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
15 Replies
2025 Views
Last post September 14, 2024, 1528 UTC
by N2MLP
18 Replies
2025 Views
Last post January 21, 2023, 0353 UTC
by bcoggs
5 Replies
2025 Views
Last post December 20, 2014, 1550 UTC
by ChrisSmolinski
1 Replies
2025 Views
Last post December 23, 2013, 0301 UTC
by Rockpicker
UNID 6949.9 AM 1525 UTC 2/12/16

Started by JoeFLIPS

5 Replies
2024 Views
Last post February 12, 2016, 2152 UTC
by Skipmuck
7 Replies
2024 Views
Last post February 21, 2016, 1408 UTC
by Andrew Yoder
11 Replies
2024 Views
Last post May 05, 2025, 2206 UTC
by Andrew Yoder
9 Replies
2024 Views
Last post March 31, 2017, 2340 UTC
by Markokpik
10 Replies
2024 Views
Last post October 09, 2019, 2320 UTC
by Treehouse SWL
4 Replies
2024 Views
Last post March 17, 2012, 0028 UTC
by Bowman1
14 Replies
2024 Views
Last post March 10, 2023, 2332 UTC
by Sarge94
2 Replies
2024 Views
Last post January 15, 2017, 1614 UTC
by ChrisSmolinski
0 Replies
2023 Views
Last post November 02, 2008, 0730 UTC
by Zoidberg
8 Replies
2023 Views
Last post September 04, 2017, 0555 UTC
by RainBrandy
20 Replies
2023 Views
Last post September 24, 2022, 0158 UTC
by Traveling Wave
7 Replies
2023 Views
Last post February 03, 2014, 0332 UTC
by refmo
7 Replies
2023 Views
Last post February 19, 2017, 1526 UTC
by ChrisSmolinski
4 Replies
2023 Views
Last post May 16, 2015, 1312 UTC
by ChrisSmolinski
8 Replies
2023 Views
Last post December 17, 2016, 2149 UTC
by curious george
5 Replies
2023 Views
Last post June 10, 2013, 0215 UTC
by Lord Windemere

 

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