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
848 Views
Last post February 17, 2018, 1424 UTC
by Andrew Yoder
1 Replies
849 Views
Last post February 09, 2019, 2107 UTC
by Andrew Yoder
3 Replies
849 Views
Last post March 22, 2018, 2215 UTC
by ChrisSmolinski
2 Replies
849 Views
Last post November 17, 2018, 0249 UTC
by Markokpik
5 Replies
849 Views
Last post September 25, 2022, 1505 UTC
by Chuck54
1 Replies
849 Views
Last post October 11, 2017, 2313 UTC
by flexoman61
0 Replies
849 Views
Last post December 11, 2011, 1538 UTC
by ChrisSmolinski
0 Replies
849 Views
Last post April 09, 2012, 1221 UTC
by Sealord
2 Replies
849 Views
Last post September 04, 2019, 1959 UTC
by aurora
6 Replies
849 Views
Last post October 31, 2022, 0025 UTC
by vamtnlion
12 Replies
849 Views
Last post December 30, 2024, 1639 UTC
by Ron Hunsicker
8 Replies
849 Views
Last post February 07, 2025, 2323 UTC
by N2MLP
1 Replies
849 Views
Last post February 10, 2013, 1826 UTC
by Sealord
3 Replies
849 Views
Last post November 01, 2023, 1933 UTC
by ~SIGINT~
2 Replies
849 Views
Last post November 17, 2021, 0105 UTC
by kandi
0 Replies
849 Views
Last post May 31, 2013, 1242 UTC
by ChrisSmolinski
6 Replies
849 Views
Last post August 22, 2025, 0323 UTC
by Liquid Radio
5 Replies
849 Views
Last post April 08, 2024, 0114 UTC
by DangerKitty
0 Replies
849 Views
Last post December 18, 2015, 2040 UTC
by KB4YHO
12 Replies
850 Views
Last post February 08, 2025, 2315 UTC
by Sarge94

 

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