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
9 Replies
1352 Views
Last post October 30, 2023, 1725 UTC
by hammarhead
5 Replies
1613 Views
Last post July 04, 2019, 0220 UTC
by digitalmod
5 Replies
355 Views
Last post August 03, 2025, 0446 UTC
by Professor
19 Replies
1928 Views
Last post April 08, 2025, 0101 UTC
by Quasar
15 Replies
1381 Views
Last post August 19, 2023, 0202 UTC
by Zoidberg
2 Replies
540 Views
Last post June 15, 2024, 1414 UTC
by N2MLP
7 Replies
1251 Views
Last post September 21, 2023, 2052 UTC
by Dr. Strangelove
3 Replies
637 Views
Last post January 07, 2024, 0115 UTC
by Dr. Strangelove
4 Replies
805 Views
Last post September 04, 2024, 0233 UTC
by Skipmuck
7 Replies
1294 Views
Last post February 29, 2020, 1936 UTC
by dave524
0 Replies
359 Views
Last post November 13, 2023, 0020 UTC
by myteaquinn
13 Replies
2326 Views
Last post January 01, 2020, 0215 UTC
by super skyrider
6 Replies
953 Views
Last post May 25, 2025, 0501 UTC
by Molvania Poacher
5 Replies
2684 Views
Last post November 01, 2011, 1346 UTC
by ChrisSmolinski
0 Replies
374 Views
Last post October 06, 2024, 1900 UTC
by myteaquinn
6 Replies
436 Views
Last post July 21, 2025, 0234 UTC
by Syck0
5 Replies
1262 Views
Last post April 16, 2021, 1403 UTC
by ChrisSmolinski
0 Replies
389 Views
Last post January 28, 2023, 0408 UTC
by myteaquinn
0 Replies
329 Views
Last post December 09, 2023, 0111 UTC
by myteaquinn
13 Replies
1819 Views
Last post November 11, 2023, 0049 UTC
by BigAl

 

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