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
6 Replies
1204 Views
Last post October 27, 2018, 2230 UTC
by 8 tattoos
1 Replies
438 Views
Last post September 10, 2024, 0054 UTC
by myteaquinn
3 Replies
900 Views
Last post December 02, 2017, 1247 UTC
by Ct Yankee
15 Replies
1704 Views
Last post November 22, 2022, 0419 UTC
by Zoidberg
5 Replies
1487 Views
Last post August 17, 2014, 1601 UTC
by ChrisSmolinski
1 Replies
601 Views
Last post June 10, 2021, 1217 UTC
by ChrisSmolinski
5 Replies
1647 Views
Last post September 07, 2015, 1537 UTC
by PghScanner
1 Replies
437 Views
Last post August 22, 2023, 0116 UTC
by Grumpy Grandpa
0 Replies
414 Views
Last post June 15, 2020, 2359 UTC
by Skipmuck
3 Replies
508 Views
Last post May 06, 2023, 2303 UTC
by Pigmeat
12 Replies
3115 Views
Last post June 13, 2015, 0107 UTC
by krissy
1 Replies
812 Views
Last post November 13, 2016, 0355 UTC
by aurora
2 Replies
534 Views
Last post June 19, 2022, 2258 UTC
by Ray Lalleu
7 Replies
1051 Views
Last post May 06, 2024, 0137 UTC
by myteaquinn
17 Replies
2719 Views
Last post July 05, 2019, 0511 UTC
by bandarr3000
0 Replies
548 Views
Last post April 20, 2020, 0015 UTC
by Skipmuck
0 Replies
449 Views
Last post October 16, 2021, 0953 UTC
by Skipmuck
4 Replies
1067 Views
Last post January 20, 2018, 0047 UTC
by Yankee Charlie
5 Replies
571 Views
Last post July 17, 2023, 0440 UTC
by shadypyro
1 Replies
202 Views
Last post March 15, 2025, 0042 UTC
by N2MLP

 

Normal Topic
Hot Topic (More than 15 replies)
Very Hot Topic (More than 25 replies)

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground Garden Flag
by MitchellTimeDesigns