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
2 Replies
336 Views
Last post December 13, 2022, 1159 UTC
by kris
0 Replies
235 Views
Last post December 13, 2022, 1155 UTC
by Ray Lalleu
0 Replies
239 Views
Last post December 04, 2022, 0909 UTC
by Ray Lalleu
0 Replies
224 Views
Last post November 26, 2022, 1806 UTC
by Ray Lalleu
0 Replies
282 Views
Last post April 17, 2025, 2020 UTC
by kris
1 Replies
294 Views
Last post June 24, 2023, 2022 UTC
by fox558
2 Replies
513 Views
Last post June 24, 2023, 1959 UTC
by Ray Lalleu
10 Replies
1587 Views
Last post May 24, 2020, 1835 UTC
by Ray Lalleu
4 Replies
465 Views
Last post November 11, 2023, 1001 UTC
by Ray Lalleu
0 Replies
508 Views
Last post April 14, 2023, 0814 UTC
by Ray Lalleu
1 Replies
298 Views
Last post March 09, 2025, 0816 UTC
by radio56
0 Replies
420 Views
Last post March 24, 2023, 1804 UTC
by Ray Lalleu
0 Replies
278 Views
Last post January 31, 2023, 0850 UTC
by Ray Lalleu
0 Replies
260 Views
Last post December 29, 2022, 0939 UTC
by dave1965
4 Replies
674 Views
Last post December 25, 2022, 1940 UTC
by Mad Radio DXer UK
1 Replies
271 Views
Last post December 26, 2022, 0857 UTC
by dave1965
1 Replies
227 Views
Last post March 19, 2023, 0941 UTC
by Robertas
1 Replies
304 Views
Last post February 16, 2023, 1638 UTC
by Ray Lalleu
2 Replies
300 Views
Last post February 16, 2023, 1936 UTC
by TRI International
1 Replies
353 Views
Last post January 24, 2023, 1250 UTC
by dave1965

 

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