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
597 Views
Last post March 09, 2017, 2315 UTC
by ChrisSmolinski
0 Replies
709 Views
Last post October 29, 2017, 1508 UTC
by ChrisSmolinski
2 Replies
409 Views
Last post July 10, 2025, 1928 UTC
by Andrew Yoder
4 Replies
1168 Views
Last post May 21, 2016, 0106 UTC
by William Hassig
1 Replies
1016 Views
Last post December 03, 2014, 1506 UTC
by jFarley
13 Replies
1600 Views
Last post April 30, 2022, 2319 UTC
by aurora
0 Replies
868 Views
Last post September 06, 2013, 1143 UTC
by ChrisSmolinski
0 Replies
946 Views
Last post October 24, 2014, 2305 UTC
by ChrisSmolinski
8 Replies
1216 Views
Last post November 16, 2024, 2331 UTC
by ZFT
1 Replies
686 Views
Last post January 19, 2018, 2059 UTC
by JCMaxwell
6 Replies
2111 Views
Last post December 16, 2015, 0250 UTC
by JoeFLIPS
11 Replies
5600 Views
Last post March 29, 2014, 0124 UTC
by philcobill
0 Replies
481 Views
Last post June 23, 2024, 1351 UTC
by ChrisSmolinski
8 Replies
1171 Views
Last post December 08, 2019, 2240 UTC
by Beerus Maximus
0 Replies
965 Views
Last post March 07, 2015, 1520 UTC
by ChrisSmolinski
23 Replies
2243 Views
Last post October 26, 2024, 0022 UTC
by elburndx
3 Replies
1394 Views
Last post August 02, 2015, 2130 UTC
by flexoman61
6 Replies
959 Views
Last post December 23, 2020, 2226 UTC
by MDK2
1 Replies
961 Views
Last post August 24, 2014, 0008 UTC
by jFarley
2 Replies
808 Views
Last post December 04, 2017, 0012 UTC
by Davep

 

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