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
455 Views
Last post April 21, 2021, 1850 UTC
by kris
0 Replies
334 Views
Last post February 17, 2021, 1655 UTC
by Ray Lalleu
1 Replies
430 Views
Last post October 02, 2020, 1759 UTC
by kris
2 Replies
486 Views
Last post September 18, 2020, 1823 UTC
by kris
1 Replies
478 Views
Last post October 07, 2020, 1830 UTC
by Ray Lalleu
2 Replies
515 Views
Last post June 02, 2021, 1750 UTC
by Bali_Frank
1 Replies
624 Views
Last post September 23, 2020, 1826 UTC
by Ray Lalleu
2 Replies
691 Views
Last post February 24, 2021, 1821 UTC
by kris
2 Replies
578 Views
Last post June 30, 2021, 1834 UTC
by FOX
1 Replies
378 Views
Last post October 28, 2020, 1952 UTC
by kris
1 Replies
500 Views
Last post November 11, 2020, 1920 UTC
by Ray Lalleu
3 Replies
792 Views
Last post August 19, 2020, 2041 UTC
by ukdxer
3 Replies
783 Views
Last post July 20, 2020, 1957 UTC
by kris
1 Replies
416 Views
Last post September 02, 2020, 1847 UTC
by Bali_Frank
3 Replies
563 Views
Last post September 06, 2020, 1902 UTC
by Ray Lalleu
1 Replies
524 Views
Last post April 27, 2022, 1544 UTC
by Mad Radio DXer UK
1 Replies
510 Views
Last post October 20, 2021, 1656 UTC
by kobalts
2 Replies
558 Views
Last post September 01, 2021, 1924 UTC
by raypfaff
1 Replies
468 Views
Last post November 18, 2020, 1956 UTC
by Ray Lalleu
0 Replies
213 Views
Last post August 16, 2025, 2214 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 Garden Flag
by MitchellTimeDesigns