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
2 Replies
1795 Views
Last post January 01, 2018, 1309 UTC
by ChrisSmolinski
2 Replies
1792 Views
Last post October 24, 2017, 2353 UTC
by Helicaster
0 Replies
1790 Views
Last post January 15, 2025, 0127 UTC
by n2avh
4 Replies
1784 Views
Last post February 19, 2018, 2313 UTC
by ChrisSmolinski
4 Replies
1763 Views
Last post April 27, 2024, 1356 UTC
by N2MLP
3 Replies
1762 Views
Last post January 27, 2019, 0009 UTC
by Jari Finland
5 Replies
1760 Views
Last post September 24, 2018, 2344 UTC
by Josh
5 Replies
1760 Views
Last post January 05, 2019, 1136 UTC
by Skipmuck
5 Replies
1758 Views
Last post March 23, 2023, 0023 UTC
by ~SIGINT~
2 Replies
1754 Views
Last post October 13, 2017, 0044 UTC
by Helicaster
3 Replies
1747 Views
Last post February 26, 2018, 0024 UTC
by PirateSWL
2 Replies
1742 Views
Last post October 26, 2023, 0148 UTC
by Shortwave_Listener
0 Replies
1737 Views
Last post September 30, 2017, 2247 UTC
by ChrisSmolinski
7 Replies
1735 Views
Last post October 30, 2024, 0107 UTC
by myteaquinn
0 Replies
1732 Views
Last post October 03, 2017, 2251 UTC
by ChrisSmolinski
0 Replies
1724 Views
Last post April 20, 2019, 1337 UTC
by Daniel Wyllyans
4 Replies
1723 Views
Last post January 15, 2018, 1009 UTC
by Daniel Wyllyans
0 Replies
1720 Views
Last post November 04, 2018, 2325 UTC
by andres87
0 Replies
1718 Views
Last post October 05, 2017, 1214 UTC
by ChrisSmolinski
0 Replies
1717 Views
Last post April 29, 2019, 2151 UTC
by Daniel Wyllyans

 

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