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
843 Views
Last post December 14, 2023, 1524 UTC
by R4002
0 Replies
985 Views
Last post January 13, 2023, 1415 UTC
by R4002
0 Replies
2046 Views
Last post November 29, 2020, 0306 UTC
by alleycat
0 Replies
1850 Views
Last post December 24, 2020, 1548 UTC
by SBS01
0 Replies
894 Views
Last post November 17, 2022, 1520 UTC
by R4002
0 Replies
880 Views
Last post November 10, 2023, 1819 UTC
by R4002
0 Replies
948 Views
Last post July 13, 2023, 1621 UTC
by R4002
0 Replies
1924 Views
Last post February 19, 2021, 1838 UTC
by ThaDood
0 Replies
898 Views
Last post February 15, 2023, 1506 UTC
by R4002
0 Replies
1978 Views
Last post March 25, 2021, 1749 UTC
by ChrisSmolinski
0 Replies
1130 Views
Last post February 20, 2024, 1225 UTC
by R4002
0 Replies
1608 Views
Last post November 27, 2024, 1137 UTC
by R4002
0 Replies
965 Views
Last post July 25, 2023, 1814 UTC
by R4002
0 Replies
2305 Views
Last post March 22, 2024, 1617 UTC
by R4002
1 Replies
7384 Views
Last post December 10, 2013, 2315 UTC
by ChrisSmolinski
1 Replies
834 Views
Last post June 21, 2025, 2016 UTC
by MickeyFinn
1 Replies
13569 Views
Last post June 23, 2016, 2210 UTC
by RobRich
Starlink Beacons

Started by NJQA

1 Replies
2419 Views
Last post December 10, 2021, 1749 UTC
by Josh
VHF Marine and NOAA distance

Started by Matt285

1 Replies
2260 Views
Last post February 13, 2020, 2153 UTC
by R4002
New here

Started by SBS01

1 Replies
2405 Views
Last post March 02, 2020, 0001 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 Garden Flag
by MitchellTimeDesigns