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
3 Replies
1650 Views
Last post December 25, 2015, 0212 UTC
by myteaquinn
3 Replies
1956 Views
Last post December 13, 2015, 2054 UTC
by Oliver
3 Replies
1499 Views
Last post December 07, 2015, 1800 UTC
by ChrisSmolinski
3 Replies
1049 Views
Last post December 17, 2020, 2207 UTC
by kris
3 Replies
1062 Views
Last post October 09, 2020, 1633 UTC
by skyman
3 Replies
1022 Views
Last post February 04, 2021, 0123 UTC
by CJammer
3 Replies
1364 Views
Last post March 30, 2020, 2143 UTC
by Azimuth Coordinator
3 Replies
1288 Views
Last post August 31, 2020, 0223 UTC
by Rurik
3 Replies
2482 Views
Last post April 18, 2013, 1943 UTC
by Pigmeat
3 Replies
1872 Views
Last post March 23, 2014, 0000 UTC
by rdla4
Some unknown signals

Started by 07code04stalker1776

3 Replies
2486 Views
Last post April 03, 2013, 1813 UTC
by Token
3 Replies
2334 Views
Last post March 22, 2013, 1746 UTC
by Token
3 Replies
1750 Views
Last post September 14, 2018, 0626 UTC
by Matt_B
3 Replies
1537 Views
Last post October 29, 2018, 0809 UTC
by bumbelstock
3 Replies
2282 Views
Last post March 13, 2014, 0343 UTC
by AbnersFarm
3 Replies
1936 Views
Last post September 16, 2018, 1208 UTC
by ChrisSmolinski
3 Replies
1768 Views
Last post July 31, 2015, 0103 UTC
by ChrisSmolinski
3 Replies
1515 Views
Last post December 11, 2013, 1740 UTC
by OldSeaRock
3 Replies
2300 Views
Last post September 02, 2017, 0240 UTC
by slowtrain
music under WWV 15000, Dec. 16

Started by Newfoundland DXer

3 Replies
1820 Views
Last post December 16, 2012, 1601 UTC
by Beerus Maximus

 

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