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
2 Replies
923 Views
Last post September 05, 2021, 1757 UTC
by Skipmuck
16 Replies
1684 Views
Last post January 07, 2025, 0112 UTC
by Sealord
9 Replies
1321 Views
Last post August 21, 2023, 0331 UTC
by Markokpik
18 Replies
2370 Views
Last post December 04, 2024, 2158 UTC
by autovon
20 Replies
1794 Views
Last post April 20, 2023, 1246 UTC
by ChrisSmolinski
5 Replies
854 Views
Last post April 08, 2024, 1135 UTC
by ChrisSmolinski
10 Replies
1529 Views
Last post September 10, 2021, 0303 UTC
by Traveling Wave
10 Replies
2491 Views
Last post June 07, 2025, 1457 UTC
by ChrisSmolinski
0 Replies
602 Views
Last post June 13, 2021, 0251 UTC
by dxace1
1 Replies
708 Views
Last post December 23, 2021, 0158 UTC
by Skipmuck
8 Replies
1385 Views
Last post June 08, 2020, 0350 UTC
by myteaquinn
2 Replies
1064 Views
Last post April 18, 2021, 1228 UTC
by ChrisSmolinski
26 Replies
2188 Views
Last post October 05, 2024, 0752 UTC
by RainBrandy
8 Replies
1361 Views
Last post September 26, 2024, 1313 UTC
by radio_cosmo
3 Replies
569 Views
Last post February 15, 2025, 2208 UTC
by hflstnr
5 Replies
1165 Views
Last post March 27, 2021, 2133 UTC
by caylorman
6 Replies
1160 Views
Last post February 16, 2022, 2244 UTC
by hsmith77
7 Replies
1026 Views
Last post January 29, 2024, 2210 UTC
by William Hassig
2 Replies
768 Views
Last post September 12, 2021, 2325 UTC
by Molvania Poacher
2 Replies
825 Views
Last post July 22, 2024, 0024 UTC
by hflstnr

 

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