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
4 Replies
588 Views
Last post February 15, 2025, 1843 UTC
by N2MLP
4 Replies
649 Views
Last post February 15, 2025, 1837 UTC
by N2MLP
4 Replies
486 Views
Last post February 15, 2025, 1836 UTC
by N2MLP
8 Replies
680 Views
Last post February 15, 2025, 1835 UTC
by N2MLP
1 Replies
327 Views
Last post February 15, 2025, 1412 UTC
by Ron Hunsicker
0 Replies
325 Views
Last post February 15, 2025, 0109 UTC
by DangerKitty
1 Replies
368 Views
Last post February 14, 2025, 2349 UTC
by Radiouser
7 Replies
1849 Views
Last post February 14, 2025, 2123 UTC
by Chuck54
8 Replies
959 Views
Last post February 14, 2025, 1721 UTC
by ChrisSmolinski
11 Replies
1793 Views
Last post February 14, 2025, 1157 UTC
by RainBrandy
0 Replies
597 Views
Last post February 14, 2025, 0749 UTC
by Shortwave_Listener
3 Replies
1023 Views
Last post February 14, 2025, 0159 UTC
by K1MLP
7 Replies
708 Views
Last post February 14, 2025, 0027 UTC
by JustGreg
2 Replies
660 Views
Last post February 14, 2025, 0003 UTC
by hammarhead
13 Replies
1088 Views
Last post February 13, 2025, 2342 UTC
by V-SKY
7 Replies
686 Views
Last post February 13, 2025, 2308 UTC
by dxace1
9 Replies
852 Views
Last post February 13, 2025, 2203 UTC
by Chuck54
0 Replies
394 Views
Last post February 13, 2025, 1256 UTC
by ChrisSmolinski
0 Replies
318 Views
Last post February 13, 2025, 1238 UTC
by ChrisSmolinski
0 Replies
559 Views
Last post February 13, 2025, 0421 UTC
by Professor

 

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

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground Garden Flag
by MitchellTimeDesigns