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
873 Views
Last post December 24, 2022, 1849 UTC
by Josh
0 Replies
1353 Views
Last post May 04, 2017, 0141 UTC
by Davep
0 Replies
509 Views
Last post October 27, 2023, 0812 UTC
by TRI International
0 Replies
1798 Views
Last post March 23, 2013, 1022 UTC
by glimmer twin
0 Replies
491 Views
Last post October 05, 2023, 1153 UTC
by TRI International
0 Replies
445 Views
Last post August 23, 2024, 0933 UTC
by TRI International
1 Replies
629 Views
Last post April 22, 2024, 2010 UTC
by Paul B. Walker, Jr.
0 Replies
508 Views
Last post September 07, 2024, 1738 UTC
by N2MLP
0 Replies
525 Views
Last post July 14, 2024, 1241 UTC
by N2MLP
0 Replies
552 Views
Last post September 07, 2024, 1741 UTC
by N2MLP
2 Replies
1470 Views
Last post April 29, 2025, 1802 UTC
by Paul B. Walker, Jr.
0 Replies
506 Views
Last post September 23, 2024, 1800 UTC
by N2MLP
0 Replies
412 Views
Last post August 03, 2024, 1838 UTC
by N2MLP
0 Replies
436 Views
Last post August 25, 2024, 1227 UTC
by N2MLP
0 Replies
547 Views
Last post September 15, 2024, 1220 UTC
by N2MLP
0 Replies
1552 Views
Last post November 14, 2015, 1712 UTC
by Daniel Wyllyans
0 Replies
2139 Views
Last post February 12, 2016, 1154 UTC
by Daniel Wyllyans
0 Replies
1600 Views
Last post January 31, 2016, 0035 UTC
by Daniel Wyllyans
0 Replies
456 Views
Last post September 01, 2024, 0130 UTC
by N2MLP
2 Replies
707 Views
Last post September 02, 2024, 2204 UTC
by Paul B. Walker, Jr.

 

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