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
2 Replies
290 Views
Last post December 27, 2022, 0042 UTC
by Pigmeat
0 Replies
350 Views
Last post December 24, 2019, 1426 UTC
by Ray Lalleu
1 Replies
300 Views
Last post August 26, 2023, 1830 UTC
by Intruder
1 Replies
597 Views
Last post June 07, 2025, 2059 UTC
by m3ozp1
0 Replies
307 Views
Last post July 03, 2020, 1645 UTC
by Ray Lalleu
0 Replies
351 Views
Last post May 22, 2021, 1224 UTC
by Ray Lalleu
0 Replies
513 Views
Last post March 23, 2022, 1746 UTC
by Ray Lalleu
0 Replies
264 Views
Last post March 05, 2024, 0738 UTC
by Ray Lalleu
0 Replies
343 Views
Last post April 08, 2020, 2017 UTC
by Ray Lalleu
0 Replies
353 Views
Last post January 03, 2021, 1605 UTC
by Ray Lalleu
0 Replies
388 Views
Last post December 17, 2021, 1537 UTC
by Ray Lalleu
1 Replies
232 Views
Last post December 09, 2023, 1223 UTC
by kris
0 Replies
451 Views
Last post October 01, 2018, 1902 UTC
by Ray Lalleu
0 Replies
301 Views
Last post October 09, 2020, 1021 UTC
by Ray Lalleu
0 Replies
411 Views
Last post June 21, 2022, 1943 UTC
by Ray Lalleu
0 Replies
367 Views
Last post June 29, 2019, 1501 UTC
by Ray Lalleu
0 Replies
215 Views
Last post March 11, 2023, 1714 UTC
by Ray Lalleu
0 Replies
161 Views
Last post January 30, 2025, 1646 UTC
by Ray Lalleu
0 Replies
305 Views
Last post March 06, 2020, 1601 UTC
by Ray Lalleu
1 Replies
412 Views
Last post November 06, 2021, 0937 UTC
by Bali_Frank

 

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