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
3 Replies
587 Views
Last post October 12, 2023, 2246 UTC
by N2MLP
1 Replies
587 Views
Last post July 10, 2018, 2201 UTC
by Davep
4 Replies
587 Views
Last post December 02, 2024, 2027 UTC
by osiris
1 Replies
587 Views
Last post March 12, 2021, 2215 UTC
by Big Badfish Al
1 Replies
587 Views
Last post May 25, 2019, 2017 UTC
by Dr. Strangelove
0 Replies
587 Views
Last post November 07, 2015, 1621 UTC
by ChrisSmolinski
7 Replies
587 Views
Last post February 13, 2025, 2308 UTC
by dxace1
0 Replies
587 Views
Last post May 16, 2020, 0128 UTC
by PirateSWL
1 Replies
587 Views
Last post May 05, 2018, 2002 UTC
by Davep
8 Replies
587 Views
Last post January 25, 2025, 2012 UTC
by ChrisSmolinski
1 Replies
587 Views
Last post November 05, 2021, 0220 UTC
by ChrisLobdell
1 Replies
587 Views
Last post November 13, 2020, 1257 UTC
by Rob.
1 Replies
588 Views
Last post May 24, 2020, 1509 UTC
by hammarhead
6 Replies
588 Views
Last post October 29, 2024, 2219 UTC
by Treehouse SWL
0 Replies
588 Views
Last post July 16, 2017, 2106 UTC
by ChrisSmolinski
6 Replies
588 Views
Last post August 18, 2023, 0304 UTC
by Grumpy Grandpa
9 Replies
588 Views
Last post January 25, 2025, 0032 UTC
by William Hassig
1 Replies
588 Views
Last post August 03, 2018, 1151 UTC
by ChrisSmolinski
1 Replies
588 Views
Last post August 14, 2019, 2122 UTC
by Skipmuck
3 Replies
588 Views
Last post December 10, 2023, 1941 UTC
by Skipmuck

 

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