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
4 Replies
3305 Views
Last post November 12, 2018, 2330 UTC
by Exo
1 Replies
1436 Views
Last post August 12, 2024, 2154 UTC
by Weatherman
3 Replies
1869 Views
Last post September 17, 2022, 0252 UTC
by HQ180
"YSO" and "RF" This morning

Started by Finman

0 Replies
1371 Views
Last post September 29, 2021, 1415 UTC
by Finman
"T" Freq. 13563.45 Khz

Started by dogman

6 Replies
1981 Views
Last post July 03, 2021, 1529 UTC
by dogman
2 Replies
1745 Views
Last post October 24, 2021, 1557 UTC
by Dave Richards
0 Replies
1920 Views
Last post August 16, 2018, 1504 UTC
by ka1iic
1 Replies
1480 Views
Last post January 14, 2022, 2006 UTC
by Prairiedog
"K6FRC" AND "RF" This Morning

Started by Finman

0 Replies
1436 Views
Last post October 03, 2021, 1414 UTC
by Finman
"II" ?

Started by Finman

4 Replies
2853 Views
Last post November 06, 2017, 1308 UTC
by Finman
2 Replies
1717 Views
Last post September 21, 2021, 1052 UTC
by ChrisSmolinski
3 Replies
2210 Views
Last post April 26, 2022, 0001 UTC
by Sparx
0 Replies
1137 Views
Last post February 20, 2022, 1754 UTC
by Finman
0 Replies
41 Views
Last post May 01, 2025, 0158 UTC
by ve6pg

 

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