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
42903 Views
Last post October 22, 2019, 2122 UTC
by HERMANROCKS
3 Replies
2259 Views
Last post June 26, 2020, 1735 UTC
by Josh
Intermixing of SW and headphones

Started by bandarr3000

3 Replies
2585 Views
Last post April 13, 2018, 1257 UTC
by pinto vortando
3 Replies
2109 Views
Last post September 28, 2019, 2335 UTC
by Exo
Propagation

Started by Fansome

3 Replies
2918 Views
Last post August 26, 2018, 2048 UTC
by ChrisSmolinski
3 Replies
2592 Views
Last post November 09, 2021, 1347 UTC
by NQC
3 Replies
3468 Views
Last post April 11, 2019, 2143 UTC
by Josh
4 Replies
3779 Views
Last post December 18, 2017, 2222 UTC
by Strange Beacons
4 Replies
2499 Views
Last post September 05, 2018, 1430 UTC
by jFarley
4 Replies
5654 Views
Last post December 14, 2017, 0005 UTC
by pinto vortando
4 Replies
2442 Views
Last post August 28, 2022, 1843 UTC
by Josh
Propagation

Started by Fansome

4 Replies
3161 Views
Last post December 04, 2019, 2036 UTC
by KaySeeks
5 Replies
3754 Views
Last post April 30, 2018, 1434 UTC
by ChrisSmolinski
5 Replies
4911 Views
Last post January 26, 2019, 1640 UTC
by legis225
5 Replies
4424 Views
Last post March 21, 2019, 1515 UTC
by ChrisSmolinski
5 Replies
2592 Views
Last post November 14, 2020, 1925 UTC
by pinto vortando
5 Replies
4638 Views
Last post October 01, 2018, 2306 UTC
by ChrisSmolinski
5 Replies
2956 Views
Last post February 12, 2021, 1043 UTC
by Charlie_Dont_Surf
5 Replies
4292 Views
Last post November 19, 2018, 1648 UTC
by sat_dxer
5 Replies
3285 Views
Last post September 23, 2019, 2136 UTC
by Josh

 

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