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
754 Views
Last post April 01, 2022, 1907 UTC
by Bali_Frank
1 Replies
484 Views
Last post April 20, 2021, 1935 UTC
by kris
1 Replies
679 Views
Last post July 11, 2019, 2052 UTC
by TonyD
1 Replies
681 Views
Last post May 13, 2018, 0629 UTC
by The Ether Hacker
2 Replies
606 Views
Last post June 16, 2025, 2006 UTC
by RainBrandy
3 Replies
642 Views
Last post July 14, 2024, 1910 UTC
by Grey Fox
0 Replies
414 Views
Last post July 02, 2022, 0913 UTC
by Ray Lalleu
0 Replies
149 Views
Last post September 26, 2025, 2303 UTC
by Ray Lalleu
0 Replies
526 Views
Last post April 14, 2020, 1849 UTC
by Ray Lalleu
1 Replies
444 Views
Last post March 21, 2025, 1320 UTC
by Benoit LEVEQUE
0 Replies
341 Views
Last post May 06, 2023, 1918 UTC
by Ray Lalleu
2 Replies
725 Views
Last post September 07, 2019, 2049 UTC
by Ray Lalleu
2 Replies
447 Views
Last post August 26, 2022, 1723 UTC
by Shortwave_Listener
0 Replies
498 Views
Last post September 19, 2021, 1916 UTC
by Ray Lalleu
0 Replies
339 Views
Last post November 23, 2020, 1628 UTC
by Ray Lalleu
0 Replies
453 Views
Last post January 03, 2020, 1133 UTC
by Ray Lalleu
0 Replies
664 Views
Last post December 07, 2018, 1931 UTC
by Ray Lalleu
0 Replies
117 Views
Last post October 25, 2025, 1947 UTC
by Ray Lalleu
0 Replies
213 Views
Last post December 07, 2024, 1624 UTC
by Ray Lalleu
0 Replies
437 Views
Last post January 27, 2024, 1928 UTC
by Ray Lalleu

 

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