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
32 Replies
11076 Views
Last post October 10, 2018, 1207 UTC
by R4002
35 Replies
70655 Views
Last post September 28, 2019, 1435 UTC
by R4002
21 Replies
7162 Views
Last post August 10, 2018, 1700 UTC
by R4002
New here

Started by SBS01

1 Replies
2194 Views
Last post March 02, 2020, 0001 UTC
by Matt285
1 Replies
8635 Views
Last post October 14, 2015, 2320 UTC
by ChrisSmolinski
0 Replies
3509 Views
Last post December 11, 2014, 1022 UTC
by dxextra
1 Replies
1924 Views
Last post June 09, 2020, 0013 UTC
by Rob.
Mystery Signal

Started by Matt_B

2 Replies
2708 Views
Last post May 18, 2020, 1752 UTC
by Josh
0 Replies
739 Views
Last post July 22, 2023, 2331 UTC
by TRI International
0 Replies
11640 Views
Last post August 01, 2019, 1908 UTC
by ChrisSmolinski
0 Replies
2974 Views
Last post August 09, 2019, 1143 UTC
by ChrisSmolinski
0 Replies
849 Views
Last post February 20, 2024, 1229 UTC
by R4002
1 Replies
679 Views
Last post December 18, 2024, 1208 UTC
by R4002
4 Replies
3680 Views
Last post January 30, 2020, 1336 UTC
by R4002
8 Replies
3374 Views
Last post October 13, 2023, 0223 UTC
by ~SIGINT~
0 Replies
5653 Views
Last post April 29, 2013, 1926 UTC
by w5cdt
0 Replies
4255 Views
Last post May 14, 2013, 2335 UTC
by w5cdt
0 Replies
778 Views
Last post February 15, 2023, 1506 UTC
by R4002
L band monitoring

Started by Josh

0 Replies
2802 Views
Last post September 06, 2019, 1732 UTC
by Josh
0 Replies
3351 Views
Last post April 19, 2019, 1834 UTC
by Josh

 

Normal Topic
Hot Topic (More than 15 replies)
Very Hot Topic (More than 25 replies)

Locked Topic
Sticky Topic
Poll


HFUnderground Mug
HFUnderground Mug
by MitchellTimeDesigns