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
802 Views
Last post March 26, 2022, 2023 UTC
by dxace1
0 Replies
709 Views
Last post April 02, 2022, 1547 UTC
by TRI International
1 Replies
803 Views
Last post April 01, 2022, 2049 UTC
by kris
3 Replies
1215 Views
Last post January 28, 2021, 1022 UTC
by kris
0 Replies
835 Views
Last post March 04, 2023, 1209 UTC
by TRI International
1 Replies
815 Views
Last post December 31, 2023, 0957 UTC
by tiNG
0 Replies
832 Views
Last post September 19, 2023, 1043 UTC
by TRI International
2 Replies
1611 Views
Last post June 25, 2024, 2301 UTC
by kris
2 Replies
1097 Views
Last post March 06, 2023, 1156 UTC
by kris
1 Replies
668 Views
Last post August 16, 2023, 1613 UTC
by Shortwave_Listener
2 Replies
915 Views
Last post September 22, 2024, 2055 UTC
by kris
2 Replies
2163 Views
Last post May 16, 2021, 2122 UTC
by ChrisSmolinski
8 Replies
10642 Views
Last post September 28, 2019, 0959 UTC
by Rurik
1 Replies
805 Views
Last post September 26, 2022, 2235 UTC
by kris
2 Replies
1330 Views
Last post December 05, 2018, 1349 UTC
by Sealord
0 Replies
834 Views
Last post February 12, 2023, 1959 UTC
by kris
0 Replies
696 Views
Last post March 26, 2022, 2050 UTC
by kris
13 Replies
4926 Views
Last post July 14, 2019, 2026 UTC
by Rurik
2 Replies
1675 Views
Last post December 06, 2018, 1556 UTC
by R4002
7 Replies
3291 Views
Last post February 28, 2019, 1542 UTC
by R4002

 

Normal Topic
Hot Topic (More than 15 replies)
Very Hot Topic (More than 25 replies)

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground Garden Flag
by MitchellTimeDesigns