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
221 Views
Last post July 30, 2023, 0750 UTC
by Ray Lalleu
5 Replies
724 Views
Last post July 25, 2024, 0930 UTC
by europirate
0 Replies
223 Views
Last post May 17, 2025, 1947 UTC
by Ray Lalleu
0 Replies
369 Views
Last post June 07, 2020, 1022 UTC
by Ray Lalleu
22 Replies
3597 Views
Last post April 29, 2021, 0726 UTC
by dave1965
0 Replies
376 Views
Last post February 28, 2022, 1758 UTC
by Ray Lalleu
2 Replies
604 Views
Last post February 13, 2024, 2246 UTC
by AlexRadioDX
0 Replies
232 Views
Last post February 15, 2025, 2041 UTC
by Ray Lalleu
0 Replies
512 Views
Last post January 12, 2019, 0816 UTC
by Ray Lalleu
0 Replies
343 Views
Last post March 21, 2020, 1357 UTC
by Ray Lalleu
2 Replies
524 Views
Last post November 21, 2021, 1245 UTC
by Grey Fox
1 Replies
334 Views
Last post August 25, 2025, 1911 UTC
by Robertas
0 Replies
531 Views
Last post August 26, 2018, 0909 UTC
by Ray Lalleu
0 Replies
333 Views
Last post September 18, 2020, 1821 UTC
by Ray Lalleu
0 Replies
616 Views
Last post May 29, 2024, 1955 UTC
by Ray Lalleu
4 Replies
1268 Views
Last post May 25, 2019, 2250 UTC
by DimBulb
1 Replies
463 Views
Last post March 14, 2021, 1832 UTC
by TRI International
1 Replies
320 Views
Last post February 11, 2023, 1052 UTC
by Bali_Frank
0 Replies
187 Views
Last post December 29, 2024, 1622 UTC
by Ray Lalleu
3 Replies
823 Views
Last post February 03, 2020, 1510 UTC
by Harmony

 

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