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
7 Replies
761 Views
Last post August 23, 2024, 2137 UTC
by Fisherman
0 Replies
335 Views
Last post April 16, 2023, 1140 UTC
by m3ozp1
2 Replies
345 Views
Last post December 25, 2023, 1147 UTC
by TRI International
0 Replies
588 Views
Last post February 25, 2025, 2335 UTC
by m3ozp1
0 Replies
241 Views
Last post January 26, 2025, 1512 UTC
by m3ozp1
0 Replies
191 Views
Last post July 05, 2025, 1022 UTC
by m3ozp1
3 Replies
545 Views
Last post June 23, 2024, 1826 UTC
by Ray Lalleu
3 Replies
1638 Views
Last post November 05, 2017, 1401 UTC
by Evil Elvis
1 Replies
527 Views
Last post February 15, 2020, 1049 UTC
by Ray Lalleu
0 Replies
538 Views
Last post January 25, 2020, 1319 UTC
by lilixp
4 Replies
781 Views
Last post May 11, 2019, 1831 UTC
by dxace1
1 Replies
507 Views
Last post December 29, 2019, 1459 UTC
by Ray Lalleu
1 Replies
541 Views
Last post October 12, 2018, 1448 UTC
by Ray Lalleu
1 Replies
472 Views
Last post December 29, 2019, 1456 UTC
by Ray Lalleu
2 Replies
659 Views
Last post October 31, 2019, 1540 UTC
by Misti-Radio
2 Replies
628 Views
Last post December 29, 2019, 1424 UTC
by Tudor Vedeanu
1 Replies
532 Views
Last post October 31, 2019, 1537 UTC
by Ray Lalleu
1 Replies
517 Views
Last post December 29, 2019, 1420 UTC
by Ray Lalleu
0 Replies
417 Views
Last post March 02, 2020, 1614 UTC
by lilixp
0 Replies
487 Views
Last post October 11, 2018, 1555 UTC
by lilixp

 

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