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
477 Views
Last post October 31, 2020, 2042 UTC
by kris
2 Replies
335 Views
Last post July 07, 2023, 2139 UTC
by Ray Lalleu
2 Replies
438 Views
Last post July 15, 2023, 2127 UTC
by kris
2 Replies
445 Views
Last post July 15, 2023, 2130 UTC
by kris
2 Replies
429 Views
Last post July 15, 2023, 2048 UTC
by Robertas
2 Replies
786 Views
Last post June 30, 2019, 1930 UTC
by dandan22
2 Replies
296 Views
Last post July 08, 2023, 2058 UTC
by Ray Lalleu
2 Replies
381 Views
Last post July 03, 2023, 2053 UTC
by europirate
2 Replies
639 Views
Last post June 30, 2019, 2144 UTC
by KaySeeks
2 Replies
277 Views
Last post July 08, 2023, 2241 UTC
by kris
2 Replies
486 Views
Last post July 09, 2023, 2356 UTC
by TRI International
2 Replies
740 Views
Last post July 01, 2019, 1021 UTC
by Ray Lalleu
2 Replies
509 Views
Last post July 16, 2023, 0446 UTC
by Shortwave_Listener
2 Replies
323 Views
Last post July 23, 2023, 0914 UTC
by m3ozp1
2 Replies
358 Views
Last post July 16, 2023, 1940 UTC
by Ray Lalleu
2 Replies
525 Views
Last post November 03, 2020, 1521 UTC
by Ray Lalleu
2 Replies
467 Views
Last post November 03, 2020, 2007 UTC
by FOX
2 Replies
905 Views
Last post July 02, 2019, 1539 UTC
by dxace1
2 Replies
475 Views
Last post July 20, 2023, 0226 UTC
by N2MLP
2 Replies
505 Views
Last post November 03, 2020, 2215 UTC
by Skipmuck

 

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