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
IEEE DySPAN

Started by Fansome

0 Replies
2598 Views
Last post October 07, 2008, 2002 UTC
by Fansome
0 Replies
617 Views
Last post July 17, 2020, 1706 UTC
by Fansome
9 Replies
2692 Views
Last post May 15, 2014, 0420 UTC
by John Poet
4 Replies
1421 Views
Last post December 30, 2021, 2316 UTC
by Erik Mattson
1 Replies
1565 Views
Last post July 23, 2013, 0839 UTC
by taschenrechner
5 Replies
6453 Views
Last post October 16, 2013, 2335 UTC
by RCCI
8 Replies
6123 Views
Last post November 02, 2013, 1210 UTC
by Echo_One
0 Replies
754 Views
Last post August 15, 2020, 1319 UTC
by Ct Yankee
12 Replies
3628 Views
Last post March 10, 2017, 1351 UTC
by BoomboxDX
0 Replies
818 Views
Last post March 15, 2018, 2153 UTC
by Oliver
10 Replies
2935 Views
Last post March 05, 2018, 0149 UTC
by BoomboxDX
12 Replies
3933 Views
Last post May 10, 2017, 0720 UTC
by BoomboxDX
0 Replies
1089 Views
Last post January 13, 2017, 0129 UTC
by Fansome
0 Replies
986 Views
Last post November 21, 2022, 1603 UTC
by ChrisSmolinski
Important announcement!

Started by Fansome

5 Replies
2760 Views
Last post January 11, 2013, 1805 UTC
by ETM71
10 Replies
4472 Views
Last post January 15, 2017, 1937 UTC
by fpeconsultant
4 Replies
1796 Views
Last post April 13, 2019, 1830 UTC
by Josh
5 Replies
1430 Views
Last post October 20, 2022, 1012 UTC
by Pigmeat
2 Replies
1991 Views
Last post March 26, 2012, 1809 UTC
by Andrew Yoder
4 Replies
4713 Views
Last post November 08, 2011, 1050 UTC
by Newfoundland DXer

 

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