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
2 Replies
768 Views
Last post February 20, 2025, 1933 UTC
by ChrisSmolinski
0 Replies
768 Views
Last post March 22, 2015, 1637 UTC
by ChrisSmolinski
5 Replies
768 Views
Last post April 21, 2023, 0215 UTC
by Shawndx
1 Replies
768 Views
Last post August 12, 2018, 1244 UTC
by ChrisSmolinski
0 Replies
768 Views
Last post May 26, 2019, 0114 UTC
by PirateSWL
3 Replies
768 Views
Last post June 06, 2020, 2103 UTC
by myteaquinn
3 Replies
768 Views
Last post December 27, 2019, 1921 UTC
by Ray Lalleu
5 Replies
768 Views
Last post November 11, 2022, 1333 UTC
by ChrisSmolinski
4 Replies
768 Views
Last post June 27, 2022, 2247 UTC
by Ray Lalleu
2 Replies
768 Views
Last post July 22, 2021, 0249 UTC
by ~SIGINT~
6 Replies
768 Views
Last post June 29, 2023, 0404 UTC
by MDK2
4 Replies
768 Views
Last post November 27, 2022, 2354 UTC
by JustGreg
2 Replies
768 Views
Last post July 04, 2020, 0115 UTC
by myteaquinn
3 Replies
767 Views
Last post December 08, 2022, 0309 UTC
by Charlie_Dont_Surf
1 Replies
767 Views
Last post November 21, 2020, 0443 UTC
by MDK2
8 Replies
767 Views
Last post November 10, 2025, 2244 UTC
by ZFT
0 Replies
767 Views
Last post October 08, 2017, 0229 UTC
by MDK2
3 Replies
767 Views
Last post March 27, 2022, 2126 UTC
by Sky Waves
6 Replies
767 Views
Last post October 29, 2024, 2219 UTC
by Treehouse SWL
0 Replies
767 Views
Last post April 10, 2021, 0207 UTC
by refmo

 

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