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
0 Replies
1322 Views
Last post January 01, 2024, 1251 UTC
by ChrisSmolinski
0 Replies
11902 Views
Last post August 27, 2019, 1109 UTC
by ChrisSmolinski
0 Replies
1312 Views
Last post June 26, 2023, 1413 UTC
by ChrisSmolinski
0 Replies
2405 Views
Last post December 17, 2016, 1748 UTC
by ChrisSmolinski
0 Replies
1011 Views
Last post April 13, 2023, 1522 UTC
by Shortwave_Listener
0 Replies
1088 Views
Last post December 23, 2022, 0640 UTC
by Shortwave_Listener
0 Replies
4422 Views
Last post December 04, 2018, 0354 UTC
by Kilokat7
0 Replies
1199 Views
Last post December 08, 2023, 1938 UTC
by ChrisSmolinski
0 Replies
1261 Views
Last post May 09, 2024, 1246 UTC
by ChrisSmolinski
0 Replies
2370 Views
Last post January 09, 2017, 1125 UTC
by ChrisSmolinski
0 Replies
1292 Views
Last post January 05, 2021, 1034 UTC
by ChrisSmolinski
0 Replies
1319 Views
Last post February 03, 2022, 1219 UTC
by ChrisSmolinski
0 Replies
1258 Views
Last post February 16, 2021, 0006 UTC
by ChrisSmolinski
0 Replies
1208 Views
Last post February 16, 2021, 0005 UTC
by ChrisSmolinski
0 Replies
2498 Views
Last post June 11, 2025, 1647 UTC
by ChrisSmolinski
0 Replies
2525 Views
Last post December 23, 2016, 2340 UTC
by ChrisSmolinski
0 Replies
1299 Views
Last post November 25, 2023, 1308 UTC
by ChrisSmolinski
0 Replies
1375 Views
Last post February 06, 2022, 1500 UTC
by ChrisSmolinski
0 Replies
1267 Views
Last post February 05, 2024, 1106 UTC
by ChrisSmolinski
0 Replies
1149 Views
Last post December 20, 2023, 0657 UTC
by Shortwave_Listener

 

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