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
12 Replies
1316 Views
Last post December 09, 2023, 0101 UTC
by Sky Waves
11 Replies
1099 Views
Last post December 10, 2023, 2259 UTC
by Dr. Strangelove
17 Replies
1654 Views
Last post January 11, 2025, 0253 UTC
by N2MLP
10 Replies
831 Views
Last post February 11, 2025, 0028 UTC
by hflstnr
4 Replies
918 Views
Last post September 20, 2022, 1358 UTC
by Sealord
20 Replies
1777 Views
Last post September 24, 2022, 0158 UTC
by Traveling Wave
9 Replies
972 Views
Last post October 12, 2022, 2357 UTC
by myteaquinn
7 Replies
1289 Views
Last post September 26, 2022, 0013 UTC
by K1MLP
18 Replies
1372 Views
Last post November 09, 2024, 0128 UTC
by Markokpik
9 Replies
1028 Views
Last post November 11, 2024, 0019 UTC
by hflstnr
13 Replies
1218 Views
Last post May 05, 2023, 0204 UTC
by Jon Shoe - N8UL
23 Replies
1841 Views
Last post October 27, 2024, 0048 UTC
by N2MLP
11 Replies
888 Views
Last post July 27, 2024, 0102 UTC
by blw
13 Replies
1123 Views
Last post October 28, 2024, 2349 UTC
by dxwingr
12 Replies
9497 Views
Last post September 07, 2023, 0121 UTC
by ChrisLobdell
15 Replies
1294 Views
Last post September 03, 2023, 1458 UTC
by ChrisSmolinski
10 Replies
1011 Views
Last post August 25, 2023, 0143 UTC
by Markokpik
16 Replies
1853 Views
Last post December 23, 2023, 1347 UTC
by Sealord
10 Replies
1173 Views
Last post March 18, 2025, 0038 UTC
by Markokpik
28 Replies
2629 Views
Last post November 14, 2022, 0100 UTC
by vlf2hf

 

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