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
820 Views
Last post October 24, 2020, 2202 UTC
by ChrisSmolinski
2 Replies
757 Views
Last post August 31, 2023, 1546 UTC
by ChrisSmolinski
1 Replies
1548 Views
Last post December 09, 2020, 0116 UTC
by Kilokat7
0 Replies
602 Views
Last post December 09, 2023, 1656 UTC
by ChrisSmolinski
0 Replies
976 Views
Last post April 17, 2021, 1525 UTC
by ChrisSmolinski
0 Replies
594 Views
Last post February 20, 2024, 1258 UTC
by ChrisSmolinski
0 Replies
1008 Views
Last post December 01, 2021, 2247 UTC
by ChrisSmolinski
0 Replies
656 Views
Last post May 27, 2024, 2055 UTC
by ChrisSmolinski
0 Replies
1492 Views
Last post February 19, 2022, 2324 UTC
by ChrisSmolinski
0 Replies
667 Views
Last post October 18, 2024, 1413 UTC
by ChrisSmolinski
0 Replies
632 Views
Last post December 15, 2024, 1333 UTC
by ChrisSmolinski
1 Replies
905 Views
Last post April 18, 2023, 0918 UTC
by TRI International
0 Replies
363 Views
Last post May 30, 2025, 1305 UTC
by ChrisSmolinski
0 Replies
1005 Views
Last post October 25, 2020, 0109 UTC
by ChrisSmolinski
1 Replies
1284 Views
Last post December 09, 2020, 1251 UTC
by ChrisSmolinski
2 Replies
2609 Views
Last post November 20, 2016, 2326 UTC
by Skipmuck
0 Replies
913 Views
Last post February 21, 2021, 1354 UTC
by ChrisSmolinski
0 Replies
664 Views
Last post December 11, 2023, 1242 UTC
by ChrisSmolinski
0 Replies
620 Views
Last post February 20, 2024, 1259 UTC
by ChrisSmolinski
0 Replies
1098 Views
Last post December 01, 2021, 2251 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