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
424 Views
Last post June 11, 2022, 1707 UTC
by Shortwave_Listener
1 Replies
298 Views
Last post May 28, 2025, 1957 UTC
by Alex BLR
0 Replies
299 Views
Last post June 21, 2020, 0908 UTC
by Ray Lalleu
0 Replies
523 Views
Last post February 05, 2019, 2144 UTC
by Ray Lalleu
0 Replies
402 Views
Last post December 27, 2020, 0027 UTC
by Ray Lalleu
1 Replies
299 Views
Last post October 15, 2022, 1814 UTC
by Ray Lalleu
3 Replies
838 Views
Last post October 20, 2019, 0019 UTC
by Ray Lalleu
0 Replies
230 Views
Last post June 23, 2023, 2047 UTC
by Ray Lalleu
0 Replies
399 Views
Last post June 14, 2019, 1623 UTC
by Ray Lalleu
0 Replies
386 Views
Last post May 12, 2020, 1020 UTC
by Ray Lalleu
1 Replies
495 Views
Last post March 28, 2021, 2053 UTC
by kris
0 Replies
370 Views
Last post January 28, 2022, 1634 UTC
by Ray Lalleu
2 Replies
349 Views
Last post February 26, 2023, 1645 UTC
by Ray Lalleu
0 Replies
268 Views
Last post January 21, 2024, 1825 UTC
by Ray Lalleu
1 Replies
388 Views
Last post February 23, 2020, 1143 UTC
by dandan22
1 Replies
574 Views
Last post August 22, 2020, 2029 UTC
by kris
1 Replies
464 Views
Last post May 01, 2022, 1724 UTC
by Shortwave_Listener
1 Replies
361 Views
Last post April 20, 2024, 2044 UTC
by europirate
0 Replies
477 Views
Last post April 24, 2019, 1831 UTC
by Ray Lalleu
1 Replies
305 Views
Last post January 01, 2023, 0123 UTC
by Charlie_Dont_Surf

 

Normal Topic
Hot Topic (More than 15 replies)
Very Hot Topic (More than 25 replies)

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground House Flag
by MitchellTimeDesigns