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
12 Replies
3284 Views
Last post April 09, 2020, 1108 UTC
by Matt_B
9 Replies
1954 Views
Last post May 13, 2023, 2233 UTC
by Ray Lalleu
2 Replies
1351 Views
Last post July 12, 2014, 1021 UTC
by John Poet
1 Replies
930 Views
Last post July 24, 2020, 1800 UTC
by ThaDood
0 Replies
998 Views
Last post October 20, 2023, 1306 UTC
by ChrisSmolinski
14 Replies
2453 Views
Last post April 29, 2023, 0332 UTC
by John Poet
4 Replies
1726 Views
Last post October 30, 2013, 1713 UTC
by diymedia
3 Replies
1843 Views
Last post July 10, 2017, 2333 UTC
by skeezix
2 Replies
1023 Views
Last post July 02, 2023, 0223 UTC
by Kingbear Radio
2 Replies
1178 Views
Last post March 27, 2025, 0219 UTC
by Molvania Poacher
15 Replies
11321 Views
Last post June 05, 2022, 0055 UTC
by Pigmeat
1 Replies
1664 Views
Last post June 10, 2010, 0144 UTC
by cmradio
0 Replies
863 Views
Last post April 07, 2019, 1256 UTC
by NJQA
3 Replies
1377 Views
Last post November 27, 2015, 1731 UTC
by ka1iic
2 Replies
2376 Views
Last post May 27, 2009, 2242 UTC
by cmradio
1 Replies
1927 Views
Last post December 13, 2010, 0022 UTC
by L Cee
0 Replies
1374 Views
Last post March 28, 2012, 0349 UTC
by Fansome
6 Replies
1820 Views
Last post November 23, 2018, 2310 UTC
by Looking-Glass
1 Replies
815 Views
Last post May 27, 2023, 1617 UTC
by Molvania Poacher
3 Replies
1179 Views
Last post August 14, 2021, 0052 UTC
by redhat

 

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