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
3 Replies
577 Views
Last post April 17, 2022, 1743 UTC
by Ray Lalleu
1 Replies
485 Views
Last post April 17, 2022, 1623 UTC
by Shortwave_Listener
1 Replies
352 Views
Last post October 31, 2022, 1719 UTC
by Ray Lalleu
0 Replies
435 Views
Last post November 20, 2021, 1528 UTC
by Magnitic
3 Replies
405 Views
Last post August 05, 2024, 1905 UTC
by Ray Lalleu
2 Replies
540 Views
Last post April 17, 2022, 1509 UTC
by dxhound2005
1 Replies
428 Views
Last post August 28, 2023, 1542 UTC
by Ray Lalleu
3 Replies
384 Views
Last post May 04, 2025, 1356 UTC
by Ray Lalleu
3 Replies
1376 Views
Last post August 03, 2014, 0054 UTC
by ChrisSmolinski
7 Replies
2518 Views
Last post November 15, 2014, 0043 UTC
by ChrisLobdell
4 Replies
684 Views
Last post April 18, 2022, 1917 UTC
by Ray Lalleu
1 Replies
441 Views
Last post April 05, 2022, 1859 UTC
by Ray Lalleu
1 Replies
478 Views
Last post March 07, 2022, 1846 UTC
by kris
0 Replies
152 Views
Last post March 15, 2025, 1929 UTC
by Mad Radio DXer UK
0 Replies
126 Views
Last post March 15, 2025, 1928 UTC
by Mad Radio DXer UK
1 Replies
150 Views
Last post April 23, 2025, 0914 UTC
by Benoit LEVEQUE
2 Replies
186 Views
Last post March 09, 2025, 1406 UTC
by Benoit LEVEQUE
5 Replies
785 Views
Last post March 22, 2022, 2012 UTC
by Mad Radio DXer UK
0 Replies
278 Views
Last post August 29, 2022, 1719 UTC
by Mad Radio DXer UK
2 Replies
503 Views
Last post April 27, 2022, 1705 UTC
by Misti-Radio

 

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