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
9 Replies
1023 Views
Last post February 19, 2023, 0122 UTC
by blw
3 Replies
570 Views
Last post July 29, 2023, 0729 UTC
by Charlie_Dont_Surf
3 Replies
512 Views
Last post May 13, 2023, 0207 UTC
by Sarge94
10 Replies
1042 Views
Last post April 09, 2023, 0220 UTC
by Dr. Strangelove
5 Replies
869 Views
Last post December 19, 2022, 0346 UTC
by Markokpik
6 Replies
967 Views
Last post June 17, 2023, 1310 UTC
by ChrisSmolinski
3 Replies
757 Views
Last post October 04, 2023, 1851 UTC
by ChrisSmolinski
0 Replies
375 Views
Last post July 16, 2023, 0543 UTC
by Shortwave_Listener
0 Replies
656 Views
Last post February 12, 2025, 0228 UTC
by Shortwave_Listener
5 Replies
716 Views
Last post June 11, 2023, 0531 UTC
by Shortwave_Listener
7 Replies
861 Views
Last post September 30, 2023, 0347 UTC
by ~SIGINT~
16 Replies
1492 Views
Last post June 19, 2022, 0057 UTC
by FelixChapel
8 Replies
1461 Views
Last post October 29, 2023, 2128 UTC
by KMD3HR
1 Replies
415 Views
Last post September 09, 2024, 0132 UTC
by myteaquinn
5 Replies
847 Views
Last post April 29, 2023, 0335 UTC
by canswl
0 Replies
332 Views
Last post October 15, 2022, 0258 UTC
by Shortwave_Listener
7 Replies
1282 Views
Last post November 20, 2023, 1439 UTC
by ChrisSmolinski
5 Replies
885 Views
Last post March 27, 2023, 2242 UTC
by Big Badfish Al
5 Replies
628 Views
Last post March 02, 2025, 0300 UTC
by Professor
1 Replies
309 Views
Last post April 19, 2023, 0420 UTC
by canswl

 

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

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground T-Shirt
by MitchellTimeDesigns