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
4 Replies
4865 Views
Last post July 11, 2025, 1205 UTC
by TRI International
0 Replies
1165 Views
Last post May 01, 2025, 1855 UTC
by ChrisSmolinski
0 Replies
1379 Views
Last post April 23, 2025, 1033 UTC
by tech53
1 Replies
3483 Views
Last post April 06, 2025, 0128 UTC
by bagmouse7
0 Replies
9767 Views
Last post December 22, 2024, 1635 UTC
by ChrisSmolinski
1 Replies
5070 Views
Last post December 04, 2024, 2135 UTC
by Erik Mattson
2 Replies
3636 Views
Last post November 10, 2024, 1832 UTC
by space junk radio
Sorcerer Issue

Started by NJ3H

1 Replies
4462 Views
Last post September 19, 2024, 2136 UTC
by NJ3H
2 Replies
8188 Views
Last post August 05, 2024, 1859 UTC
by ChrisSmolinski
0 Replies
4544 Views
Last post April 24, 2024, 1549 UTC
by lincdeckard
12 Replies
11883 Views
Last post April 17, 2024, 1658 UTC
by BriansBrain
3 Replies
5767 Views
Last post March 26, 2024, 1954 UTC
by europirate
0 Replies
3513 Views
Last post February 21, 2024, 2200 UTC
by ChrisSmolinski
1 Replies
6809 Views
Last post January 31, 2024, 1903 UTC
by cyphermatic
16 Replies
21295 Views
Last post September 17, 2023, 0656 UTC
by Charlie_Dont_Surf
1 Replies
4898 Views
Last post August 16, 2023, 0319 UTC
by mbott
7 Replies
9841 Views
Last post August 16, 2023, 0314 UTC
by mbott
5 Replies
10689 Views
Last post August 16, 2023, 0306 UTC
by mbott
OpenWebRX+

Started by Quinta

0 Replies
3845 Views
Last post July 20, 2023, 2309 UTC
by Quinta
0 Replies
3371 Views
Last post May 23, 2023, 2134 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 House Flag
by MitchellTimeDesigns