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
27 Replies
836 Views
Last post September 21, 2025, 0329 UTC
by DreamWeeVA
7 Replies
333 Views
Last post September 21, 2025, 0155 UTC
by Professor
12 Replies
408 Views
Last post September 21, 2025, 0035 UTC
by N2MLP
19 Replies
614 Views
Last post September 21, 2025, 0030 UTC
by TheHappyWanker
13 Replies
373 Views
Last post September 21, 2025, 0012 UTC
by Zane
2 Replies
156 Views
Last post September 20, 2025, 2246 UTC
by Radiouser
18 Replies
646 Views
Last post September 20, 2025, 2106 UTC
by Ron Hunsicker
11 Replies
462 Views
Last post September 20, 2025, 1851 UTC
by TRI International
6 Replies
315 Views
Last post September 20, 2025, 1716 UTC
by ChrisSmolinski
8 Replies
315 Views
Last post September 20, 2025, 1657 UTC
by Mick Boyle
10 Replies
330 Views
Last post September 20, 2025, 1646 UTC
by ChrisSmolinski
4 Replies
189 Views
Last post September 20, 2025, 1522 UTC
by N2MLP
16 Replies
627 Views
Last post September 20, 2025, 0439 UTC
by Jim Renfrew
5 Replies
282 Views
Last post September 20, 2025, 0230 UTC
by Markokpik
22 Replies
652 Views
Last post September 20, 2025, 0221 UTC
by RadioHF - Sheldon Harvey
13 Replies
686 Views
Last post September 20, 2025, 0133 UTC
by Molvania Poacher
15 Replies
470 Views
Last post September 20, 2025, 0102 UTC
by William Hassig
20 Replies
689 Views
Last post September 20, 2025, 0043 UTC
by Sarge94
17 Replies
634 Views
Last post September 20, 2025, 0026 UTC
by mdynac
13 Replies
425 Views
Last post September 19, 2025, 2309 UTC
by JustGreg

 

Normal Topic
Hot Topic (More than 15 replies)
Very Hot Topic (More than 25 replies)

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground House Flag
by MitchellTimeDesigns