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
398 Views
Last post July 05, 2023, 1330 UTC
by ChrisSmolinski
11 Replies
2140 Views
Last post July 06, 2023, 0103 UTC
by NAPRSSW
7 Replies
987 Views
Last post July 04, 2023, 2330 UTC
by Rob.
11 Replies
1683 Views
Last post November 01, 2020, 1206 UTC
by ✠ Blue Max
2 Replies
2119 Views
Last post July 07, 2012, 1844 UTC
by ChrisSmolinski
12 Replies
813 Views
Last post October 11, 2025, 1322 UTC
by Big Badfish Al
14 Replies
605 Views
Last post October 11, 2025, 2248 UTC
by Treehouse SWL
12 Replies
917 Views
Last post October 23, 2025, 2004 UTC
by ChrisSmolinski
3 Replies
870 Views
Last post February 12, 2021, 0437 UTC
by n4mxzimbabwe
4 Replies
1874 Views
Last post April 16, 2013, 0258 UTC
by hsmith77
5 Replies
1689 Views
Last post April 26, 2013, 2246 UTC
by rdla4
12 Replies
638 Views
Last post October 26, 2025, 1105 UTC
by ChrisSmolinski
3 Replies
1315 Views
Last post July 02, 2019, 1226 UTC
by ChrisSmolinski
KAOS 6925

Started by rdla4

13 Replies
3925 Views
Last post October 16, 2012, 0746 UTC
by Gino Italy
7 Replies
2145 Views
Last post March 10, 2012, 0309 UTC
by corq
6 Replies
1745 Views
Last post August 05, 2012, 0027 UTC
by Zane
10 Replies
2611 Views
Last post February 18, 2013, 0011 UTC
by glimmer twin
12 Replies
5872 Views
Last post March 23, 2014, 1033 UTC
by Gino Italy
12 Replies
1818 Views
Last post July 04, 2019, 1553 UTC
by digitalmod
5 Replies
1695 Views
Last post July 04, 2019, 0220 UTC
by digitalmod

 

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