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
0 Replies
1995 Views
Last post November 16, 2019, 1715 UTC
by ThaDood
Amateur radio

Started by Matt285 « 1 2 »

20 Replies
13990 Views
Last post March 23, 2019, 1756 UTC
by Rizla
0 Replies
1422 Views
Last post August 19, 2023, 1834 UTC
by ThaDood
12 Replies
4012 Views
Last post February 09, 2022, 1851 UTC
by ThaDood
4 Replies
2868 Views
Last post February 05, 2024, 1939 UTC
by ThaDood
1 Replies
2145 Views
Last post February 09, 2021, 0057 UTC
by Traveling Wave
5 Replies
3191 Views
Last post February 08, 2021, 2056 UTC
by Traveling Wave
0 Replies
302 Views
Last post November 19, 2025, 2029 UTC
by ThaDood
1 Replies
1564 Views
Last post November 13, 2022, 0609 UTC
by Pigmeat
9 Replies
4922 Views
Last post October 06, 2021, 1531 UTC
by Finman
4 Replies
3425 Views
Last post December 08, 2020, 2037 UTC
by Rizla
3 Replies
2624 Views
Last post July 09, 2021, 1417 UTC
by NJQA
0 Replies
1940 Views
Last post October 07, 2025, 1532 UTC
by ThaDood
2 Replies
2229 Views
Last post April 27, 2020, 1946 UTC
by Josh
0 Replies
1757 Views
Last post November 29, 2021, 0541 UTC
by RobRich
3 Replies
1951 Views
Last post September 06, 2022, 1404 UTC
by Pigmeat
3 Replies
7162 Views
Last post July 15, 2025, 2147 UTC
by n2avh
2 Replies
2281 Views
Last post February 06, 2020, 2151 UTC
by Josh
6M Propagation ?

Started by Elf36

3 Replies
2478 Views
Last post October 15, 2021, 1343 UTC
by Elf36
6M opening

Started by Matt285

2 Replies
2039 Views
Last post May 12, 2021, 1752 UTC
by Matt285

 

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