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
254 Views
Last post December 04, 2022, 0859 UTC
by Ray Lalleu
0 Replies
694 Views
Last post April 24, 2018, 2033 UTC
by Ray Lalleu
0 Replies
805 Views
Last post April 25, 2018, 1924 UTC
by Ray Lalleu
5 Replies
1320 Views
Last post June 09, 2018, 2105 UTC
by Brian
6 Replies
1796 Views
Last post May 05, 2018, 2216 UTC
by Brian
2 Replies
550 Views
Last post May 14, 2025, 2128 UTC
by kris
1 Replies
1740 Views
Last post March 29, 2013, 1230 UTC
by ChrisSmolinski
1 Replies
384 Views
Last post September 25, 2022, 0922 UTC
by Ray Lalleu
2 Replies
553 Views
Last post March 24, 2024, 0030 UTC
by kris
0 Replies
293 Views
Last post January 09, 2024, 1725 UTC
by Ray Lalleu
0 Replies
219 Views
Last post March 30, 2025, 0952 UTC
by Ray Lalleu
0 Replies
193 Views
Last post July 20, 2025, 0701 UTC
by Ray Lalleu
0 Replies
138 Views
Last post September 14, 2025, 0701 UTC
by Ray Lalleu
0 Replies
263 Views
Last post April 21, 2024, 0714 UTC
by Ray Lalleu
0 Replies
145 Views
Last post July 13, 2025, 0723 UTC
by Ray Lalleu
0 Replies
207 Views
Last post October 06, 2024, 0738 UTC
by Ray Lalleu
0 Replies
252 Views
Last post November 19, 2023, 0801 UTC
by Ray Lalleu
0 Replies
251 Views
Last post November 26, 2023, 0801 UTC
by Ray Lalleu
0 Replies
227 Views
Last post October 27, 2024, 0827 UTC
by Ray Lalleu
0 Replies
304 Views
Last post September 22, 2024, 1025 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