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
12 Replies
699 Views
Last post May 12, 2025, 0159 UTC
by Genius1
2 Replies
389 Views
Last post March 08, 2025, 0528 UTC
by myteaquinn
4 Replies
404 Views
Last post April 28, 2025, 0118 UTC
by Molvania Poacher
1 Replies
362 Views
Last post January 24, 2025, 0232 UTC
by Molvania Poacher
5 Replies
414 Views
Last post May 19, 2025, 2350 UTC
by Molvania Poacher
12 Replies
834 Views
Last post January 18, 2025, 0345 UTC
by Sealord
1 Replies
215 Views
Last post April 20, 2025, 1721 UTC
by N2MLP
8 Replies
762 Views
Last post February 20, 2025, 0203 UTC
by BallSmacker
16 Replies
1146 Views
Last post March 17, 2025, 0127 UTC
by LCDan
3 Replies
346 Views
Last post April 13, 2025, 2208 UTC
by N2MLP
6 Replies
826 Views
Last post March 12, 2025, 1234 UTC
by Sealord
5 Replies
481 Views
Last post February 11, 2025, 1926 UTC
by ChrisSmolinski
4 Replies
326 Views
Last post May 02, 2025, 0434 UTC
by Radiouser
4 Replies
530 Views
Last post November 30, 2024, 1534 UTC
by N2MLP
6 Replies
410 Views
Last post May 19, 2025, 2140 UTC
by Gloria Z
1 Replies
318 Views
Last post April 20, 2025, 1723 UTC
by N2MLP
4 Replies
567 Views
Last post December 14, 2024, 0722 UTC
by Robot Matrix
9 Replies
845 Views
Last post March 17, 2025, 0131 UTC
by Robot Matrix
2 Replies
354 Views
Last post May 12, 2025, 0141 UTC
by Professor
5 Replies
441 Views
Last post January 02, 2025, 1722 UTC
by dxace1

 

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