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
3 Replies
2217 Views
Last post March 08, 2021, 0026 UTC
by Rizla
0 Replies
1735 Views
Last post June 19, 2020, 2309 UTC
by ThaDood
3 Replies
1688 Views
Last post December 28, 2019, 2119 UTC
by chanito
0 Replies
1221 Views
Last post June 04, 2022, 2021 UTC
by ThaDood
1 Replies
1832 Views
Last post February 09, 2021, 0057 UTC
by Traveling Wave
2 Replies
1974 Views
Last post June 23, 2020, 1814 UTC
by ThaDood
0 Replies
1657 Views
Last post December 11, 2019, 0735 UTC
by ThaDood
1 Replies
1274 Views
Last post April 30, 2023, 1718 UTC
by redhat
5 Replies
2545 Views
Last post February 08, 2021, 2056 UTC
by Traveling Wave
6 Replies
2607 Views
Last post June 15, 2020, 0032 UTC
by pinto vortando
0 Replies
1122 Views
Last post June 11, 2025, 1847 UTC
by ThaDood
0 Replies
1487 Views
Last post November 02, 2021, 1827 UTC
by ThaDood
4 Replies
2424 Views
Last post February 12, 2021, 1836 UTC
by ThaDood
0 Replies
1702 Views
Last post November 16, 2019, 1715 UTC
by ThaDood
13 Replies
5087 Views
Last post December 04, 2019, 0413 UTC
by Dude111
0 Replies
1778 Views
Last post January 05, 2021, 2018 UTC
by ThaDood
2 Replies
1914 Views
Last post April 27, 2020, 1946 UTC
by Josh
0 Replies
1530 Views
Last post May 30, 2025, 1359 UTC
by ThaDood
1 Replies
1940 Views
Last post January 02, 2021, 1033 UTC
by Rob.
3 Replies
2096 Views
Last post May 11, 2020, 0015 UTC
by ThaDood

 

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