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
7 Replies
612 Views
Last post July 31, 2025, 2323 UTC
by William Hassig
7 Replies
612 Views
Last post September 19, 2025, 2157 UTC
by ChrisSmolinski
0 Replies
612 Views
Last post March 27, 2021, 1847 UTC
by Big Badfish Al
1 Replies
612 Views
Last post October 03, 2024, 1434 UTC
by ChrisSmolinski
0 Replies
612 Views
Last post September 24, 2020, 0215 UTC
by blw
0 Replies
613 Views
Last post October 08, 2017, 1547 UTC
by ChrisSmolinski
0 Replies
613 Views
Last post May 16, 2024, 2357 UTC
by blw
4 Replies
613 Views
Last post November 18, 2022, 1255 UTC
by ChrisSmolinski
3 Replies
613 Views
Last post July 04, 2025, 0203 UTC
by TheHappyWanker
1 Replies
613 Views
Last post September 05, 2024, 0100 UTC
by Skipmuck
1 Replies
613 Views
Last post September 09, 2024, 1123 UTC
by ChrisSmolinski
0 Replies
613 Views
Last post October 10, 2017, 1601 UTC
by ChrisSmolinski
0 Replies
613 Views
Last post June 02, 2025, 0329 UTC
by DangerKitty
0 Replies
613 Views
Last post September 05, 2019, 1332 UTC
by ChrisSmolinski
2 Replies
613 Views
Last post May 14, 2023, 0410 UTC
by Treehouse SWL
11 Replies
613 Views
Last post November 25, 2025, 0035 UTC
by myteaquinn
1 Replies
613 Views
Last post December 25, 2017, 1929 UTC
by PirateSWL
0 Replies
613 Views
Last post December 24, 2019, 1404 UTC
by ChrisSmolinski
1 Replies
613 Views
Last post October 29, 2024, 1230 UTC
by TRI International
2 Replies
613 Views
Last post June 19, 2024, 1611 UTC
by ChrisSmolinski

 

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