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
160 Views
Last post November 01, 2025, 0848 UTC
by Ray Lalleu
1 Replies
186 Views
Last post October 31, 2025, 2024 UTC
by Alex BLR
0 Replies
169 Views
Last post October 31, 2025, 1921 UTC
by Alex BLR
3 Replies
239 Views
Last post October 31, 2025, 1837 UTC
by studio29
1 Replies
224 Views
Last post October 31, 2025, 1822 UTC
by Ray Lalleu
0 Replies
122 Views
Last post October 31, 2025, 1812 UTC
by Ray Lalleu
1 Replies
157 Views
Last post October 31, 2025, 1808 UTC
by Ray Lalleu
1 Replies
219 Views
Last post October 31, 2025, 1749 UTC
by dxace1
1 Replies
225 Views
Last post October 31, 2025, 1731 UTC
by Ray Lalleu
6 Replies
335 Views
Last post October 31, 2025, 1726 UTC
by Ray Lalleu
1 Replies
147 Views
Last post October 31, 2025, 1721 UTC
by Ray Lalleu
0 Replies
130 Views
Last post October 31, 2025, 1717 UTC
by Ray Lalleu
0 Replies
134 Views
Last post October 31, 2025, 1657 UTC
by Ray Lalleu
0 Replies
181 Views
Last post October 31, 2025, 1637 UTC
by Ray Lalleu
0 Replies
130 Views
Last post October 31, 2025, 1635 UTC
by Ray Lalleu
0 Replies
149 Views
Last post October 31, 2025, 1608 UTC
by Alex BLR
1 Replies
166 Views
Last post October 31, 2025, 1508 UTC
by Pascal
2 Replies
173 Views
Last post October 31, 2025, 1503 UTC
by M7HVG
0 Replies
128 Views
Last post October 31, 2025, 1449 UTC
by Ray Lalleu
1 Replies
180 Views
Last post October 31, 2025, 1407 UTC
by dxace1

 

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