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
520 Views
Last post June 14, 2022, 1841 UTC
by achim
0 Replies
284 Views
Last post June 29, 2023, 1935 UTC
by Ray Lalleu
0 Replies
284 Views
Last post June 23, 2024, 0814 UTC
by Ray Lalleu
1 Replies
819 Views
Last post June 18, 2019, 1940 UTC
by kris
0 Replies
428 Views
Last post May 16, 2020, 1456 UTC
by Ray Lalleu
1 Replies
523 Views
Last post April 03, 2021, 1739 UTC
by kris
0 Replies
294 Views
Last post March 04, 2023, 1031 UTC
by Ray Lalleu
1 Replies
260 Views
Last post January 19, 2025, 1055 UTC
by europirate
0 Replies
455 Views
Last post February 28, 2020, 1705 UTC
by Ray Lalleu
0 Replies
741 Views
Last post July 18, 2018, 1712 UTC
by Ray Lalleu
1 Replies
532 Views
Last post May 06, 2022, 1830 UTC
by ukdxer
0 Replies
575 Views
Last post July 18, 2018, 1716 UTC
by Ray Lalleu
0 Replies
500 Views
Last post April 28, 2019, 0921 UTC
by Ray Lalleu
1 Replies
620 Views
Last post February 19, 2021, 2244 UTC
by kris
0 Replies
590 Views
Last post January 31, 2022, 1751 UTC
by Ray Lalleu
0 Replies
164 Views
Last post October 24, 2025, 1714 UTC
by Ray Lalleu
1 Replies
664 Views
Last post December 02, 2018, 1516 UTC
by Ray Lalleu
1 Replies
548 Views
Last post December 31, 2019, 1636 UTC
by KaySeeks
0 Replies
305 Views
Last post November 22, 2020, 0925 UTC
by Ray Lalleu
3 Replies
715 Views
Last post September 18, 2021, 1813 UTC
by Grey Fox

 

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