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
7 Replies
29664 Views
Last post November 17, 2022, 2247 UTC
by East Troy Don
68 Replies
23053 Views
Last post July 08, 2025, 2327 UTC
by kris
62 Replies
19728 Views
Last post July 08, 2025, 2248 UTC
by kris
3 Replies
264 Views
Last post July 08, 2025, 2228 UTC
by kris
0 Replies
62 Views
Last post July 04, 2025, 2222 UTC
by kris
15 Replies
6462 Views
Last post June 28, 2025, 2307 UTC
by kris
1 Replies
1514 Views
Last post June 23, 2025, 2233 UTC
by kris
13 Replies
6064 Views
Last post June 18, 2025, 1906 UTC
by orourkeda
0 Replies
323 Views
Last post June 16, 2025, 0527 UTC
by rosgraer
0 Replies
334 Views
Last post June 13, 2025, 1516 UTC
by Ethernut
126 Replies
54045 Views
Last post June 12, 2025, 1601 UTC
by orourkeda
5 Replies
1462 Views
Last post May 31, 2025, 2301 UTC
by kris
16 Replies
3057 Views
Last post May 31, 2025, 2257 UTC
by kris
11 Replies
2823 Views
Last post May 28, 2025, 2321 UTC
by kris
0 Replies
1077 Views
Last post May 18, 2025, 0943 UTC
by tiNG
60 Replies
36652 Views
Last post May 18, 2025, 0940 UTC
by tiNG
1 Replies
1501 Views
Last post May 17, 2025, 2317 UTC
by shadypyro
7 Replies
2035 Views
Last post April 30, 2025, 2356 UTC
by kris
49 Replies
26103 Views
Last post April 30, 2025, 2338 UTC
by kris
14 Replies
3970 Views
Last post April 29, 2025, 2309 UTC
by kris

 

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