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
1264 Views
Last post June 20, 2017, 1443 UTC
by ChrisSmolinski
0 Replies
795 Views
Last post May 16, 2022, 0310 UTC
by Shortwave_Listener
5 Replies
5514 Views
Last post September 13, 2016, 2011 UTC
by EliteData
1 Replies
6082 Views
Last post July 09, 2017, 1428 UTC
by thechoat
4 Replies
2653 Views
Last post May 14, 2019, 2230 UTC
by shadypyro
4 Replies
4326 Views
Last post October 15, 2018, 1540 UTC
by R4002
0 Replies
568 Views
Last post October 25, 2025, 2017 UTC
by tennessee
1 Replies
2815 Views
Last post March 11, 2025, 1428 UTC
by RadioMon
3 Replies
9727 Views
Last post December 24, 2016, 1656 UTC
by R4002
4 Replies
2208 Views
Last post August 18, 2023, 1409 UTC
by SkyWalker
6 Replies
2475 Views
Last post February 18, 2025, 1553 UTC
by Quasar
0 Replies
2237 Views
Last post April 17, 2014, 1815 UTC
by CoolAM Radio
0 Replies
1497 Views
Last post October 23, 2017, 2007 UTC
by skeezix
5 Replies
1813 Views
Last post October 17, 2021, 1907 UTC
by Elf36
7 Replies
3333 Views
Last post May 06, 2018, 0130 UTC
by FFM
0 Replies
2411 Views
Last post April 26, 2016, 1928 UTC
by SkyWalker
Chanel 6 am

Started by Laidbackdx

2 Replies
3549 Views
Last post March 19, 2017, 0514 UTC
by R4002
1 Replies
1032 Views
Last post August 31, 2024, 1635 UTC
by N2MLP
2 Replies
1294 Views
Last post October 15, 2021, 1812 UTC
by R4002
Christmas 10M conditions

Started by Elf36

4 Replies
1105 Views
Last post December 26, 2021, 1236 UTC
by Elf36

 

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