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
1 Replies
3203 Views
Last post April 27, 2015, 1934 UTC
by redhat
37 Replies
28782 Views
Last post November 11, 2014, 2118 UTC
by RobRich
5 Replies
2782 Views
Last post June 21, 2025, 0655 UTC
by Pigmeat
2 Replies
1973 Views
Last post July 27, 2022, 2128 UTC
by David_Lightman
2 Replies
8433 Views
Last post September 30, 2011, 1240 UTC
by ChrisSmolinski
0 Replies
1438 Views
Last post September 13, 2022, 1444 UTC
by kris
3 Replies
3653 Views
Last post May 16, 2022, 0039 UTC
by kris
5 Replies
1935 Views
Last post November 12, 2019, 1834 UTC
by pinto vortando
2 Replies
2514 Views
Last post May 10, 2015, 1949 UTC
by TomCat4680
2 Replies
2417 Views
Last post December 05, 2014, 0037 UTC
by warner
0 Replies
8328 Views
Last post November 02, 2013, 1600 UTC
by skeezix
2 Replies
1663 Views
Last post December 01, 2019, 1557 UTC
by pinto vortando
14 Replies
10987 Views
Last post September 29, 2011, 2337 UTC
by Dxer92
31 Replies
19144 Views
Last post September 08, 2012, 0919 UTC
by Zoidberg
11 Replies
3737 Views
Last post August 21, 2018, 1607 UTC
by ThaDood
2 Replies
2851 Views
Last post August 22, 2017, 2243 UTC
by VK3BVW
5 Replies
8408 Views
Last post March 24, 2015, 1019 UTC
by IZ5PQT
5 Replies
2584 Views
Last post July 15, 2020, 0618 UTC
by Stretchyman
4 Replies
4895 Views
Last post January 24, 2016, 0005 UTC
by syfr
High inverted V or low loop for SWL

Started by bandarr3000

13 Replies
5669 Views
Last post October 30, 2018, 1949 UTC
by Josh

 

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