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
2601 Views
Last post September 09, 2018, 0156 UTC
by Terry
0 Replies
2598 Views
Last post June 11, 2025, 1809 UTC
by ThaDood
0 Replies
2592 Views
Last post September 06, 2017, 1221 UTC
by ChrisSmolinski
0 Replies
2561 Views
Last post September 05, 2017, 2238 UTC
by skeezix
4 Replies
2545 Views
Last post September 05, 2018, 1430 UTC
by jFarley
0 Replies
2497 Views
Last post April 17, 2018, 1052 UTC
by ChrisSmolinski
4 Replies
2491 Views
Last post August 28, 2022, 1843 UTC
by Josh
0 Replies
2486 Views
Last post September 29, 2018, 1043 UTC
by VK3BVW
2 Replies
2451 Views
Last post June 11, 2021, 1941 UTC
by ThaDood
1 Replies
2412 Views
Last post September 29, 2019, 2223 UTC
by staticlistener
0 Replies
2404 Views
Last post September 06, 2017, 0203 UTC
by skeezix
0 Replies
2316 Views
Last post September 25, 2018, 2228 UTC
by ChrisSmolinski
3 Replies
2288 Views
Last post June 26, 2020, 1735 UTC
by Josh
1 Replies
2286 Views
Last post June 19, 2021, 2346 UTC
by NQC
1 Replies
2269 Views
Last post August 28, 2018, 0431 UTC
by Josh
1 Replies
2225 Views
Last post March 26, 2018, 1909 UTC
by Josh
2 Replies
2204 Views
Last post June 04, 2021, 1832 UTC
by ThaDood
Propagation

Started by Fansome

1 Replies
2196 Views
Last post February 24, 2018, 1813 UTC
by Josh
2 Replies
2194 Views
Last post May 10, 2018, 1059 UTC
by ChrisSmolinski
3 Replies
2161 Views
Last post September 28, 2019, 2335 UTC
by Exo

 

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