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
482 Views
Last post February 14, 2021, 1019 UTC
by Ray Lalleu
0 Replies
487 Views
Last post April 23, 2019, 0102 UTC
by Ray Lalleu
1 Replies
334 Views
Last post April 19, 2024, 2105 UTC
by RainBrandy
1 Replies
487 Views
Last post August 21, 2020, 1952 UTC
by FOX
0 Replies
517 Views
Last post July 11, 2018, 1837 UTC
by Ray Lalleu
0 Replies
195 Views
Last post July 28, 2025, 2043 UTC
by Ray Lalleu
0 Replies
333 Views
Last post October 16, 2023, 2045 UTC
by Ray Lalleu
1 Replies
440 Views
Last post August 13, 2022, 1840 UTC
by Shortwave_Listener
3 Replies
707 Views
Last post October 25, 2021, 1459 UTC
by The Ether Hacker
0 Replies
468 Views
Last post November 17, 2020, 1655 UTC
by Ray Lalleu
0 Replies
515 Views
Last post February 21, 2020, 1808 UTC
by Ray Lalleu
0 Replies
233 Views
Last post January 12, 2025, 0752 UTC
by Ray Lalleu
0 Replies
397 Views
Last post January 26, 2022, 1408 UTC
by Ray Lalleu
0 Replies
416 Views
Last post May 11, 2020, 0954 UTC
by Ray Lalleu
0 Replies
661 Views
Last post June 12, 2019, 1853 UTC
by Ray Lalleu
0 Replies
243 Views
Last post April 24, 2025, 0749 UTC
by Ray Lalleu
0 Replies
424 Views
Last post October 19, 2019, 0806 UTC
by Ray Lalleu
0 Replies
229 Views
Last post October 12, 2024, 2021 UTC
by Ray Lalleu
0 Replies
463 Views
Last post February 03, 2019, 1519 UTC
by Ray Lalleu
0 Replies
206 Views
Last post August 12, 2023, 1720 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