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
16 Replies
28317 Views
Last post December 31, 2019, 1409 UTC
by R4002
0 Replies
12759 Views
Last post April 15, 2017, 0413 UTC
by R4002
3 Replies
3323 Views
Last post June 24, 2025, 0118 UTC
by Shortwave_Listener
0 Replies
106 Views
Last post June 23, 2025, 2117 UTC
by Shortwave_Listener
0 Replies
408 Views
Last post June 19, 2025, 0459 UTC
by Shortwave_Listener
2 Replies
1308 Views
Last post May 17, 2025, 0120 UTC
by Tony_Pavick
0 Replies
1099 Views
Last post April 21, 2025, 0014 UTC
by DangerKitty
2 Replies
2846 Views
Last post April 13, 2025, 1256 UTC
by Yagiman
0 Replies
841 Views
Last post April 13, 2025, 0003 UTC
by Mick Boyle
2 Replies
1218 Views
Last post April 12, 2025, 0402 UTC
by Paul Turkk
0 Replies
933 Views
Last post April 11, 2025, 0359 UTC
by Shortwave_Listener
0 Replies
1377 Views
Last post April 04, 2025, 1634 UTC
by R4002
0 Replies
1643 Views
Last post March 17, 2025, 2302 UTC
by boston_strangler
0 Replies
4092 Views
Last post March 03, 2025, 0505 UTC
by Robot Matrix
1 Replies
4601 Views
Last post February 21, 2025, 2235 UTC
by Shortwave_Listener
0 Replies
1740 Views
Last post February 21, 2025, 2156 UTC
by R4002
0 Replies
1741 Views
Last post February 19, 2025, 1851 UTC
by bgqman
0 Replies
2146 Views
Last post February 17, 2025, 1942 UTC
by bgqman
0 Replies
2413 Views
Last post February 12, 2025, 1656 UTC
by R4002
0 Replies
1806 Views
Last post February 12, 2025, 1637 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 T-Shirt
by MitchellTimeDesigns