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
536 Views
Last post December 17, 2023, 1412 UTC
by ChrisSmolinski
1 Replies
413 Views
Last post November 29, 2023, 1215 UTC
by ChrisSmolinski
1 Replies
576 Views
Last post November 28, 2024, 1510 UTC
by Nomadiq
7 Replies
1046 Views
Last post January 06, 2024, 2227 UTC
by N2MLP
8 Replies
4176 Views
Last post June 16, 2025, 0342 UTC
by dxace1
3 Replies
1156 Views
Last post May 20, 2025, 1140 UTC
by Ct Yankee
11 Replies
2550 Views
Last post May 21, 2025, 0137 UTC
by Molvania Poacher
4 Replies
1467 Views
Last post June 06, 2025, 2104 UTC
by N2MLP
1 Replies
1117 Views
Last post July 18, 2010, 2237 UTC
by John Poet
5 Replies
1424 Views
Last post November 11, 2020, 0417 UTC
by John Poet
8 Replies
2292 Views
Last post October 17, 2014, 0040 UTC
by blw
0 Replies
886 Views
Last post December 25, 2011, 1730 UTC
by ChrisSmolinski
2 Replies
573 Views
Last post April 30, 2023, 0212 UTC
by Molvania Poacher
12 Replies
1172 Views
Last post April 30, 2023, 0147 UTC
by William Hassig
7 Replies
1044 Views
Last post April 09, 2023, 0447 UTC
by canswl
6 Replies
719 Views
Last post October 19, 2024, 0229 UTC
by Dr. Strangelove
14 Replies
1245 Views
Last post April 30, 2023, 0134 UTC
by ~SIGINT~
2 Replies
379 Views
Last post April 19, 2023, 0201 UTC
by RobRich
9 Replies
892 Views
Last post October 14, 2023, 0437 UTC
by ~SIGINT~
6 Replies
1110 Views
Last post December 05, 2020, 2244 UTC
by elburndx

 

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