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
5 Replies
654 Views
Last post May 20, 2025, 0109 UTC
by ChrisLobdell
2 Replies
654 Views
Last post September 26, 2022, 2001 UTC
by Zane
0 Replies
654 Views
Last post September 02, 2017, 1450 UTC
by ChrisSmolinski
1 Replies
654 Views
Last post September 16, 2021, 1613 UTC
by radiogaga
3 Replies
654 Views
Last post August 25, 2024, 1452 UTC
by Sealord
0 Replies
654 Views
Last post April 08, 2016, 1255 UTC
by ChrisSmolinski
2 Replies
654 Views
Last post September 04, 2024, 0211 UTC
by TheHappyWanker
0 Replies
654 Views
Last post January 12, 2016, 2314 UTC
by ChrisSmolinski
1 Replies
654 Views
Last post December 17, 2017, 2312 UTC
by slowtrain
0 Replies
654 Views
Last post March 29, 2021, 1209 UTC
by ChrisSmolinski
5 Replies
654 Views
Last post June 11, 2023, 0531 UTC
by Shortwave_Listener
2 Replies
654 Views
Last post December 20, 2018, 1055 UTC
by ChrisSmolinski
5 Replies
654 Views
Last post October 07, 2022, 2251 UTC
by Shortwave_Listener
5 Replies
654 Views
Last post March 24, 2023, 0312 UTC
by hsmith77
8 Replies
654 Views
Last post November 10, 2024, 2243 UTC
by Radiouser
0 Replies
654 Views
Last post April 02, 2016, 1526 UTC
by ChrisSmolinski
UNID 6925 AM 1755 11/1/15

Started by JoeFLIPS

1 Replies
654 Views
Last post November 01, 2015, 1758 UTC
by ChrisSmolinski
4 Replies
654 Views
Last post April 21, 2024, 1755 UTC
by Doc Roe
1 Replies
654 Views
Last post November 16, 2019, 0103 UTC
by Radio Star
9 Replies
654 Views
Last post March 10, 2024, 0222 UTC
by Paul65

 

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