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
414 Views
Last post January 28, 2023, 0527 UTC
by Shortwave_Listener
0 Replies
145 Views
Last post October 31, 2025, 2138 UTC
by europirate
0 Replies
432 Views
Last post February 08, 2025, 2121 UTC
by europirate
0 Replies
337 Views
Last post April 16, 2024, 2034 UTC
by europirate
0 Replies
405 Views
Last post February 12, 2024, 2153 UTC
by europirate
0 Replies
354 Views
Last post February 27, 2024, 2139 UTC
by europirate
0 Replies
495 Views
Last post February 20, 2025, 2057 UTC
by europirate
0 Replies
364 Views
Last post November 03, 2024, 2019 UTC
by europirate
0 Replies
339 Views
Last post April 07, 2024, 1917 UTC
by europirate
0 Replies
401 Views
Last post December 04, 2022, 1913 UTC
by Shortwave_Listener
1 Replies
552 Views
Last post December 04, 2022, 0111 UTC
by Shortwave_Listener
0 Replies
433 Views
Last post November 07, 2024, 2218 UTC
by europirate
0 Replies
245 Views
Last post October 20, 2025, 2015 UTC
by europirate
0 Replies
337 Views
Last post September 16, 2024, 1917 UTC
by europirate
0 Replies
358 Views
Last post February 05, 2024, 2142 UTC
by europirate
0 Replies
400 Views
Last post December 31, 2022, 1801 UTC
by Funkenblitz
0 Replies
110 Views
Last post November 07, 2025, 2249 UTC
by europirate
0 Replies
1099 Views
Last post April 11, 2021, 1520 UTC
by ChrisSmolinski
0 Replies
450 Views
Last post November 06, 2022, 0415 UTC
by Shortwave_Listener
0 Replies
377 Views
Last post April 16, 2024, 2037 UTC
by europirate

 

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