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
2 Replies
840 Views
Last post April 14, 2018, 1417 UTC
by hammarhead
2 Replies
840 Views
Last post July 25, 2021, 0249 UTC
by ~SIGINT~
0 Replies
840 Views
Last post January 11, 2019, 1811 UTC
by aurora
3 Replies
840 Views
Last post March 14, 2022, 2211 UTC
by hsmith77
1 Replies
840 Views
Last post September 06, 2021, 1210 UTC
by Syck0
0 Replies
840 Views
Last post April 05, 2020, 1557 UTC
by Andrew Yoder
3 Replies
840 Views
Last post June 03, 2024, 1411 UTC
by Ct Yankee
3 Replies
840 Views
Last post October 23, 2021, 0037 UTC
by Markokpik
7 Replies
840 Views
Last post January 04, 2025, 0301 UTC
by Molvania Poacher
3 Replies
840 Views
Last post July 10, 2019, 2055 UTC
by Rob.
0 Replies
840 Views
Last post May 13, 2016, 1255 UTC
by ChrisSmolinski
0 Replies
840 Views
Last post March 16, 2017, 1344 UTC
by ChrisSmolinski
0 Replies
840 Views
Last post March 05, 2017, 1615 UTC
by ChrisSmolinski
8 Replies
840 Views
Last post February 15, 2025, 1835 UTC
by N2MLP
1 Replies
840 Views
Last post February 13, 2016, 1703 UTC
by Andrew Yoder
2 Replies
840 Views
Last post December 24, 2018, 1432 UTC
by DimBulb
1 Replies
841 Views
Last post May 01, 2016, 1135 UTC
by JCMaxwell
1 Replies
841 Views
Last post December 10, 2018, 1915 UTC
by ChrisSmolinski
2 Replies
841 Views
Last post May 12, 2025, 0141 UTC
by Professor
1 Replies
841 Views
Last post December 07, 2016, 2153 UTC
by ChrisSmolinski

 

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