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
1830 Views
Last post July 02, 2018, 0022 UTC
by Token
0 Replies
1952 Views
Last post July 03, 2018, 0547 UTC
by PresentedIn4D
0 Replies
1792 Views
Last post July 03, 2020, 1303 UTC
by chanito
0 Replies
1995 Views
Last post January 29, 2025, 0313 UTC
by Token
0 Replies
1642 Views
Last post July 17, 2018, 0224 UTC
by Token
0 Replies
1279 Views
Last post July 29, 2024, 0840 UTC
by UtilitySeattle
0 Replies
1803 Views
Last post October 08, 2018, 1251 UTC
by Token
0 Replies
1769 Views
Last post February 20, 2021, 1452 UTC
by alleycat
0 Replies
1751 Views
Last post October 26, 2018, 0521 UTC
by bumbelstock
0 Replies
1665 Views
Last post September 30, 2019, 1533 UTC
by Boriken
0 Replies
1084 Views
Last post October 28, 2022, 0027 UTC
by ~SIGINT~
0 Replies
2615 Views
Last post November 03, 2024, 1500 UTC
by Token
0 Replies
1341 Views
Last post December 19, 2022, 0038 UTC
by ~SIGINT~
0 Replies
2786 Views
Last post October 21, 2019, 0246 UTC
by Token
0 Replies
1984 Views
Last post August 12, 2020, 2256 UTC
by Token
0 Replies
2113 Views
Last post December 31, 2018, 1752 UTC
by Token
0 Replies
1980 Views
Last post September 09, 2020, 0124 UTC
by Traveling Wave
0 Replies
3193 Views
Last post January 07, 2019, 2049 UTC
by wwwpena
1 Replies
2555 Views
Last post April 15, 2023, 0812 UTC
by l0ngwire
1 Replies
2887 Views
Last post June 26, 2020, 0104 UTC
by Token

 

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

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground Garden Flag
by MitchellTimeDesigns