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
7 Replies
888 Views
Last post July 17, 2022, 0334 UTC
by bfrederi
11 Replies
1153 Views
Last post August 14, 2022, 0425 UTC
by Markokpik
6 Replies
951 Views
Last post June 25, 2022, 0340 UTC
by refmo
14 Replies
1822 Views
Last post July 03, 2022, 0046 UTC
by Dr. Strangelove
13 Replies
1477 Views
Last post May 29, 2022, 0408 UTC
by dxbill
4 Replies
613 Views
Last post August 28, 2022, 0254 UTC
by Dr. Strangelove
2 Replies
823 Views
Last post February 17, 2022, 0200 UTC
by Erik Mattson
5 Replies
896 Views
Last post May 31, 2022, 0855 UTC
by Syck0
4 Replies
268 Views
Last post October 02, 2025, 0139 UTC
by sw77
9 Replies
1153 Views
Last post May 06, 2024, 0856 UTC
by N2MLP
9 Replies
1319 Views
Last post May 18, 2023, 0159 UTC
by dxbill
11 Replies
1264 Views
Last post April 20, 2023, 0241 UTC
by Grumpy Grandpa
7 Replies
1092 Views
Last post July 28, 2022, 0204 UTC
by Cross the Rubicon
2 Replies
723 Views
Last post December 06, 2021, 0144 UTC
by Bali_Frank
9 Replies
1649 Views
Last post September 25, 2023, 0308 UTC
by myteaquinn
14 Replies
1768 Views
Last post May 20, 2023, 1335 UTC
by Sealord
2 Replies
1109 Views
Last post May 15, 2024, 0046 UTC
by Skipmuck
19 Replies
1455 Views
Last post December 26, 2024, 1616 UTC
by N2MLP
1 Replies
584 Views
Last post August 22, 2020, 0022 UTC
by Bali_Frank
10 Replies
1419 Views
Last post May 19, 2024, 0258 UTC
by ChrisLobdell

 

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