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
214 Views
Last post August 15, 2023, 2109 UTC
by TRI International
1 Replies
161 Views
Last post April 25, 2025, 0910 UTC
by Benoit LEVEQUE
1 Replies
277 Views
Last post April 08, 2023, 1839 UTC
by Ray Lalleu
1 Replies
456 Views
Last post April 08, 2023, 1700 UTC
by Shortwave_Listener
3 Replies
352 Views
Last post April 07, 2023, 1955 UTC
by FOX
3 Replies
375 Views
Last post November 03, 2024, 1026 UTC
by RainBrandy
2 Replies
363 Views
Last post April 19, 2025, 1045 UTC
by Benoit LEVEQUE
6 Replies
873 Views
Last post August 14, 2021, 1939 UTC
by kris
4 Replies
347 Views
Last post April 21, 2025, 0706 UTC
by Benoit LEVEQUE
4 Replies
308 Views
Last post April 20, 2025, 0756 UTC
by Benoit LEVEQUE
4 Replies
449 Views
Last post September 06, 2024, 1829 UTC
by Ray Lalleu
0 Replies
455 Views
Last post March 15, 2019, 1620 UTC
by Ray Lalleu
1 Replies
489 Views
Last post April 11, 2019, 1920 UTC
by kris
1 Replies
546 Views
Last post February 24, 2019, 1541 UTC
by Ray Lalleu
1 Replies
704 Views
Last post January 29, 2019, 1556 UTC
by dxace1
0 Replies
675 Views
Last post October 07, 2018, 0215 UTC
by ulx2
2 Replies
626 Views
Last post March 26, 2021, 2102 UTC
by Ray Lalleu
1 Replies
408 Views
Last post December 18, 2021, 2009 UTC
by Ray Lalleu
2 Replies
557 Views
Last post November 01, 2019, 2238 UTC
by kris
1 Replies
961 Views
Last post January 26, 2018, 2139 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 House Flag
by MitchellTimeDesigns