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 permissable in your locale.

Subject / Started by Last post
6 Replies
981 Views
Last post September 29, 2021, 1220 UTC
by ChrisSmolinski
0 Replies
454 Views
Last post September 27, 2021, 1602 UTC
by ChrisSmolinski
0 Replies
414 Views
Last post September 27, 2021, 1447 UTC
by ChrisSmolinski
0 Replies
452 Views
Last post September 26, 2021, 2231 UTC
by ZFT
2 Replies
751 Views
Last post September 26, 2021, 0214 UTC
by McRadioface
4 Replies
1426 Views
Last post September 21, 2021, 1526 UTC
by R4002
0 Replies
456 Views
Last post September 21, 2021, 1254 UTC
by ChrisSmolinski
5 Replies
1080 Views
Last post September 18, 2021, 1508 UTC
by ChrisSmolinski
0 Replies
442 Views
Last post September 14, 2021, 2330 UTC
by kris
0 Replies
497 Views
Last post September 04, 2021, 0009 UTC
by K9KFX
8281 USB

Started by HarryHydro

1 Replies
650 Views
Last post August 26, 2021, 2132 UTC
by HarryHydro
2 Replies
1062 Views
Last post August 26, 2021, 2130 UTC
by HarryHydro
0 Replies
513 Views
Last post August 17, 2021, 0245 UTC
by myteaquinn
1 Replies
926 Views
Last post July 11, 2021, 0355 UTC
by kandi
UNID Spanish 27965kHz

Started by housecat

0 Replies
460 Views
Last post July 10, 2021, 0033 UTC
by housecat
2 Replies
764 Views
Last post July 09, 2021, 0509 UTC
by Rizla
0 Replies
528 Views
Last post July 02, 2021, 2243 UTC
by kris
0 Replies
600 Views
Last post June 02, 2021, 2145 UTC
by ~SIGINT~
0 Replies
643 Views
Last post May 12, 2021, 1952 UTC
by kris
0 Replies
515 Views
Last post May 11, 2021, 1941 UTC
by kris

 

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