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
8 Replies
4360 Views
Last post December 18, 2012, 0154 UTC
by skeezix
3 Replies
2244 Views
Last post April 12, 2017, 1348 UTC
by Teotwaki
0 Replies
1037 Views
Last post October 21, 2016, 1600 UTC
by CaptainGreenBeans
0 Replies
1590 Views
Last post October 14, 2014, 1416 UTC
by Ary-B
0 Replies
1435 Views
Last post September 18, 2014, 0453 UTC
by AbnersFarm
Gulfstream IV aircraft

Started by crossfire

3 Replies
2503 Views
Last post October 28, 2012, 0231 UTC
by crossfire
2 Replies
901 Views
Last post October 06, 2023, 0908 UTC
by TRI International
2 Replies
1794 Views
Last post March 08, 2013, 0439 UTC
by glimmer twin
1 Replies
532 Views
Last post May 10, 2024, 0246 UTC
by Shortwave_Listener
0 Replies
1420 Views
Last post March 08, 2013, 0230 UTC
by Cornelius
2 Replies
1032 Views
Last post March 27, 2019, 1810 UTC
by Josh
3 Replies
2472 Views
Last post March 08, 2013, 0251 UTC
by jFarley
6 Replies
3653 Views
Last post March 09, 2013, 0114 UTC
by jFarley
2 Replies
1798 Views
Last post April 02, 2019, 1913 UTC
by Strange Beacons
1 Replies
1024 Views
Last post March 26, 2022, 1928 UTC
by Sparx
0 Replies
554 Views
Last post January 13, 2025, 0624 UTC
by Robot Matrix
0 Replies
1493 Views
Last post July 11, 2017, 0041 UTC
by R4002
0 Replies
453 Views
Last post January 07, 2024, 0947 UTC
by RobRich
2 Replies
1081 Views
Last post December 14, 2022, 0220 UTC
by ~SIGINT~
2 Replies
704 Views
Last post September 24, 2022, 0430 UTC
by AbnersFarm

 

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