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
20 Replies
1756 Views
Last post May 25, 2025, 0055 UTC
by BigAl
20 Replies
1787 Views
Last post June 21, 2025, 0150 UTC
by corq
20 Replies
4473 Views
Last post October 31, 2015, 1546 UTC
by ChrisSmolinski
20 Replies
4476 Views
Last post December 26, 2024, 1623 UTC
by N8BTR
20 Replies
3954 Views
Last post October 26, 2015, 0030 UTC
by JohnS
20 Replies
2165 Views
Last post September 08, 2022, 0220 UTC
by Pigmeat
20 Replies
2467 Views
Last post January 14, 2023, 0128 UTC
by myteaquinn
20 Replies
1817 Views
Last post February 25, 2024, 0312 UTC
by MDK2
20 Replies
6378 Views
Last post October 05, 2014, 1359 UTC
by ChrisLobdell
20 Replies
5657 Views
Last post August 07, 2016, 1444 UTC
by ChrisSmolinski
20 Replies
1681 Views
Last post May 24, 2025, 0234 UTC
by AlexRadioDX
20 Replies
2602 Views
Last post May 31, 2025, 0136 UTC
by Dr. Strangelove
20 Replies
5553 Views
Last post April 26, 2015, 2232 UTC
by oly1959
20 Replies
1794 Views
Last post January 28, 2024, 0124 UTC
by Dick Weed
20 Replies
4734 Views
Last post March 09, 2014, 0344 UTC
by Pigmeat
20 Replies
6452 Views
Last post March 27, 2015, 2216 UTC
by oly1959
20 Replies
3656 Views
Last post December 09, 2018, 1245 UTC
by Andrew Yoder
20 Replies
1478 Views
Last post January 07, 2025, 2325 UTC
by Sealord
20 Replies
1624 Views
Last post December 22, 2024, 0135 UTC
by elburndx
20 Replies
6686 Views
Last post March 11, 2015, 0034 UTC
by KillercatRadio

 

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