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
HM01 11635 kHz AM 1807 02-07-14

Started by vhavrilko

0 Replies
1040 Views
Last post February 14, 2014, 1432 UTC
by vhavrilko
0 Replies
1039 Views
Last post January 30, 2023, 1322 UTC
by Sealord
2 Replies
1038 Views
Last post November 22, 2024, 2211 UTC
by kris
0 Replies
1038 Views
Last post November 28, 2015, 0401 UTC
by vhavrilko
0 Replies
1037 Views
Last post July 25, 2018, 2026 UTC
by skeezix
0 Replies
1037 Views
Last post November 28, 2022, 1359 UTC
by ~SIGINT~
V13, 7502 kHz, AM, 1319, 3-6-16

Started by vhavrilko

0 Replies
1034 Views
Last post March 06, 2016, 1320 UTC
by vhavrilko
1 Replies
1034 Views
Last post May 17, 2025, 2317 UTC
by shadypyro
0 Replies
1034 Views
Last post August 08, 2022, 1323 UTC
by ute_johnny
2 Replies
1034 Views
Last post December 14, 2024, 2215 UTC
by autovon
0 Replies
1032 Views
Last post September 13, 2021, 1256 UTC
by orourkeda
0 Replies
1032 Views
Last post October 19, 2018, 1444 UTC
by MDK2
0 Replies
1031 Views
Last post February 01, 2017, 2142 UTC
by Traveling Wave
0 Replies
1031 Views
Last post September 17, 2017, 1728 UTC
by Grzesiu_is_bae123
0 Replies
1031 Views
Last post July 16, 2018, 1953 UTC
by skeezix
0 Replies
1030 Views
Last post October 15, 2023, 0902 UTC
by TRI International
HM02

Started by Ary-B

0 Replies
1030 Views
Last post March 25, 2016, 1510 UTC
by Ary-B
0 Replies
1030 Views
Last post October 14, 2021, 1814 UTC
by orourkeda
0 Replies
1030 Views
Last post February 13, 2023, 1235 UTC
by Sealord
0 Replies
1029 Views
Last post April 07, 2018, 0020 UTC
by ChrisSmolinski

 

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