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
5 Replies
580 Views
Last post July 06, 2025, 1949 UTC
by europirate
2 Replies
274 Views
Last post October 06, 2025, 0756 UTC
by Ray Lalleu
0 Replies
189 Views
Last post August 04, 2025, 0819 UTC
by dave1965
0 Replies
244 Views
Last post January 13, 2024, 1506 UTC
by Ray Lalleu
0 Replies
190 Views
Last post September 14, 2025, 1529 UTC
by Ray Lalleu
0 Replies
161 Views
Last post August 02, 2025, 1555 UTC
by Ray Lalleu
1 Replies
186 Views
Last post August 17, 2025, 1720 UTC
by Alex BLR
7 Replies
886 Views
Last post January 01, 2024, 0147 UTC
by Andrew Yoder
3 Replies
806 Views
Last post March 30, 2025, 1918 UTC
by kris
3 Replies
668 Views
Last post April 07, 2024, 1937 UTC
by Benoit LEVEQUE
1 Replies
193 Views
Last post October 09, 2025, 1909 UTC
by kris
4 Replies
532 Views
Last post September 11, 2025, 2123 UTC
by Lana
3 Replies
351 Views
Last post June 27, 2025, 2136 UTC
by europirate
3 Replies
307 Views
Last post July 31, 2025, 2107 UTC
by ralf_bender
2 Replies
319 Views
Last post July 04, 2025, 2207 UTC
by RadioLongWire
0 Replies
198 Views
Last post August 15, 2025, 1957 UTC
by Ray Lalleu
0 Replies
299 Views
Last post June 20, 2025, 2039 UTC
by Ray Lalleu
0 Replies
149 Views
Last post September 21, 2025, 2047 UTC
by Ray Lalleu
1 Replies
177 Views
Last post October 26, 2025, 2153 UTC
by Marcy1
2 Replies
570 Views
Last post December 10, 2023, 1711 UTC
by Magnitic

 

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