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
389 Views
Last post September 01, 2024, 2148 UTC
by kris
0 Replies
390 Views
Last post August 24, 2022, 2024 UTC
by Ray Lalleu
0 Replies
311 Views
Last post November 23, 2020, 1026 UTC
by Ray Lalleu
0 Replies
421 Views
Last post January 02, 2020, 1603 UTC
by Ray Lalleu
0 Replies
498 Views
Last post December 06, 2018, 1343 UTC
by Ray Lalleu
2 Replies
714 Views
Last post January 27, 2024, 1719 UTC
by Celticones
1 Replies
361 Views
Last post January 08, 2023, 1847 UTC
by Shortwave_Listener
1 Replies
506 Views
Last post February 04, 2022, 0929 UTC
by TRI International
1 Replies
551 Views
Last post February 20, 2021, 2000 UTC
by kris
0 Replies
383 Views
Last post May 17, 2020, 1551 UTC
by Ray Lalleu
1 Replies
323 Views
Last post April 27, 2024, 2337 UTC
by Panda_NL
1 Replies
432 Views
Last post August 28, 2020, 2235 UTC
by kris
0 Replies
437 Views
Last post July 21, 2018, 0921 UTC
by Ray Lalleu
1 Replies
167 Views
Last post August 04, 2025, 1950 UTC
by Alex BLR
1 Replies
498 Views
Last post February 29, 2020, 2051 UTC
by kris
0 Replies
187 Views
Last post January 22, 2025, 0842 UTC
by Ray Lalleu
1 Replies
715 Views
Last post April 04, 2021, 1810 UTC
by SV1XV
0 Replies
458 Views
Last post June 22, 2019, 2144 UTC
by Ray Lalleu
1 Replies
269 Views
Last post July 01, 2023, 1537 UTC
by ukdxer
0 Replies
342 Views
Last post June 17, 2022, 1620 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