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
1 Replies
271 Views
Last post December 30, 2022, 1046 UTC
by Ray Lalleu
1 Replies
263 Views
Last post December 24, 2022, 1058 UTC
by Ray Lalleu
0 Replies
220 Views
Last post January 21, 2023, 0910 UTC
by FOX
1 Replies
282 Views
Last post January 24, 2023, 0829 UTC
by Ray Lalleu
0 Replies
270 Views
Last post November 14, 2023, 1833 UTC
by Ray Lalleu
2 Replies
339 Views
Last post December 03, 2023, 1709 UTC
by FOX
1 Replies
266 Views
Last post September 27, 2023, 1704 UTC
by europirate
2 Replies
371 Views
Last post October 05, 2023, 1743 UTC
by kris
0 Replies
227 Views
Last post October 03, 2023, 1556 UTC
by Ray Lalleu
0 Replies
231 Views
Last post November 06, 2022, 1552 UTC
by Ray Lalleu
2 Replies
227 Views
Last post October 01, 2023, 1540 UTC
by kris
1 Replies
990 Views
Last post November 07, 2023, 1549 UTC
by kris
2 Replies
429 Views
Last post December 13, 2022, 2113 UTC
by kris
2 Replies
316 Views
Last post September 29, 2024, 1722 UTC
by kris
0 Replies
311 Views
Last post January 06, 2023, 0650 UTC
by Oliver
1 Replies
347 Views
Last post January 31, 2023, 1903 UTC
by Shortwave_Listener
0 Replies
266 Views
Last post February 06, 2023, 1753 UTC
by Ray Lalleu
1 Replies
296 Views
Last post February 25, 2023, 1954 UTC
by Ray Lalleu
1 Replies
252 Views
Last post February 16, 2023, 1829 UTC
by kris
0 Replies
413 Views
Last post March 29, 2025, 1654 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