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
0 Replies
484 Views
Last post July 10, 2024, 1417 UTC
by ChrisSmolinski
2 Replies
1183 Views
Last post July 07, 2024, 1232 UTC
by ChrisSmolinski
3 Replies
1233 Views
Last post July 09, 2024, 2200 UTC
by ChrisSmolinski
9 Replies
825 Views
Last post July 27, 2024, 0020 UTC
by Markokpik
12 Replies
800 Views
Last post November 01, 2025, 1524 UTC
by N2MLP
2 Replies
517 Views
Last post June 14, 2024, 2205 UTC
by ChrisSmolinski
9 Replies
1713 Views
Last post July 06, 2024, 0055 UTC
by Big Badfish Al
7 Replies
1921 Views
Last post August 18, 2024, 1154 UTC
by TheHappyWanker
12 Replies
1000 Views
Last post August 17, 2025, 1538 UTC
by myteaquinn
0 Replies
548 Views
Last post June 23, 2024, 1351 UTC
by ChrisSmolinski
7 Replies
1281 Views
Last post June 15, 2024, 0007 UTC
by ChrisLobdell
15 Replies
3816 Views
Last post February 28, 2014, 1255 UTC
by ChrisSmolinski
9 Replies
2783 Views
Last post September 08, 2013, 1540 UTC
by Jolly Roger
2 Replies
1871 Views
Last post May 30, 2009, 0449 UTC
by rattusrattus
16 Replies
1988 Views
Last post March 18, 2023, 0311 UTC
by myteaquinn
9 Replies
1142 Views
Last post April 03, 2023, 0139 UTC
by Markokpik
5 Replies
677 Views
Last post April 06, 2024, 2352 UTC
by myteaquinn
1 Replies
619 Views
Last post July 15, 2024, 2215 UTC
by N2MLP
10 Replies
1772 Views
Last post April 28, 2018, 0048 UTC
by Dr. Strangelove
8 Replies
1094 Views
Last post November 26, 2023, 1536 UTC
by ChrisLobdell

 

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