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
354 Views
Last post March 22, 2024, 2042 UTC
by WA0093SWL
2 Replies
449 Views
Last post February 26, 2023, 2100 UTC
by europirate
1 Replies
266 Views
Last post January 29, 2023, 1034 UTC
by Ray Lalleu
1 Replies
407 Views
Last post September 19, 2020, 1932 UTC
by kris
1 Replies
526 Views
Last post June 27, 2018, 2156 UTC
by kris
4 Replies
685 Views
Last post August 01, 2021, 2040 UTC
by Grey Fox
3 Replies
976 Views
Last post November 19, 2018, 1543 UTC
by Ray Lalleu
0 Replies
276 Views
Last post October 09, 2020, 1827 UTC
by Ray Lalleu
0 Replies
344 Views
Last post August 03, 2020, 2021 UTC
by Ray Lalleu
1 Replies
321 Views
Last post March 26, 2023, 1757 UTC
by kris
0 Replies
688 Views
Last post October 19, 2019, 2119 UTC
by SorensenDK
1 Replies
418 Views
Last post December 02, 2023, 1836 UTC
by kris
0 Replies
467 Views
Last post May 02, 2021, 1656 UTC
by RainBrandy
0 Replies
91 Views
Last post August 04, 2025, 0819 UTC
by dave1965
3 Replies
378 Views
Last post February 24, 2024, 2134 UTC
by Fisherman
0 Replies
260 Views
Last post December 31, 2023, 1603 UTC
by Ray Lalleu
3 Replies
472 Views
Last post April 07, 2025, 0734 UTC
by Benoit LEVEQUE
2 Replies
393 Views
Last post October 16, 2022, 2241 UTC
by Pigmeat
1 Replies
365 Views
Last post October 30, 2022, 1043 UTC
by Ray Lalleu
1 Replies
274 Views
Last post April 09, 2023, 1040 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 House Flag
by MitchellTimeDesigns