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
3175 Views
Last post February 03, 2025, 0549 UTC
by Robot Matrix
0 Replies
2335 Views
Last post January 25, 2025, 0440 UTC
by Robot Matrix
1 Replies
2206 Views
Last post January 02, 2025, 1500 UTC
by pinto vortando
0 Replies
967 Views
Last post August 01, 2021, 0800 UTC
by Robot Matrix
0 Replies
1658 Views
Last post December 28, 2024, 0716 UTC
by Robot Matrix
0 Replies
1650 Views
Last post December 28, 2024, 0704 UTC
by Robot Matrix
0 Replies
1042 Views
Last post September 07, 2020, 0209 UTC
by RobRich
1 Replies
1579 Views
Last post April 02, 2024, 1935 UTC
by Ct Yankee
4 Replies
3810 Views
Last post January 19, 2013, 2048 UTC
by BDM
5 Replies
4292 Views
Last post November 23, 2013, 0426 UTC
by redhat
1 Replies
2660 Views
Last post October 25, 2014, 1203 UTC
by Kilokat7
1 Replies
2538 Views
Last post May 08, 2013, 0047 UTC
by Chanter
2 Replies
6406 Views
Last post October 05, 2014, 0138 UTC
by Rockpicker
0 Replies
2338 Views
Last post April 15, 2014, 0602 UTC
by Rockpicker
1 Replies
1232 Views
Last post July 23, 2021, 0720 UTC
by Matt_B
0 Replies
1209 Views
Last post April 12, 2017, 0425 UTC
by RST111
0 Replies
1466 Views
Last post October 28, 2024, 0039 UTC
by Sarge94
0 Replies
1210 Views
Last post October 28, 2024, 0023 UTC
by Sarge94
0 Replies
2568 Views
Last post June 25, 2025, 0352 UTC
by Sarge94
0 Replies
2305 Views
Last post April 25, 2025, 0241 UTC
by Sarge94

 

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