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
3 Replies
679 Views
Last post October 15, 2022, 1237 UTC
by Skipmuck
6 Replies
1690 Views
Last post October 11, 2015, 2155 UTC
by ByteBORG
5 Replies
1474 Views
Last post November 22, 2014, 2124 UTC
by Tuco
3 Replies
1645 Views
Last post April 17, 2015, 0014 UTC
by ChrisSmolinski
0 Replies
993 Views
Last post November 24, 2013, 1742 UTC
by ChrisLobdell
5 Replies
644 Views
Last post February 17, 2024, 1726 UTC
by dxwingr
8 Replies
1497 Views
Last post October 22, 2023, 0145 UTC
by N2MLP
1 Replies
1624 Views
Last post March 24, 2012, 0208 UTC
by zackers
2 Replies
785 Views
Last post September 28, 2019, 1957 UTC
by Andrew Yoder
0 Replies
929 Views
Last post October 05, 2017, 0214 UTC
by ChrisLobdell
1 Replies
526 Views
Last post December 25, 2022, 2054 UTC
by Shortwave_Listener
4 Replies
822 Views
Last post February 03, 2024, 1806 UTC
by N2MLP
3 Replies
1269 Views
Last post November 05, 2017, 1356 UTC
by Skipmuck
12 Replies
4237 Views
Last post October 28, 2015, 1523 UTC
by ChrisSmolinski
10 Replies
2388 Views
Last post June 10, 2025, 0140 UTC
by William Hassig
1 Replies
514 Views
Last post January 15, 2023, 2127 UTC
by Ray Lalleu
3 Replies
684 Views
Last post June 11, 2023, 0525 UTC
by Grumpy Grandpa
7 Replies
1172 Views
Last post July 26, 2021, 0237 UTC
by DeepBlue
9 Replies
1197 Views
Last post April 21, 2022, 1618 UTC
by skyman
3 Replies
1698 Views
Last post September 06, 2015, 2124 UTC
by Crellitor

 

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