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
1 Replies
425 Views
Last post June 02, 2024, 1951 UTC
by Ray Lalleu
2 Replies
1073 Views
Last post August 04, 2020, 2146 UTC
by cj468
0 Replies
542 Views
Last post January 22, 2023, 1105 UTC
by TRI International
1 Replies
514 Views
Last post June 09, 2024, 1257 UTC
by TRI International
1 Replies
449 Views
Last post February 25, 2024, 0848 UTC
by Ray Lalleu
2 Replies
545 Views
Last post December 03, 2023, 1007 UTC
by Ray Lalleu
1 Replies
249 Views
Last post June 23, 2025, 0000 UTC
by Ray Lalleu
2 Replies
57 Views
Last post September 06, 2025, 0910 UTC
by Ray Lalleu
0 Replies
1089 Views
Last post April 09, 2018, 1726 UTC
by kris
1 Replies
306 Views
Last post December 15, 2024, 0848 UTC
by Ray Lalleu
2 Replies
590 Views
Last post December 14, 2023, 1629 UTC
by Ray Lalleu
2 Replies
475 Views
Last post October 25, 2024, 1302 UTC
by Ray Lalleu
1 Replies
384 Views
Last post December 31, 2023, 1743 UTC
by Ray Lalleu
1 Replies
537 Views
Last post February 04, 2024, 1102 UTC
by Ray Lalleu
2 Replies
891 Views
Last post April 13, 2020, 2104 UTC
by kris
2 Replies
531 Views
Last post February 16, 2024, 1954 UTC
by Ray Lalleu
1 Replies
629 Views
Last post April 18, 2025, 2254 UTC
by Ray Lalleu
1 Replies
581 Views
Last post June 01, 2023, 1724 UTC
by ChrisSmolinski
27 Replies
5270 Views
Last post August 16, 2019, 1805 UTC
by Jock Wilson
0 Replies
419 Views
Last post January 19, 2024, 1657 UTC
by Ray Lalleu

 

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