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
3 Replies
752 Views
Last post May 08, 2019, 2335 UTC
by Ct Yankee
0 Replies
485 Views
Last post April 22, 2020, 1455 UTC
by Ray Lalleu
0 Replies
419 Views
Last post March 03, 2021, 1742 UTC
by Ray Lalleu
1 Replies
490 Views
Last post December 31, 2021, 1959 UTC
by TRI International
1 Replies
128 Views
Last post October 03, 2025, 1730 UTC
by Alaska_CZ
0 Replies
474 Views
Last post October 23, 2018, 1559 UTC
by Ray Lalleu
0 Replies
479 Views
Last post January 18, 2020, 1921 UTC
by Ray Lalleu
1 Replies
294 Views
Last post September 20, 2023, 2302 UTC
by N2MLP
0 Replies
216 Views
Last post June 25, 2025, 1914 UTC
by Ray Lalleu
0 Replies
335 Views
Last post July 23, 2020, 2028 UTC
by Ray Lalleu
0 Replies
228 Views
Last post March 23, 2024, 1108 UTC
by Ray Lalleu
0 Replies
498 Views
Last post March 24, 2019, 1710 UTC
by Ray Lalleu
1 Replies
475 Views
Last post January 23, 2021, 2001 UTC
by kris
0 Replies
215 Views
Last post November 05, 2024, 1132 UTC
by Ray Lalleu
2 Replies
569 Views
Last post November 23, 2019, 2032 UTC
by Ray Lalleu
0 Replies
390 Views
Last post October 27, 2020, 0717 UTC
by Ray Lalleu
2 Replies
483 Views
Last post July 12, 2022, 2214 UTC
by kris
0 Replies
179 Views
Last post May 18, 2025, 1620 UTC
by Ray Lalleu
0 Replies
542 Views
Last post April 30, 2021, 2026 UTC
by Ray Lalleu
0 Replies
417 Views
Last post March 02, 2022, 1808 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