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
9 Replies
1490 Views
Last post May 31, 2021, 0240 UTC
by Billo
5 Replies
1490 Views
Last post February 09, 2015, 2323 UTC
by refmo
12 Replies
1490 Views
Last post October 15, 2022, 2025 UTC
by Pigmeat
1 Replies
1490 Views
Last post August 08, 2016, 1929 UTC
by refmo
4 Replies
1490 Views
Last post August 29, 2011, 0014 UTC
by corq
10 Replies
1490 Views
Last post March 06, 2021, 0220 UTC
by myteaquinn
5 Replies
1490 Views
Last post November 26, 2016, 2305 UTC
by Shawndx
1 Replies
1490 Views
Last post December 05, 2009, 1644 UTC
by Zane
12 Replies
1491 Views
Last post March 29, 2022, 2158 UTC
by hsmith77
9 Replies
1491 Views
Last post May 08, 2024, 1102 UTC
by ChrisSmolinski
3 Replies
1491 Views
Last post September 15, 2013, 0253 UTC
by jFarley
13 Replies
1491 Views
Last post July 31, 2022, 0251 UTC
by Bali_Frank
10 Replies
1491 Views
Last post June 07, 2025, 1457 UTC
by ChrisSmolinski
4 Replies
1491 Views
Last post July 14, 2012, 0334 UTC
by lightkeeper
4 Replies
1491 Views
Last post October 10, 2015, 0147 UTC
by refmo
5 Replies
1491 Views
Last post June 24, 2019, 0250 UTC
by Ray Lalleu
3 Replies
1491 Views
Last post April 21, 2017, 1129 UTC
by ChrisSmolinski
3 Replies
1491 Views
Last post March 14, 2017, 2315 UTC
by R4002
9 Replies
1491 Views
Last post May 25, 2020, 0034 UTC
by Skipmuck
5 Replies
1491 Views
Last post October 30, 2019, 1156 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