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
1689 Views
Last post April 29, 2023, 0425 UTC
by John Poet
0 Replies
1690 Views
Last post June 05, 2011, 0607 UTC
by PiratePoptart
8 Replies
1690 Views
Last post October 09, 2018, 1725 UTC
by R4002
6 Replies
1692 Views
Last post June 08, 2024, 1713 UTC
by John Poet
0 Replies
1692 Views
Last post October 09, 2010, 0402 UTC
by Shortwave_America
4 Replies
1693 Views
Last post November 11, 2015, 0338 UTC
by Pigmeat
Success in contactng...

Started by Nella F.

5 Replies
1693 Views
Last post November 22, 2013, 1928 UTC
by Nella F.
3 Replies
1693 Views
Last post October 25, 2013, 0223 UTC
by Chanter
1 Replies
1694 Views
Last post October 29, 2012, 1432 UTC
by Jolly Roger
7 Replies
1694 Views
Last post May 19, 2023, 0105 UTC
by Shortwave_Listener
0 Replies
1696 Views
Last post May 06, 2011, 0120 UTC
by Sealord
1 Replies
1697 Views
Last post January 09, 2013, 2242 UTC
by jFarley
Overcoming Spectrum Scarcity

Started by Fansome

1 Replies
1697 Views
Last post August 31, 2012, 0112 UTC
by cmradio
0 Replies
1700 Views
Last post August 12, 2011, 0057 UTC
by John Poet
1 Replies
1701 Views
Last post February 07, 2013, 1528 UTC
by weaksigs
1 Replies
1701 Views
Last post April 14, 2012, 0239 UTC
by Zoidberg
4 Replies
1701 Views
Last post September 29, 2016, 0057 UTC
by Pigmeat
3 Replies
1701 Views
Last post June 29, 2017, 2106 UTC
by Pigmeat
Leonid meteor shower

Started by Fansome

0 Replies
1701 Views
Last post November 13, 2009, 2046 UTC
by Fansome
below 6900

Started by tvdxrools

3 Replies
1702 Views
Last post September 11, 2014, 1216 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