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
0 Replies
273 Views
Last post February 20, 2024, 1231 UTC
by ChrisSmolinski
5 Replies
976 Views
Last post March 06, 2022, 2247 UTC
by Sky Waves
4 Replies
434 Views
Last post February 08, 2025, 2143 UTC
by N2MLP
0 Replies
296 Views
Last post December 11, 2022, 1141 UTC
by ChrisSmolinski
0 Replies
804 Views
Last post January 07, 2018, 1718 UTC
by ChrisSmolinski
8 Replies
1782 Views
Last post December 11, 2015, 2304 UTC
by oly1959
0 Replies
763 Views
Last post March 07, 2013, 1332 UTC
by ChrisSmolinski
8 Replies
1477 Views
Last post August 24, 2016, 1211 UTC
by jFarley
2 Replies
666 Views
Last post December 01, 2019, 2256 UTC
by Ray Lalleu
11 Replies
2522 Views
Last post February 28, 2015, 0130 UTC
by SDL
10 Replies
1511 Views
Last post March 05, 2023, 2144 UTC
by shadypyro
1 Replies
859 Views
Last post July 19, 2013, 2040 UTC
by jFarley
0 Replies
573 Views
Last post February 22, 2019, 1047 UTC
by ChrisSmolinski
8 Replies
2192 Views
Last post March 19, 2014, 0017 UTC
by caodwolf
0 Replies
242 Views
Last post May 04, 2025, 1132 UTC
by ChrisSmolinski
9 Replies
2204 Views
Last post November 28, 2017, 0115 UTC
by aquabat
5 Replies
1487 Views
Last post January 28, 2013, 1831 UTC
by Hornet0123
0 Replies
897 Views
Last post July 03, 2016, 1554 UTC
by ChrisSmolinski
8 Replies
2221 Views
Last post October 27, 2013, 0006 UTC
by aurora
12 Replies
1936 Views
Last post October 12, 2019, 2127 UTC
by PirateSWL

 

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