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
4 Replies
1653 Views
Last post October 29, 2017, 0154 UTC
by myteaquinn
9 Replies
1306 Views
Last post June 15, 2019, 0155 UTC
by JohnS
1 Replies
385 Views
Last post February 21, 2025, 0115 UTC
by Quasar
4 Replies
1857 Views
Last post July 05, 2014, 2119 UTC
by jFarley
1 Replies
1212 Views
Last post December 15, 2015, 1325 UTC
by ChrisSmolinski
0 Replies
278 Views
Last post May 08, 2023, 1415 UTC
by ChrisSmolinski
0 Replies
477 Views
Last post June 03, 2019, 0951 UTC
by ChrisSmolinski
0 Replies
954 Views
Last post May 18, 2013, 0125 UTC
by hsmith77
0 Replies
711 Views
Last post June 12, 2013, 1913 UTC
by ChrisSmolinski
1 Replies
927 Views
Last post June 26, 2019, 1559 UTC
by ChrisSmolinski
1 Replies
753 Views
Last post January 31, 2022, 0152 UTC
by bandarr3000
0 Replies
353 Views
Last post June 28, 2022, 0129 UTC
by hsmith77
2 Replies
1129 Views
Last post April 13, 2014, 0130 UTC
by Skipmuck
4 Replies
534 Views
Last post July 16, 2024, 0904 UTC
by N2MLP
0 Replies
989 Views
Last post December 04, 2022, 0131 UTC
by UtilitySeattle
1 Replies
826 Views
Last post February 03, 2019, 0125 UTC
by Treehouse SWL
1 Replies
1193 Views
Last post April 24, 2017, 0122 UTC
by flexoman61
0 Replies
359 Views
Last post May 13, 2023, 0127 UTC
by Chuck54
1 Replies
416 Views
Last post January 22, 2023, 1115 UTC
by Ray Lalleu
1 Replies
867 Views
Last post August 26, 2012, 1518 UTC
by jFarley

 

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