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
9 Replies
874 Views
Last post May 05, 2025, 0250 UTC
by Nielsbo
8 Replies
1478 Views
Last post July 04, 2021, 2148 UTC
by WPE6HET
8 Replies
2194 Views
Last post November 28, 2013, 2143 UTC
by glimmer twin
8 Replies
1098 Views
Last post November 14, 2024, 0244 UTC
by Quasar
5 Replies
796 Views
Last post August 09, 2024, 1208 UTC
by ChrisSmolinski
7 Replies
791 Views
Last post September 14, 2024, 1519 UTC
by N2MLP
18 Replies
2856 Views
Last post May 10, 2025, 0326 UTC
by dxace1
9 Replies
1474 Views
Last post April 20, 2020, 0247 UTC
by dxace1
14 Replies
2438 Views
Last post March 23, 2020, 0105 UTC
by Andrew Yoder
5 Replies
780 Views
Last post August 13, 2022, 0222 UTC
by Bali_Frank
7 Replies
904 Views
Last post February 17, 2025, 0216 UTC
by Charlie_Dont_Surf
2 Replies
1284 Views
Last post January 22, 2018, 1915 UTC
by ChrisSmolinski
3 Replies
2218 Views
Last post September 25, 2017, 2212 UTC
by myteaquinn
2 Replies
460 Views
Last post October 30, 2022, 2124 UTC
by Bali_Frank
14 Replies
1746 Views
Last post July 03, 2022, 0046 UTC
by Dr. Strangelove
9 Replies
630 Views
Last post February 22, 2025, 0313 UTC
by canswl
3 Replies
795 Views
Last post March 26, 2022, 0436 UTC
by ~SIGINT~
11 Replies
1029 Views
Last post March 10, 2024, 0341 UTC
by dxace1
4 Replies
2099 Views
Last post June 16, 2025, 0114 UTC
by J. Carlos Pérez Montero
3 Replies
1154 Views
Last post May 04, 2019, 1635 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