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
1 Replies
2738 Views
Last post March 17, 2010, 0120 UTC
by 4405486
7077 kHz

Started by Eric Bazar

4 Replies
7345 Views
Last post October 14, 2011, 1940 UTC
by Token
HM01

Started by Erik Mattson « 1 2 »

22 Replies
21539 Views
Last post August 20, 2019, 0015 UTC
by fpeconsultant
0 Replies
790 Views
Last post February 03, 2022, 0125 UTC
by Erik Mattson
0 Replies
856 Views
Last post January 06, 2022, 1816 UTC
by Erik Mattson
0 Replies
896 Views
Last post January 07, 2022, 1854 UTC
by Erik Mattson
3 Replies
1214 Views
Last post February 20, 2022, 0957 UTC
by tiNG
0 Replies
896 Views
Last post January 10, 2022, 1843 UTC
by Erik Mattson
HM01

Started by Erk86

0 Replies
1178 Views
Last post October 24, 2020, 2136 UTC
by Erk86
0 Replies
1347 Views
Last post June 22, 2014, 0812 UTC
by Essay
2 Replies
968 Views
Last post December 17, 2022, 0616 UTC
by Ary-B
0 Replies
2045 Views
Last post October 29, 2011, 0051 UTC
by ETM71
4 Replies
2259 Views
Last post October 31, 2011, 2104 UTC
by Token
V2 6772 0406 12/31/2012

Started by ETM71

2 Replies
1794 Views
Last post January 03, 2013, 1810 UTC
by sat_dxer
0 Replies
654 Views
Last post January 10, 2023, 1908 UTC
by Fairway07
1 Replies
1133 Views
Last post March 06, 2022, 1309 UTC
by Token
[Spooks] Cuban numbers stats

Started by Fansome

4 Replies
3832 Views
Last post June 21, 2017, 1638 UTC
by Strange Beacons
v2a 3927lsb 3/25/8 04:07

Started by Fansome

0 Replies
3409 Views
Last post March 25, 2008, 0408 UTC
by Fansome
0 Replies
6127 Views
Last post June 01, 2008, 0031 UTC
by Fansome
1 Replies
1799 Views
Last post January 31, 2013, 0051 UTC
by Token

 

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