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
Propagation

Started by Fansome

0 Replies
955 Views
Last post July 15, 2016, 2312 UTC
by Fansome
1 Replies
1592 Views
Last post March 22, 2011, 0546 UTC
by Zoidberg
1 Replies
1948 Views
Last post March 09, 2010, 0115 UTC
by syfr
Solar Cycle Update: Twin Peaks?

Started by Fansome

2 Replies
1245 Views
Last post March 09, 2013, 0350 UTC
by Fansome
4 Replies
1367 Views
Last post July 15, 2014, 0136 UTC
by ka1iic
Propagation

Started by Fansome

0 Replies
4922 Views
Last post September 26, 2008, 1801 UTC
by Fansome
0 Replies
1337 Views
Last post May 21, 2012, 0248 UTC
by Fansome
Propagation

Started by Fansome

0 Replies
1154 Views
Last post August 09, 2013, 2356 UTC
by Fansome
13 Replies
4687 Views
Last post February 21, 2011, 0058 UTC
by Zane
4 Replies
4117 Views
Last post January 03, 2010, 0444 UTC
by spore
Propagation

Started by Fansome

0 Replies
5010 Views
Last post July 18, 2008, 1940 UTC
by Fansome
0 Replies
1402 Views
Last post April 24, 2012, 2006 UTC
by Fansome
3 Replies
1445 Views
Last post July 22, 2013, 1303 UTC
by Pigmeat
Leonid meteor shower

Started by Fansome

0 Replies
1714 Views
Last post November 13, 2009, 2046 UTC
by Fansome
[UDXF] Night of Nights 2015!

Started by Fansome

0 Replies
1000 Views
Last post July 05, 2015, 2259 UTC
by Fansome
Propagation

Started by Fansome

1 Replies
973 Views
Last post January 13, 2018, 1008 UTC
by BoomboxDX
1 Replies
1971 Views
Last post November 02, 2010, 2315 UTC
by syfr
Are Sunspots Disappearing?

Started by Fansome

5 Replies
3095 Views
Last post September 19, 2009, 2018 UTC
by cpuerror
Propagation

Started by Fansome

0 Replies
786 Views
Last post June 15, 2013, 0259 UTC
by Fansome
1 Replies
1747 Views
Last post August 24, 2010, 0326 UTC
by Zoidberg

 

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