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
694 Views
Last post April 16, 2019, 2346 UTC
by Radio Star
0 Replies
425 Views
Last post February 07, 2021, 1810 UTC
by Ray Lalleu
1 Replies
497 Views
Last post December 16, 2019, 1957 UTC
by FOX
0 Replies
416 Views
Last post September 04, 2021, 1451 UTC
by Ray Lalleu
2 Replies
476 Views
Last post June 26, 2020, 2204 UTC
by kris
3 Replies
878 Views
Last post March 19, 2022, 1254 UTC
by poshguy
0 Replies
254 Views
Last post March 01, 2024, 1934 UTC
by Ray Lalleu
0 Replies
420 Views
Last post February 16, 2019, 0804 UTC
by Ray Lalleu
0 Replies
384 Views
Last post December 31, 2020, 1037 UTC
by Ray Lalleu
2 Replies
431 Views
Last post October 22, 2022, 1643 UTC
by Bricklayer
0 Replies
183 Views
Last post December 03, 2023, 1058 UTC
by Ray Lalleu
2 Replies
384 Views
Last post October 17, 2024, 1602 UTC
by dxace1
0 Replies
321 Views
Last post October 03, 2020, 1517 UTC
by Ray Lalleu
0 Replies
331 Views
Last post June 16, 2022, 1945 UTC
by Ray Lalleu
0 Replies
209 Views
Last post July 01, 2023, 0906 UTC
by Ray Lalleu
1 Replies
255 Views
Last post June 23, 2024, 1903 UTC
by Grey Fox
1 Replies
302 Views
Last post April 28, 2025, 1734 UTC
by Ray Lalleu
4 Replies
1220 Views
Last post June 21, 2019, 2240 UTC
by DimBulb
2 Replies
543 Views
Last post April 04, 2021, 1419 UTC
by TRI International
4 Replies
579 Views
Last post March 04, 2023, 2301 UTC
by Radio Star

 

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