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
307 Views
Last post February 13, 2024, 0948 UTC
by Fisherman
0 Replies
122 Views
Last post February 15, 2025, 1634 UTC
by Ray Lalleu
0 Replies
312 Views
Last post March 21, 2020, 0826 UTC
by Ray Lalleu
0 Replies
288 Views
Last post December 13, 2020, 1417 UTC
by Ray Lalleu
1 Replies
463 Views
Last post November 21, 2021, 0957 UTC
by Grey Fox
0 Replies
431 Views
Last post August 25, 2018, 2037 UTC
by Ray Lalleu
1 Replies
463 Views
Last post May 28, 2022, 1844 UTC
by TRI International
0 Replies
392 Views
Last post May 25, 2019, 0634 UTC
by Ray Lalleu
0 Replies
349 Views
Last post March 14, 2021, 1319 UTC
by Ray Lalleu
0 Replies
324 Views
Last post February 09, 2023, 1640 UTC
by Ray Lalleu
0 Replies
137 Views
Last post December 29, 2024, 0940 UTC
by Ray Lalleu
0 Replies
336 Views
Last post February 02, 2020, 1313 UTC
by Ray Lalleu
9 Replies
1299 Views
Last post October 10, 2021, 0142 UTC
by atrainradio
0 Replies
241 Views
Last post October 03, 2023, 1752 UTC
by Ray Lalleu
1 Replies
580 Views
Last post June 19, 2018, 1912 UTC
by KaySeeks
0 Replies
366 Views
Last post October 04, 2019, 1702 UTC
by Ray Lalleu
1 Replies
436 Views
Last post June 25, 2021, 1909 UTC
by dxace1
1 Replies
386 Views
Last post April 17, 2022, 0901 UTC
by Bali_Frank
0 Replies
244 Views
Last post June 01, 2023, 2111 UTC
by Ray Lalleu
1 Replies
179 Views
Last post April 11, 2025, 2002 UTC
by kris

 

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