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
365 Views
Last post March 04, 2023, 0412 UTC
by Shortwave_Listener
4 Replies
781 Views
Last post February 04, 2023, 0316 UTC
by myteaquinn
5 Replies
478 Views
Last post August 17, 2023, 2015 UTC
by Ron Hunsicker
5 Replies
1844 Views
Last post March 05, 2025, 2309 UTC
by Charlie_Dont_Surf
6 Replies
725 Views
Last post October 14, 2024, 1449 UTC
by N2MLP
2 Replies
523 Views
Last post May 30, 2023, 0228 UTC
by Shortwave_Listener
7 Replies
993 Views
Last post October 09, 2022, 0430 UTC
by Syck0
1 Replies
499 Views
Last post January 01, 2023, 1814 UTC
by MDK2
0 Replies
422 Views
Last post March 23, 2023, 0239 UTC
by Shortwave_Listener
0 Replies
363 Views
Last post July 02, 2023, 0600 UTC
by Shortwave_Listener
8 Replies
1138 Views
Last post May 27, 2023, 2347 UTC
by ~SIGINT~
12 Replies
1315 Views
Last post March 19, 2023, 0358 UTC
by zambo
5 Replies
648 Views
Last post November 01, 2024, 0435 UTC
by RPIshortwave
0 Replies
323 Views
Last post June 27, 2023, 0655 UTC
by Shortwave_Listener
5 Replies
765 Views
Last post May 22, 2022, 0304 UTC
by Bali_Frank
5 Replies
980 Views
Last post September 30, 2022, 1554 UTC
by ChrisSmolinski
2 Replies
503 Views
Last post April 11, 2023, 0505 UTC
by Skipmuck
14 Replies
1437 Views
Last post December 03, 2023, 0111 UTC
by Paul65
2 Replies
585 Views
Last post February 19, 2025, 0205 UTC
by myteaquinn
1 Replies
681 Views
Last post November 02, 2023, 0158 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 Garden Flag
by MitchellTimeDesigns