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
598 Views
Last post July 22, 2019, 1258 UTC
by ChrisSmolinski
5 Replies
598 Views
Last post October 31, 2024, 1148 UTC
by osiris
1 Replies
598 Views
Last post March 04, 2018, 1605 UTC
by ChrisSmolinski
1 Replies
598 Views
Last post May 30, 2021, 1241 UTC
by ChrisSmolinski
0 Replies
598 Views
Last post May 26, 2018, 1102 UTC
by Skipmuck
2 Replies
598 Views
Last post April 24, 2023, 0208 UTC
by Pigmeat
1 Replies
598 Views
Last post October 19, 2021, 1436 UTC
by Andrew Yoder
0 Replies
598 Views
Last post April 04, 2021, 0047 UTC
by refmo
2 Replies
598 Views
Last post October 25, 2021, 0021 UTC
by Bali_Frank
3 Replies
598 Views
Last post February 28, 2025, 1820 UTC
by Radiouser
1 Replies
598 Views
Last post May 15, 2022, 1444 UTC
by Pravotorov
6 Replies
598 Views
Last post June 18, 2023, 2213 UTC
by N2MLP
0 Replies
598 Views
Last post October 08, 2017, 1500 UTC
by ChrisSmolinski
4 Replies
598 Views
Last post April 16, 2023, 0509 UTC
by Shortwave_Listener
4 Replies
598 Views
Last post March 27, 2023, 1804 UTC
by Shortwave_Listener
2 Replies
598 Views
Last post March 02, 2022, 2114 UTC
by dxace1
4 Replies
598 Views
Last post June 20, 2023, 1404 UTC
by ~SIGINT~
0 Replies
598 Views
Last post May 16, 2019, 1145 UTC
by ChrisSmolinski
3 Replies
597 Views
Last post December 24, 2023, 2301 UTC
by myteaquinn
1 Replies
597 Views
Last post July 04, 2019, 2355 UTC
by ChrisSmolinski

 

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