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
0 Replies
180 Views
Last post October 16, 2025, 1858 UTC
by Ray Lalleu
0 Replies
582 Views
Last post November 16, 2018, 2300 UTC
by Ray Lalleu
0 Replies
435 Views
Last post November 11, 2020, 1623 UTC
by Ray Lalleu
0 Replies
478 Views
Last post October 17, 2021, 0943 UTC
by Ray Lalleu
0 Replies
282 Views
Last post October 10, 2023, 1506 UTC
by Ray Lalleu
3 Replies
376 Views
Last post July 19, 2025, 1919 UTC
by Ray Lalleu
0 Replies
414 Views
Last post August 21, 2019, 1911 UTC
by Ray Lalleu
0 Replies
394 Views
Last post May 17, 2021, 1934 UTC
by Ray Lalleu
0 Replies
425 Views
Last post April 24, 2022, 0813 UTC
by Ray Lalleu
0 Replies
325 Views
Last post April 12, 2024, 0736 UTC
by Ray Lalleu
0 Replies
467 Views
Last post April 19, 2019, 1036 UTC
by Ray Lalleu
1 Replies
493 Views
Last post February 09, 2021, 1425 UTC
by kris
0 Replies
287 Views
Last post December 24, 2022, 1104 UTC
by Ray Lalleu
0 Replies
409 Views
Last post December 21, 2019, 1041 UTC
by Ray Lalleu
0 Replies
252 Views
Last post August 20, 2023, 1705 UTC
by Ray Lalleu
2 Replies
767 Views
Last post June 03, 2025, 2136 UTC
by kris
0 Replies
339 Views
Last post June 28, 2020, 1655 UTC
by Ray Lalleu
0 Replies
313 Views
Last post March 02, 2024, 1808 UTC
by Ray Lalleu
1 Replies
841 Views
Last post February 17, 2019, 2036 UTC
by NO2CW
0 Replies
423 Views
Last post April 05, 2020, 1622 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