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
919 Views
Last post February 13, 2016, 2200 UTC
by hsmith77
11 Replies
2408 Views
Last post November 03, 2018, 2255 UTC
by JohnS
1 Replies
427 Views
Last post September 05, 2024, 2157 UTC
by ChrisSmolinski
0 Replies
355 Views
Last post September 20, 2024, 1131 UTC
by ChrisSmolinski
3 Replies
1024 Views
Last post March 25, 2025, 2209 UTC
by N2MLP
5 Replies
853 Views
Last post July 01, 2024, 1227 UTC
by ChrisSmolinski
6 Replies
832 Views
Last post October 28, 2023, 2256 UTC
by myteaquinn
0 Replies
347 Views
Last post May 17, 2024, 2151 UTC
by Blackswan
3 Replies
632 Views
Last post March 03, 2025, 2156 UTC
by Radiouser
4 Replies
1112 Views
Last post April 12, 2018, 2219 UTC
by refmo
4 Replies
773 Views
Last post March 08, 2024, 2204 UTC
by Skipmuck
7 Replies
2058 Views
Last post December 08, 2018, 2225 UTC
by ChrisSmolinski
0 Replies
593 Views
Last post April 24, 2020, 2136 UTC
by Radio Star
2 Replies
471 Views
Last post September 14, 2023, 2145 UTC
by TRI International
0 Replies
676 Views
Last post November 06, 2018, 2132 UTC
by ChrisSmolinski
6 Replies
1465 Views
Last post March 16, 2019, 2145 UTC
by Markokpik
1 Replies
950 Views
Last post September 14, 2013, 2140 UTC
by jFarley
3 Replies
532 Views
Last post November 05, 2023, 2135 UTC
by Radio Star
3 Replies
749 Views
Last post January 27, 2022, 2149 UTC
by Traveling Wave
0 Replies
300 Views
Last post August 04, 2023, 1837 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