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
3250 Views
Last post March 19, 2017, 1402 UTC
by Skipmuck
1 Replies
2278 Views
Last post June 03, 2022, 0509 UTC
by Shortwave_Listener
1 Replies
1567 Views
Last post August 22, 2023, 1329 UTC
by uhf35
1 Replies
3212 Views
Last post December 10, 2016, 1022 UTC
by Daniel Wyllyans
1 Replies
3738 Views
Last post December 07, 2016, 1120 UTC
by Daniel Wyllyans
1 Replies
4621 Views
Last post June 09, 2025, 1007 UTC
by Jos
1 Replies
2492 Views
Last post November 16, 2017, 1516 UTC
by MDK2
1 Replies
2637 Views
Last post November 19, 2017, 0801 UTC
by Looking-Glass
1 Replies
3394 Views
Last post September 24, 2024, 2027 UTC
by Whonose123
1 Replies
2117 Views
Last post September 19, 2022, 2204 UTC
by Shortwave_Listener
1 Replies
4378 Views
Last post November 24, 2016, 2149 UTC
by linkz
1 Replies
2798 Views
Last post July 04, 2018, 1446 UTC
by Traveling Wave
1 Replies
2767 Views
Last post May 09, 2018, 1421 UTC
by MDK2
1 Replies
2477 Views
Last post May 04, 2018, 0057 UTC
by refmo
1 Replies
2880 Views
Last post April 14, 2018, 1210 UTC
by ulx2
1 Replies
3373 Views
Last post May 12, 2024, 0839 UTC
by prldx
1 Replies
2787 Views
Last post December 02, 2017, 1726 UTC
by ChrisSmolinski
2 Replies
1699 Views
Last post November 22, 2023, 1915 UTC
by KVKHFF (Andy)
2 Replies
2880 Views
Last post November 17, 2017, 0454 UTC
by Matt_B
2 Replies
1301 Views
Last post December 16, 2023, 2128 UTC
by TRI International

 

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