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
563 Views
Last post December 20, 2022, 0006 UTC
by KMD3HR
15 Replies
1278 Views
Last post March 07, 2025, 0057 UTC
by myteaquinn
5 Replies
658 Views
Last post April 14, 2025, 1151 UTC
by Radio Star
19 Replies
1906 Views
Last post April 07, 2023, 2341 UTC
by ChrisLobdell
3 Replies
459 Views
Last post November 12, 2022, 0249 UTC
by blw
3 Replies
552 Views
Last post February 20, 2025, 2113 UTC
by ChrisSmolinski
1 Replies
523 Views
Last post June 07, 2022, 0501 UTC
by TheHappyWanker
1 Replies
489 Views
Last post February 02, 2023, 0239 UTC
by Shortwave_Listener
6 Replies
1100 Views
Last post April 25, 2025, 1220 UTC
by ChrisSmolinski
8 Replies
1470 Views
Last post April 26, 2025, 0209 UTC
by Charlie_Dont_Surf
12 Replies
1391 Views
Last post December 23, 2022, 0227 UTC
by Pigmeat
7 Replies
682 Views
Last post November 16, 2024, 0302 UTC
by myteaquinn
10 Replies
1236 Views
Last post September 24, 2023, 0034 UTC
by shadypyro
19 Replies
1871 Views
Last post March 24, 2024, 0333 UTC
by Charlie_Dont_Surf
5 Replies
994 Views
Last post December 09, 2022, 0142 UTC
by Rizla
2 Replies
525 Views
Last post June 06, 2022, 0202 UTC
by Skipmuck
9 Replies
1000 Views
Last post March 24, 2024, 1438 UTC
by Sealord
8 Replies
691 Views
Last post October 30, 2024, 0140 UTC
by Radiouser
8 Replies
816 Views
Last post May 13, 2023, 0220 UTC
by Skipmuck
11 Replies
1084 Views
Last post May 13, 2023, 0156 UTC
by blw

 

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