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
0 Replies
478 Views
Last post October 14, 2023, 1111 UTC
by TRI International
1 Replies
478 Views
Last post December 12, 2022, 2208 UTC
by kris
0 Replies
478 Views
Last post August 20, 2023, 2043 UTC
by europirate
0 Replies
478 Views
Last post January 13, 2023, 2102 UTC
by Ray Lalleu
0 Replies
478 Views
Last post August 01, 2023, 1929 UTC
by FOX
1 Replies
478 Views
Last post May 15, 2024, 2044 UTC
by europirate
0 Replies
478 Views
Last post April 10, 2022, 2117 UTC
by Ray Lalleu
1 Replies
479 Views
Last post January 08, 2023, 2249 UTC
by kris
0 Replies
479 Views
Last post June 03, 2025, 2050 UTC
by europirate
0 Replies
479 Views
Last post June 07, 2025, 2135 UTC
by FOX
0 Replies
479 Views
Last post August 06, 2023, 0957 UTC
by TRI International
1 Replies
479 Views
Last post October 05, 2022, 2358 UTC
by Ray Lalleu
0 Replies
479 Views
Last post September 28, 2022, 2125 UTC
by ralf_bender
0 Replies
479 Views
Last post October 19, 2023, 2034 UTC
by europirate
1 Replies
479 Views
Last post August 22, 2022, 2023 UTC
by Ray Lalleu
0 Replies
480 Views
Last post February 11, 2023, 1959 UTC
by Shortwave_Listener
0 Replies
480 Views
Last post November 08, 2023, 1847 UTC
by europirate
0 Replies
480 Views
Last post May 31, 2025, 0835 UTC
by TRI International
0 Replies
480 Views
Last post June 17, 2023, 2149 UTC
by m3ozp1
0 Replies
480 Views
Last post October 01, 2023, 2055 UTC
by ralf_bender

 

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