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
63 Views
Last post Today at 18:41
by ZenithSWL
0 Replies
62 Views
Last post December 12, 2025, 1150 UTC
by Ray Lalleu
0 Replies
62 Views
Last post Today at 16:45
by Ray Lalleu
1 Replies
61 Views
Last post December 12, 2025, 1748 UTC
by Ray Lalleu
0 Replies
61 Views
Last post December 12, 2025, 1350 UTC
by Ray Lalleu
1 Replies
60 Views
Last post December 12, 2025, 1556 UTC
by Alex BLR
0 Replies
60 Views
Last post Today at 16:58
by Ray Lalleu
0 Replies
60 Views
Last post Today at 08:48
by Ray Lalleu
0 Replies
60 Views
Last post Today at 16:38
by Ray Lalleu
0 Replies
60 Views
Last post Today at 17:13
by Ray Lalleu
0 Replies
59 Views
Last post Today at 12:10
by TRI International
0 Replies
58 Views
Last post Today at 10:12
by Ray Lalleu
0 Replies
57 Views
Last post Today at 08:21
by Erdel59
1 Replies
57 Views
Last post Today at 00:45
by N2MLP
0 Replies
56 Views
Last post December 07, 2025, 1102 UTC
by Ray Lalleu
0 Replies
52 Views
Last post December 06, 2025, 1027 UTC
by Ray Lalleu
0 Replies
49 Views
Last post December 12, 2025, 1711 UTC
by Ray Lalleu
0 Replies
45 Views
Last post Today at 18:06
by Ray Lalleu
0 Replies
41 Views
Last post December 12, 2025, 1723 UTC
by Ray Lalleu
0 Replies
40 Views
Last post Today at 08:51
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