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 permissable in your locale.

Subject / Started by Last post
1 Replies
771 Views
Last post February 20, 2022, 1429 UTC
by NJQA
0 Replies
783 Views
Last post June 04, 2021, 1830 UTC
by ThaDood
0 Replies
802 Views
Last post October 01, 2020, 1747 UTC
by ThaDood
1 Replies
808 Views
Last post September 21, 2020, 1148 UTC
by ChrisSmolinski
1 Replies
808 Views
Last post September 08, 2021, 2241 UTC
by RobRich
10 Replies
808 Views
Last post September 01, 2022, 2213 UTC
by JustGreg
1 Replies
836 Views
Last post November 15, 2020, 0249 UTC
by redhat
1 Replies
840 Views
Last post December 25, 2020, 0013 UTC
by Kingbear Radio
11 Replies
863 Views
Last post December 22, 2022, 2247 UTC
by Pigmeat
1 Replies
869 Views
Last post October 11, 2020, 0505 UTC
by tybee
1 Replies
932 Views
Last post October 03, 2021, 1328 UTC
by Finman
3 Replies
1015 Views
Last post April 30, 2022, 0943 UTC
by secretlab
Helical antenna

Started by Brian

3 Replies
1070 Views
Last post January 03, 2021, 2205 UTC
by Brian
2 Replies
1086 Views
Last post April 05, 2020, 1751 UTC
by ThaDood
4 Replies
1095 Views
Last post June 22, 2022, 1843 UTC
by ThaDood
4 Replies
1153 Views
Last post October 01, 2020, 1704 UTC
by JimIO
4 Replies
1182 Views
Last post October 06, 2020, 1723 UTC
by JimIO
13.56 MHz Antennas

Started by k6sti

2 Replies
1263 Views
Last post October 08, 2021, 1959 UTC
by Finman
5 Replies
1357 Views
Last post December 25, 2020, 0206 UTC
by Kingbear Radio
4 Replies
1381 Views
Last post January 11, 2021, 0944 UTC
by tybee

 

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