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 permissable in your locale.

Subject / Started by Last post
0 Replies
894 Views
Last post June 30, 2017, 1456 UTC
by R4002
1 Replies
896 Views
Last post November 12, 2019, 2200 UTC
by shadypyro
0 Replies
898 Views
Last post November 03, 2015, 1802 UTC
by flexoman61
2 Replies
900 Views
Last post May 31, 2019, 1308 UTC
by ChrisSmolinski
0 Replies
904 Views
Last post February 07, 2016, 1605 UTC
by ChrisSmolinski
0 Replies
904 Views
Last post June 30, 2017, 1535 UTC
by R4002
1 Replies
904 Views
Last post August 03, 2018, 1802 UTC
by Josh
3 Replies
907 Views
Last post October 09, 2021, 0044 UTC
by ~SIGINT~
0 Replies
910 Views
Last post April 16, 2020, 2235 UTC
by 2WR3505
1 Replies
916 Views
Last post January 26, 2021, 1745 UTC
by Polar Bear
0 Replies
916 Views
Last post June 30, 2017, 1510 UTC
by R4002
1 Replies
918 Views
Last post August 01, 2018, 1731 UTC
by R4002
0 Replies
918 Views
Last post October 16, 2018, 2033 UTC
by R4002
3 Replies
919 Views
Last post February 18, 2020, 1834 UTC
by ChrisSmolinski
0 Replies
920 Views
Last post June 29, 2017, 1838 UTC
by R4002
5 Replies
921 Views
Last post October 17, 2021, 1907 UTC
by Elf36
0 Replies
926 Views
Last post December 23, 2019, 0718 UTC
by ThaDood
0 Replies
928 Views
Last post May 22, 2017, 1733 UTC
by R4002
0 Replies
931 Views
Last post January 24, 2019, 1748 UTC
by R4002
0 Replies
932 Views
Last post May 24, 2017, 0603 UTC
by RST111

 

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