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
2886 Views
Last post January 15, 2018, 0026 UTC
by selcalweb
1 Replies
1795 Views
Last post January 07, 2018, 0436 UTC
by MegatonRange
1 Replies
1495 Views
Last post January 02, 2018, 1025 UTC
by linkz
1 Replies
909 Views
Last post October 29, 2022, 1921 UTC
by k5bdl
FAV22 Morse Training

Started by Elf36

1 Replies
677 Views
Last post October 22, 2022, 0000 UTC
by ~SIGINT~
1 Replies
684 Views
Last post October 09, 2022, 0359 UTC
by TheHappyWanker
1 Replies
1437 Views
Last post November 05, 2017, 0503 UTC
by Token
1 Replies
1836 Views
Last post October 26, 2017, 0346 UTC
by ve6jy
1 Replies
1471 Views
Last post October 25, 2017, 1626 UTC
by prldx
1 Replies
739 Views
Last post May 31, 2022, 0817 UTC
by iberiadx
1 Replies
1035 Views
Last post May 03, 2022, 2345 UTC
by JustGreg
1 Replies
1025 Views
Last post May 03, 2022, 0307 UTC
by ~SIGINT~
1 Replies
1358 Views
Last post October 04, 2017, 2046 UTC
by MegatonRange
1 Replies
6779 Views
Last post October 04, 2017, 2044 UTC
by MegatonRange
1 Replies
780 Views
Last post April 01, 2022, 2131 UTC
by ~SIGINT~
1 Replies
1405 Views
Last post October 04, 2017, 1501 UTC
by R4002
1 Replies
3155 Views
Last post October 03, 2017, 0916 UTC
by Looking-Glass
Echo 31

Started by AbnersFarm

1 Replies
909 Views
Last post March 27, 2022, 0240 UTC
by AbnersFarm
1 Replies
1284 Views
Last post September 30, 2017, 2307 UTC
by myteaquinn
1 Replies
1111 Views
Last post March 26, 2022, 1928 UTC
by Sparx

 

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