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
623 Views
Last post November 07, 2015, 1621 UTC
by ChrisSmolinski
4 Replies
651 Views
Last post September 17, 2023, 2119 UTC
by dxwingr
1 Replies
742 Views
Last post September 09, 2018, 2206 UTC
by Skipmuck
28 Replies
4276 Views
Last post September 15, 2018, 0046 UTC
by MDK2
17 Replies
1890 Views
Last post September 16, 2023, 0008 UTC
by dxace1
7 Replies
1700 Views
Last post April 23, 2017, 1444 UTC
by ChrisSmolinski
1 Replies
674 Views
Last post November 23, 2020, 0328 UTC
by Chuck54
15 Replies
4615 Views
Last post November 16, 2015, 1345 UTC
by ChrisSmolinski
1 Replies
656 Views
Last post June 28, 2020, 0211 UTC
by MDK2
4 Replies
1645 Views
Last post January 26, 2020, 0340 UTC
by oar9fi
3 Replies
549 Views
Last post December 07, 2022, 0258 UTC
by dxbill
3 Replies
1640 Views
Last post November 27, 2015, 0241 UTC
by Mentholyptus
0 Replies
649 Views
Last post February 07, 2016, 0121 UTC
by ChrisSmolinski
0 Replies
782 Views
Last post September 26, 2013, 1221 UTC
by ChrisSmolinski
0 Replies
458 Views
Last post April 24, 2025, 0106 UTC
by Quasar
7 Replies
659 Views
Last post April 16, 2025, 0250 UTC
by hflstnr
4 Replies
529 Views
Last post May 02, 2025, 0434 UTC
by Radiouser
1 Replies
316 Views
Last post June 21, 2025, 1841 UTC
by ChrisSmolinski
1 Replies
814 Views
Last post October 30, 2019, 2025 UTC
by WWBR
1 Replies
1029 Views
Last post June 28, 2014, 1441 UTC
by ByteBORG

 

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