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
291 Views
Last post November 21, 2023, 1016 UTC
by TRI International
0 Replies
315 Views
Last post January 27, 2023, 1905 UTC
by TRI International
0 Replies
457 Views
Last post May 19, 2024, 1039 UTC
by TRI International
1 Replies
400 Views
Last post June 17, 2024, 0832 UTC
by Misti-Radio
0 Replies
282 Views
Last post December 25, 2023, 2221 UTC
by TRI International
0 Replies
552 Views
Last post May 05, 2025, 1050 UTC
by TRI International
0 Replies
664 Views
Last post August 02, 2023, 0910 UTC
by TRI International
0 Replies
490 Views
Last post December 25, 2023, 2334 UTC
by TRI International
0 Replies
226 Views
Last post November 23, 2024, 1020 UTC
by TRI International
0 Replies
317 Views
Last post January 01, 2024, 1342 UTC
by TRI International
1 Replies
332 Views
Last post December 26, 2024, 1919 UTC
by Ronald_Mullis
0 Replies
307 Views
Last post October 21, 2024, 0818 UTC
by TRI International
1 Replies
403 Views
Last post May 22, 2024, 1704 UTC
by prldx
0 Replies
477 Views
Last post August 04, 2023, 0933 UTC
by TRI International
0 Replies
369 Views
Last post December 26, 2023, 1125 UTC
by TRI International
0 Replies
411 Views
Last post January 01, 2024, 1406 UTC
by TRI International
0 Replies
276 Views
Last post May 05, 2024, 0950 UTC
by TRI International
0 Replies
303 Views
Last post October 21, 2024, 0822 UTC
by TRI International
0 Replies
405 Views
Last post August 06, 2023, 0916 UTC
by TRI International
2 Replies
570 Views
Last post December 18, 2023, 1000 UTC
by TRI International

 

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