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
407 Views
Last post November 15, 2021, 1605 UTC
by Ray Lalleu
1 Replies
548 Views
Last post November 06, 2023, 1718 UTC
by europirate
0 Replies
219 Views
Last post September 22, 2024, 1012 UTC
by Ray Lalleu
0 Replies
144 Views
Last post August 20, 2025, 1928 UTC
by Ray Lalleu
0 Replies
564 Views
Last post August 18, 2018, 1852 UTC
by Ray Lalleu
0 Replies
393 Views
Last post September 28, 2019, 0814 UTC
by Ray Lalleu
1 Replies
477 Views
Last post June 18, 2021, 0929 UTC
by TRI International
1 Replies
469 Views
Last post May 22, 2022, 1935 UTC
by Ray Lalleu
0 Replies
235 Views
Last post May 27, 2023, 1815 UTC
by Ray Lalleu
1 Replies
248 Views
Last post May 19, 2024, 2204 UTC
by Fisherman
6 Replies
1048 Views
Last post May 17, 2019, 2056 UTC
by Brian
0 Replies
233 Views
Last post February 03, 2023, 0826 UTC
by Ray Lalleu
1 Replies
224 Views
Last post December 24, 2024, 0914 UTC
by eric pyw
1 Replies
502 Views
Last post January 26, 2020, 1658 UTC
by FOX
0 Replies
327 Views
Last post September 29, 2023, 1626 UTC
by Ray Lalleu
0 Replies
158 Views
Last post July 05, 2025, 1453 UTC
by Ray Lalleu
0 Replies
523 Views
Last post June 07, 2018, 1716 UTC
by Ray Lalleu
0 Replies
252 Views
Last post March 29, 2024, 1646 UTC
by Ray Lalleu
0 Replies
205 Views
Last post April 05, 2025, 1924 UTC
by Ray Lalleu
0 Replies
475 Views
Last post April 02, 2019, 1443 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 T-Shirt
by MitchellTimeDesigns