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
286 Views
Last post February 05, 2025, 1640 UTC
by Radiouser
4 Replies
564 Views
Last post February 04, 2025, 1737 UTC
by Radio Star
8 Replies
789 Views
Last post November 30, 2024, 1757 UTC
by flexoman61
0 Replies
265 Views
Last post August 22, 2023, 1648 UTC
by ChrisSmolinski
4 Replies
692 Views
Last post September 09, 2023, 2111 UTC
by Ron Hunsicker
3 Replies
350 Views
Last post March 25, 2025, 1729 UTC
by Sarge94
11 Replies
1064 Views
Last post November 19, 2023, 1826 UTC
by Mick Boyle
8 Replies
870 Views
Last post March 08, 2025, 1755 UTC
by Radio Star
1 Replies
279 Views
Last post August 04, 2023, 1720 UTC
by Ct Yankee
5 Replies
924 Views
Last post December 15, 2023, 1850 UTC
by Ct Yankee
4 Replies
721 Views
Last post January 14, 2024, 1740 UTC
by dxwingr
0 Replies
241 Views
Last post August 19, 2023, 1357 UTC
by ChrisSmolinski
1 Replies
290 Views
Last post August 18, 2023, 1746 UTC
by Ct Yankee
9 Replies
812 Views
Last post December 23, 2023, 1852 UTC
by autovon
9 Replies
961 Views
Last post January 15, 2025, 1911 UTC
by myteaquinn
3 Replies
347 Views
Last post March 29, 2025, 1824 UTC
by Radiouser
3 Replies
372 Views
Last post April 12, 2025, 1833 UTC
by TRI International
8 Replies
1802 Views
Last post November 06, 2023, 1905 UTC
by Ron Hunsicker
12 Replies
724 Views
Last post December 22, 2024, 1928 UTC
by Skipmuck
4 Replies
576 Views
Last post April 02, 2024, 1855 UTC
by dxwingr

 

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