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
2 Replies
1180 Views
Last post March 29, 2019, 2047 UTC
by Pigmeat
1 Replies
1287 Views
Last post September 04, 2017, 1923 UTC
by Pigmeat
10 Replies
3322 Views
Last post January 08, 2017, 0049 UTC
by ve6jy
0 Replies
952 Views
Last post October 18, 2017, 1756 UTC
by MDK2
3 Replies
1346 Views
Last post August 02, 2018, 0044 UTC
by Terry
0 Replies
770 Views
Last post July 30, 2018, 1505 UTC
by MDK2
1 Replies
936 Views
Last post July 30, 2018, 1847 UTC
by Pigmeat
9 Replies
2874 Views
Last post May 12, 2021, 1050 UTC
by Looking-Glass
5 Replies
1629 Views
Last post December 26, 2016, 1611 UTC
by Pigmeat
0 Replies
1034 Views
Last post August 28, 2018, 1259 UTC
by MDK2
5 Replies
2331 Views
Last post July 25, 2017, 1707 UTC
by ChrisSmolinski
2 Replies
1059 Views
Last post May 05, 2018, 2231 UTC
by MDK2
1 Replies
840 Views
Last post December 19, 2016, 1821 UTC
by jFarley
4 Replies
3545 Views
Last post November 26, 2018, 2111 UTC
by MDK2
1 Replies
610 Views
Last post February 22, 2024, 0108 UTC
by skeezix
9 Replies
2901 Views
Last post May 23, 2017, 1819 UTC
by Stretchyman
2 Replies
1205 Views
Last post May 23, 2017, 0114 UTC
by MDK2
8 Replies
1686 Views
Last post March 27, 2025, 0254 UTC
by KnowFear
3 Replies
1335 Views
Last post December 19, 2023, 0345 UTC
by nitroengine
3 Replies
3999 Views
Last post December 22, 2010, 2057 UTC
by John Poet

 

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