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
506 Views
Last post August 08, 2021, 1001 UTC
by Bali_Frank
0 Replies
221 Views
Last post July 23, 2023, 1717 UTC
by Ray Lalleu
0 Replies
386 Views
Last post June 01, 2020, 1019 UTC
by Ray Lalleu
0 Replies
259 Views
Last post February 10, 2025, 0851 UTC
by Ray Lalleu
0 Replies
482 Views
Last post January 01, 2019, 1026 UTC
by Ray Lalleu
0 Replies
280 Views
Last post December 10, 2020, 1024 UTC
by Ray Lalleu
0 Replies
155 Views
Last post August 21, 2025, 1934 UTC
by Ray Lalleu
0 Replies
499 Views
Last post August 19, 2018, 0919 UTC
by Ray Lalleu
0 Replies
393 Views
Last post September 28, 2019, 1628 UTC
by Ray Lalleu
2 Replies
637 Views
Last post June 19, 2021, 1831 UTC
by Pravotorov
0 Replies
383 Views
Last post May 23, 2022, 1750 UTC
by Ray Lalleu
3 Replies
813 Views
Last post May 18, 2019, 1941 UTC
by cj468
0 Replies
361 Views
Last post March 11, 2021, 1624 UTC
by Ray Lalleu
0 Replies
252 Views
Last post February 04, 2023, 1018 UTC
by Ray Lalleu
0 Replies
416 Views
Last post January 27, 2020, 1759 UTC
by Ray Lalleu
0 Replies
190 Views
Last post July 06, 2025, 0859 UTC
by Ray Lalleu
1 Replies
519 Views
Last post July 30, 2020, 2247 UTC
by kris
2 Replies
588 Views
Last post April 13, 2022, 1555 UTC
by The Ether Hacker
2 Replies
410 Views
Last post April 06, 2025, 0824 UTC
by Benoit LEVEQUE
0 Replies
471 Views
Last post April 03, 2019, 2351 UTC
by Ray Lalleu

 

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