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
317 Views
Last post October 08, 2023, 1509 UTC
by Ray Lalleu
0 Replies
283 Views
Last post February 16, 2024, 1750 UTC
by Ray Lalleu
2 Replies
425 Views
Last post February 25, 2024, 1612 UTC
by FOX
1 Replies
442 Views
Last post March 17, 2024, 1604 UTC
by kris
2 Replies
243 Views
Last post September 28, 2025, 1638 UTC
by Princo
0 Replies
243 Views
Last post July 02, 2023, 1044 UTC
by Ray Lalleu
0 Replies
174 Views
Last post October 25, 2025, 1508 UTC
by Ray Lalleu
1 Replies
512 Views
Last post June 23, 2024, 1414 UTC
by Benoit LEVEQUE
3 Replies
601 Views
Last post February 26, 2023, 1630 UTC
by Ray Lalleu
2 Replies
550 Views
Last post January 25, 2024, 1814 UTC
by Ray Lalleu
1 Replies
319 Views
Last post March 26, 2023, 1447 UTC
by kris
0 Replies
116 Views
Last post November 16, 2025, 1116 UTC
by Ray Lalleu
2 Replies
378 Views
Last post December 18, 2022, 1153 UTC
by Bali_Frank
1 Replies
490 Views
Last post February 24, 2024, 1432 UTC
by m3ozp1
1 Replies
392 Views
Last post November 19, 2023, 1445 UTC
by kris
2 Replies
219 Views
Last post November 26, 2025, 1530 UTC
by Alex BLR
1 Replies
546 Views
Last post October 25, 2023, 1520 UTC
by europirate
1 Replies
388 Views
Last post May 17, 2024, 0845 UTC
by Benoit LEVEQUE
0 Replies
181 Views
Last post October 16, 2025, 1524 UTC
by Ray Lalleu
1 Replies
163 Views
Last post December 07, 2025, 1637 UTC
by RadioLongWire

 

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