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
19 Replies
3514 Views
Last post February 09, 2020, 0201 UTC
by Markokpik
6 Replies
1271 Views
Last post March 01, 2020, 0421 UTC
by Andrew Yoder
4 Replies
906 Views
Last post February 29, 2020, 2252 UTC
by Skipmuck
5 Replies
1174 Views
Last post February 07, 2020, 0030 UTC
by dxace1
3 Replies
675 Views
Last post December 25, 2023, 0255 UTC
by J. Carlos Pérez Montero
20 Replies
4299 Views
Last post January 15, 2023, 1620 UTC
by Sealord
2 Replies
440 Views
Last post January 01, 2023, 0412 UTC
by Shortwave_Listener
3 Replies
859 Views
Last post August 19, 2020, 0157 UTC
by Molvania Poacher
4 Replies
1729 Views
Last post November 16, 2018, 1500 UTC
by Radio Station
0 Replies
589 Views
Last post December 12, 2021, 0156 UTC
by refmo
0 Replies
564 Views
Last post April 02, 2020, 2213 UTC
by Big Badfish Al
4 Replies
857 Views
Last post April 04, 2020, 0342 UTC
by elburndx
2 Replies
399 Views
Last post December 25, 2022, 1338 UTC
by Pigmeat
1 Replies
313 Views
Last post July 01, 2023, 0043 UTC
by N2MLP
4 Replies
1076 Views
Last post December 11, 2022, 0138 UTC
by Chuck54
5 Replies
569 Views
Last post April 08, 2023, 0334 UTC
by Shortwave_Listener
1 Replies
434 Views
Last post April 13, 2025, 0430 UTC
by Molvania Poacher
3 Replies
616 Views
Last post January 19, 2023, 0100 UTC
by ~SIGINT~
8 Replies
1345 Views
Last post October 23, 2022, 0103 UTC
by FelixChapel
9 Replies
989 Views
Last post December 16, 2022, 0106 UTC
by William Hassig

 

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