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
1153 Views
Last post September 27, 2016, 2026 UTC
by Paul B. Walker, Jr.
0 Replies
1067 Views
Last post August 05, 2016, 0822 UTC
by Paul B. Walker, Jr.
3 Replies
2210 Views
Last post May 30, 2016, 2232 UTC
by Paul B. Walker, Jr.
0 Replies
1041 Views
Last post October 29, 2016, 0114 UTC
by Paul B. Walker, Jr.
0 Replies
752 Views
Last post February 03, 2020, 0914 UTC
by kris
0 Replies
236 Views
Last post October 26, 2025, 0821 UTC
by TRI International
0 Replies
158 Views
Last post November 14, 2025, 1045 UTC
by TRI International
1 Replies
962 Views
Last post April 30, 2019, 2128 UTC
by RainBrandy
0 Replies
838 Views
Last post June 20, 2022, 2053 UTC
by Ray Lalleu
1 Replies
914 Views
Last post June 30, 2018, 2353 UTC
by Ray Lalleu
1 Replies
902 Views
Last post July 01, 2018, 0002 UTC
by Ray Lalleu
0 Replies
433 Views
Last post November 23, 2024, 0959 UTC
by TRI International
0 Replies
617 Views
Last post September 21, 2020, 2106 UTC
by Skipmuck
0 Replies
654 Views
Last post February 07, 2022, 1705 UTC
by Ct Yankee
0 Replies
480 Views
Last post September 25, 2025, 2006 UTC
by Tony_Pavick
0 Replies
714 Views
Last post June 24, 2022, 1312 UTC
by ~SIGINT~
0 Replies
2962 Views
Last post September 29, 2011, 2343 UTC
by mondomusique
0 Replies
802 Views
Last post April 28, 2022, 1936 UTC
by ShortwaveRadio.de
0 Replies
822 Views
Last post December 25, 2018, 1920 UTC
by ChrisSmolinski
4 Replies
1928 Views
Last post November 03, 2017, 2104 UTC
by Skipmuck

 

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