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
1000 Views
Last post March 25, 2013, 2058 UTC
by jFarley
0 Replies
857 Views
Last post July 25, 2017, 1435 UTC
by ChrisSmolinski
3 Replies
1709 Views
Last post July 23, 2014, 2327 UTC
by ByteBORG
2 Replies
718 Views
Last post June 13, 2022, 0326 UTC
by subrosa2
1 Replies
1039 Views
Last post July 23, 2016, 1414 UTC
by ChrisSmolinski
7 Replies
838 Views
Last post November 12, 2024, 0254 UTC
by Paul65
0 Replies
488 Views
Last post March 06, 2021, 1644 UTC
by ChrisSmolinski
1 Replies
1029 Views
Last post August 05, 2013, 2215 UTC
by Kilokat7
UNID 6925 USB 0235 UTC 10/31/16

Started by JoeFLIPS

2 Replies
4137 Views
Last post October 31, 2016, 1317 UTC
by ChrisSmolinski
0 Replies
891 Views
Last post October 10, 2015, 1420 UTC
by ChrisSmolinski
2 Replies
811 Views
Last post August 01, 2022, 0325 UTC
by ~SIGINT~
1 Replies
1401 Views
Last post June 17, 2017, 1436 UTC
by ChrisSmolinski
1 Replies
1265 Views
Last post April 29, 2016, 1819 UTC
by ChrisSmolinski
0 Replies
116 Views
Last post November 24, 2025, 1526 UTC
by ChrisSmolinski
1 Replies
1749 Views
Last post January 07, 2014, 0159 UTC
by mr. mike
UNID 6925 USB 0232 UTC 7/24/16

Started by JoeFLIPS

6 Replies
1486 Views
Last post July 24, 2016, 1639 UTC
by ChrisSmolinski
0 Replies
798 Views
Last post March 27, 2013, 1212 UTC
by ChrisSmolinski
7 Replies
1993 Views
Last post March 02, 2025, 1524 UTC
by N2MLP
2 Replies
614 Views
Last post January 17, 2023, 1642 UTC
by Pigmeat
5 Replies
2441 Views
Last post September 20, 2014, 2058 UTC
by jFarley

 

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