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
1507 Views
Last post September 21, 2016, 0023 UTC
by MDK2
1 Replies
2527 Views
Last post June 15, 2012, 2130 UTC
by ChrisSmolinski
1 Replies
1743 Views
Last post May 04, 2016, 0034 UTC
by Static_Mantra
0 Replies
739 Views
Last post February 04, 2023, 0634 UTC
by RobRich
0 Replies
1226 Views
Last post September 03, 2018, 1926 UTC
by kris
0 Replies
1558 Views
Last post March 20, 2017, 1054 UTC
by Humat
0 Replies
746 Views
Last post August 13, 2022, 1158 UTC
by ~SIGINT~
0 Replies
745 Views
Last post September 03, 2022, 2337 UTC
by kris
0 Replies
3292 Views
Last post October 03, 2015, 1738 UTC
by Dag
0 Replies
870 Views
Last post June 26, 2022, 0910 UTC
by TRI International
0 Replies
809 Views
Last post July 28, 2022, 0141 UTC
by ~SIGINT~
UNID 6930 LSB 0108 9/29/15

Started by JoeFLIPS

0 Replies
1159 Views
Last post September 29, 2015, 0109 UTC
by JoeFLIPS
0 Replies
1198 Views
Last post August 15, 2018, 1946 UTC
by KaySeeks
0 Replies
1964 Views
Last post September 26, 2015, 1102 UTC
by Dag
0 Replies
2830 Views
Last post September 17, 2015, 1615 UTC
by flexoman61
0 Replies
1072 Views
Last post June 21, 2022, 1720 UTC
by Magnitic
0 Replies
1285 Views
Last post June 17, 2022, 0412 UTC
by Matt_B
0 Replies
1616 Views
Last post September 12, 2015, 2331 UTC
by jFarley
0 Replies
1213 Views
Last post December 04, 2016, 2206 UTC
by ChrisSmolinski
0 Replies
909 Views
Last post March 21, 2023, 0645 UTC
by Shortwave_Listener

 

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