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
5 Replies
1925 Views
Last post April 14, 2020, 2350 UTC
by jasmine
6 Replies
6652 Views
Last post November 20, 2023, 0014 UTC
by DJFrederick
6 Replies
2764 Views
Last post January 12, 2023, 1526 UTC
by manfred
Phone patches

Started by Matt285

6 Replies
1944 Views
Last post February 05, 2019, 2121 UTC
by sat_dxer
6 Replies
6608 Views
Last post May 06, 2021, 1038 UTC
by F1GOC
6 Replies
1524 Views
Last post July 29, 2021, 2339 UTC
by ~SIGINT~
6 Replies
2575 Views
Last post August 26, 2013, 1748 UTC
by ka1iic
6 Replies
2186 Views
Last post April 17, 2023, 1213 UTC
by Token
6 Replies
2343 Views
Last post August 18, 2020, 2036 UTC
by sat_dxer
6 Replies
1642 Views
Last post August 04, 2020, 0024 UTC
by skeezix
6 Replies
3262 Views
Last post May 10, 2017, 1700 UTC
by Josh
6 Replies
3979 Views
Last post January 18, 2012, 0111 UTC
by Token
6 Replies
3220 Views
Last post April 28, 2020, 0956 UTC
by prldx
6 Replies
2511 Views
Last post February 24, 2022, 1408 UTC
by sat_dxer
6 Replies
609 Views
Last post December 07, 2024, 0830 UTC
by tiNG
6 Replies
3398 Views
Last post June 30, 2014, 0152 UTC
by JohnS
6 Replies
5916 Views
Last post March 01, 2014, 1715 UTC
by Antennae
6 Replies
3892 Views
Last post March 04, 2025, 1418 UTC
by autovon
6 Replies
6474 Views
Last post August 23, 2012, 1124 UTC
by ChrisSmolinski
6 Replies
6545 Views
Last post February 16, 2022, 1622 UTC
by sat_dxer

 

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