Molvania Poacher
2 Replies
515 Views
Last post May 27, 2025, 0123 UTC
by Molvania Poacher
4 Replies
699 Views
Last post May 27, 2025, 0122 UTC
by Molvania Poacher
0 Replies
290 Views
Last post May 27, 2025, 0002 UTC
by Radiouser
6 Replies
903 Views
Last post May 26, 2025, 1527 UTC
by TRI International
0 Replies
732 Views
Last post May 25, 2025, 1536 UTC
by Benoit LEVEQUE
0 Replies
301 Views
Last post May 25, 2025, 1350 UTC
by Radiouser
1 Replies
613 Views
Last post May 24, 2025, 1550 UTC
by herman
0 Replies
690 Views
Last post May 24, 2025, 1304 UTC
by Benoit LEVEQUE

 

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

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground Garden Flag
by MitchellTimeDesigns