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
505 Views
Last post December 16, 2020, 2134 UTC
by ChrisSmolinski
0 Replies
1328 Views
Last post July 06, 2009, 0041 UTC
by ChrisSmolinski
0 Replies
992 Views
Last post September 02, 2018, 1934 UTC
by ChrisSmolinski
2 Replies
1226 Views
Last post October 26, 2013, 0003 UTC
by jFarley
15 Replies
1472 Views
Last post December 30, 2024, 1547 UTC
by Ron Hunsicker
15 Replies
4510 Views
Last post November 14, 2015, 0224 UTC
by William Hassig
2 Replies
1197 Views
Last post December 28, 2014, 0150 UTC
by Andrew Yoder
1 Replies
1217 Views
Last post September 10, 2011, 0033 UTC
by textim
0 Replies
522 Views
Last post July 04, 2018, 1438 UTC
by ChrisSmolinski
1 Replies
933 Views
Last post October 01, 2013, 2027 UTC
by jFarley
0 Replies
1121 Views
Last post February 06, 2012, 0101 UTC
by ChrisSmolinski
0 Replies
514 Views
Last post June 10, 2020, 1159 UTC
by ChrisSmolinski
0 Replies
654 Views
Last post October 14, 2017, 1418 UTC
by ChrisSmolinski
0 Replies
802 Views
Last post December 22, 2012, 2002 UTC
by ChrisSmolinski
1 Replies
932 Views
Last post March 14, 2021, 1943 UTC
by Stretchyman
1 Replies
839 Views
Last post May 01, 2016, 1135 UTC
by JCMaxwell
3 Replies
1540 Views
Last post November 17, 2014, 0122 UTC
by Dick Weed
1 Replies
433 Views
Last post January 04, 2023, 1926 UTC
by ~SIGINT~
5 Replies
980 Views
Last post September 13, 2025, 1146 UTC
by Radiouser
4 Replies
837 Views
Last post August 13, 2023, 1829 UTC
by dxwingr

 

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