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
2 Replies
454 Views
Last post August 31, 2024, 0213 UTC
by N2MLP
1 Replies
385 Views
Last post August 20, 2022, 1944 UTC
by kris
1 Replies
583 Views
Last post September 17, 2021, 1713 UTC
by kris
0 Replies
350 Views
Last post November 21, 2020, 1636 UTC
by Ray Lalleu
0 Replies
414 Views
Last post December 30, 2019, 0821 UTC
by Ray Lalleu
0 Replies
458 Views
Last post December 01, 2018, 2020 UTC
by Ray Lalleu
0 Replies
147 Views
Last post October 23, 2025, 1544 UTC
by Ray Lalleu
0 Replies
292 Views
Last post December 02, 2024, 1755 UTC
by Ray Lalleu
0 Replies
249 Views
Last post January 25, 2024, 1605 UTC
by Ray Lalleu
0 Replies
449 Views
Last post February 18, 2021, 1330 UTC
by Ray Lalleu
0 Replies
485 Views
Last post April 27, 2019, 1735 UTC
by Ray Lalleu
0 Replies
352 Views
Last post May 04, 2022, 2028 UTC
by Ray Lalleu
0 Replies
163 Views
Last post August 02, 2025, 1928 UTC
by Ray Lalleu
2 Replies
630 Views
Last post October 30, 2021, 1154 UTC
by RainBrandy
0 Replies
385 Views
Last post February 27, 2020, 1455 UTC
by Ray Lalleu
1 Replies
298 Views
Last post January 18, 2025, 0829 UTC
by RainBrandy
2 Replies
460 Views
Last post March 02, 2023, 2019 UTC
by Ray Lalleu
2 Replies
504 Views
Last post April 02, 2021, 1958 UTC
by Bali_Frank
0 Replies
538 Views
Last post May 15, 2020, 1618 UTC
by Ray Lalleu
1 Replies
260 Views
Last post April 27, 2025, 0752 UTC
by Benoit LEVEQUE

 

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