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
2241 Views
Last post June 13, 2024, 1748 UTC
by R4002
0 Replies
1847 Views
Last post November 27, 2024, 1137 UTC
by R4002
0 Replies
1047 Views
Last post February 16, 2023, 1434 UTC
by R4002
1 Replies
1157 Views
Last post July 09, 2023, 1316 UTC
by R4002
0 Replies
1029 Views
Last post May 25, 2023, 1207 UTC
by R4002
0 Replies
1048 Views
Last post February 10, 2023, 1057 UTC
by R4002
0 Replies
1146 Views
Last post January 29, 2024, 1249 UTC
by R4002
0 Replies
2097 Views
Last post October 22, 2024, 1457 UTC
by R4002
0 Replies
1062 Views
Last post July 13, 2023, 1621 UTC
by R4002
3 Replies
1472 Views
Last post December 14, 2023, 1517 UTC
by R4002
5 Replies
7019 Views
Last post April 18, 2017, 0214 UTC
by skeezix
10 Replies
3406 Views
Last post January 01, 2021, 1331 UTC
by refmo
CIS Cosmos sat

Started by Josh « 1 2 »

17 Replies
8669 Views
Last post December 29, 2018, 0409 UTC
by shadypyro
0 Replies
1087 Views
Last post February 10, 2023, 1745 UTC
by R4002
1 Replies
3079 Views
Last post November 08, 2024, 1340 UTC
by R4002
0 Replies
1708 Views
Last post January 30, 2024, 1607 UTC
by R4002
0 Replies
2370 Views
Last post July 30, 2024, 1113 UTC
by R4002
1 Replies
5943 Views
Last post April 22, 2017, 2142 UTC
by Strange Beacons
4 Replies
3134 Views
Last post December 29, 2019, 1835 UTC
by SV1XV
1 Replies
2794 Views
Last post June 04, 2024, 1436 UTC
by R4002

 

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