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
15 Replies
2228 Views
Last post December 17, 2023, 0222 UTC
by mweverson
1 Replies
458 Views
Last post September 23, 2023, 2350 UTC
by Paul B. Walker, Jr.
11 Replies
1464 Views
Last post October 29, 2023, 2104 UTC
by dfwhite
4 Replies
715 Views
Last post July 10, 2023, 0412 UTC
by TheHappyWanker
3 Replies
627 Views
Last post July 16, 2023, 0353 UTC
by Molvania Poacher
18 Replies
1678 Views
Last post November 16, 2024, 0147 UTC
by Traveling Wave
2 Replies
577 Views
Last post April 07, 2023, 0324 UTC
by Shortwave_Listener
0 Replies
504 Views
Last post May 12, 2024, 0615 UTC
by Shortwave_Listener
4 Replies
786 Views
Last post February 15, 2025, 1837 UTC
by N2MLP
5 Replies
713 Views
Last post March 02, 2024, 0251 UTC
by Sparkyzilla85
7 Replies
1061 Views
Last post February 15, 2023, 0416 UTC
by osiris
0 Replies
412 Views
Last post April 12, 2023, 0327 UTC
by Shortwave_Listener
14 Replies
1227 Views
Last post July 04, 2022, 0157 UTC
by rpjjpr
1 Replies
455 Views
Last post August 01, 2023, 0352 UTC
by shadypyro
11 Replies
1945 Views
Last post September 06, 2025, 1136 UTC
by ChrisSmolinski
6 Replies
671 Views
Last post November 25, 2024, 0210 UTC
by Molvania Poacher
2 Replies
632 Views
Last post February 07, 2024, 0547 UTC
by Carl
4 Replies
922 Views
Last post August 27, 2022, 0250 UTC
by Markokpik
25 Replies
2383 Views
Last post December 31, 2022, 1654 UTC
by Shortwave_Listener
4 Replies
859 Views
Last post November 28, 2024, 0455 UTC
by Quasar

 

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