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
5 Replies
876 Views
Last post January 26, 2024, 1628 UTC
by ~SIGINT~
0 Replies
307 Views
Last post December 09, 2022, 1522 UTC
by Ct Yankee
9 Replies
1097 Views
Last post February 26, 2023, 1624 UTC
by Pigmeat
3 Replies
670 Views
Last post December 29, 2022, 1531 UTC
by Bali_Frank
0 Replies
292 Views
Last post October 25, 2024, 1131 UTC
by ChrisSmolinski
1 Replies
1158 Views
Last post June 17, 2017, 1507 UTC
by refmo
0 Replies
325 Views
Last post January 06, 2024, 1802 UTC
by ChrisSmolinski
2 Replies
636 Views
Last post September 19, 2021, 1506 UTC
by myteaquinn
1 Replies
426 Views
Last post December 14, 2022, 1455 UTC
by ChrisSmolinski
0 Replies
144 Views
Last post July 21, 2025, 1242 UTC
by ChrisSmolinski
4 Replies
786 Views
Last post March 05, 2023, 1521 UTC
by hsmith77
0 Replies
323 Views
Last post January 13, 2024, 1604 UTC
by ChrisSmolinski
5 Replies
836 Views
Last post September 25, 2022, 1505 UTC
by Chuck54
3 Replies
784 Views
Last post January 28, 2022, 1444 UTC
by TRI International
0 Replies
608 Views
Last post March 11, 2017, 1830 UTC
by ChrisSmolinski
2 Replies
474 Views
Last post July 02, 2023, 1402 UTC
by DangerKitty
4 Replies
1770 Views
Last post March 05, 2017, 1349 UTC
by Skipmuck
6 Replies
1034 Views
Last post January 29, 2023, 1401 UTC
by hammarhead
0 Replies
349 Views
Last post March 10, 2024, 1836 UTC
by ChrisSmolinski
1 Replies
367 Views
Last post February 15, 2023, 1258 UTC
by ChrisSmolinski

 

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