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
454 Views
Last post December 24, 2022, 1849 UTC
by Josh
0 Replies
1231 Views
Last post May 04, 2017, 0141 UTC
by Davep
0 Replies
385 Views
Last post October 27, 2023, 0812 UTC
by TRI International
0 Replies
1678 Views
Last post March 23, 2013, 1022 UTC
by glimmer twin
0 Replies
380 Views
Last post October 05, 2023, 1153 UTC
by TRI International
0 Replies
336 Views
Last post August 23, 2024, 0933 UTC
by TRI International
1 Replies
483 Views
Last post April 22, 2024, 2010 UTC
by Paul B. Walker, Jr.
0 Replies
379 Views
Last post September 07, 2024, 1738 UTC
by N2MLP
0 Replies
367 Views
Last post July 14, 2024, 1241 UTC
by N2MLP
0 Replies
420 Views
Last post September 07, 2024, 1741 UTC
by N2MLP
2 Replies
534 Views
Last post April 29, 2025, 1802 UTC
by Paul B. Walker, Jr.
0 Replies
378 Views
Last post September 23, 2024, 1800 UTC
by N2MLP
0 Replies
300 Views
Last post August 03, 2024, 1838 UTC
by N2MLP
0 Replies
319 Views
Last post August 25, 2024, 1227 UTC
by N2MLP
0 Replies
421 Views
Last post September 15, 2024, 1220 UTC
by N2MLP
0 Replies
1427 Views
Last post November 14, 2015, 1712 UTC
by Daniel Wyllyans
0 Replies
2010 Views
Last post February 12, 2016, 1154 UTC
by Daniel Wyllyans
0 Replies
1460 Views
Last post January 31, 2016, 0035 UTC
by Daniel Wyllyans
0 Replies
329 Views
Last post September 01, 2024, 0130 UTC
by N2MLP
2 Replies
559 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 T-Shirt
by MitchellTimeDesigns