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
600 Views
Last post March 21, 2022, 1125 UTC
by ChrisSmolinski
1 Replies
600 Views
Last post April 02, 2024, 1238 UTC
by ChrisSmolinski
4 Replies
600 Views
Last post December 09, 2025, 0223 UTC
by PietariDX
0 Replies
600 Views
Last post March 29, 2024, 1717 UTC
by Skipmuck
1 Replies
600 Views
Last post July 20, 2022, 0542 UTC
by Shortwave_Listener
0 Replies
600 Views
Last post April 19, 2018, 1125 UTC
by ChrisSmolinski
0 Replies
600 Views
Last post January 23, 2021, 1615 UTC
by Skipmuck
0 Replies
600 Views
Last post December 24, 2020, 1341 UTC
by Skipmuck
2 Replies
600 Views
Last post September 30, 2024, 2235 UTC
by hflstnr
1 Replies
600 Views
Last post October 23, 2020, 2116 UTC
by PirateSWL
0 Replies
601 Views
Last post May 25, 2025, 1352 UTC
by ChrisSmolinski
0 Replies
601 Views
Last post June 25, 2019, 2224 UTC
by ChrisSmolinski
0 Replies
601 Views
Last post July 05, 2020, 0314 UTC
by Cold War CONELRAD
1 Replies
601 Views
Last post March 17, 2018, 2349 UTC
by Helicaster
4 Replies
601 Views
Last post September 14, 2025, 0026 UTC
by Radiouser
0 Replies
601 Views
Last post September 30, 2023, 1304 UTC
by ChrisSmolinski
2 Replies
601 Views
Last post April 08, 2023, 1255 UTC
by Bali_Frank
0 Replies
601 Views
Last post June 02, 2019, 2210 UTC
by ChrisSmolinski
3 Replies
601 Views
Last post September 23, 2023, 2020 UTC
by ~SIGINT~
5 Replies
601 Views
Last post April 18, 2023, 2325 UTC
by ~SIGINT~

 

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

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground T-Shirt
by MitchellTimeDesigns