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
14 Replies
761 Views
Last post May 24, 2025, 0109 UTC
by elburndx
10 Replies
788 Views
Last post May 24, 2025, 0117 UTC
by Quasar
19 Replies
1262 Views
Last post May 24, 2025, 0129 UTC
by J. Carlos Pérez Montero
20 Replies
1286 Views
Last post May 24, 2025, 0234 UTC
by AlexRadioDX
8 Replies
676 Views
Last post May 24, 2025, 0234 UTC
by Under Dog
11 Replies
907 Views
Last post May 24, 2025, 0235 UTC
by Zoidberg
15 Replies
1134 Views
Last post May 24, 2025, 0355 UTC
by Andrew Yoder
27 Replies
1921 Views
Last post May 24, 2025, 0427 UTC
by dxace1
23 Replies
1689 Views
Last post May 24, 2025, 1740 UTC
by Tony_Pavick
4 Replies
600 Views
Last post May 24, 2025, 1743 UTC
by Tony_Pavick
10 Replies
1009 Views
Last post May 24, 2025, 2246 UTC
by Radio Star
25 Replies
2092 Views
Last post May 25, 2025, 0046 UTC
by Quasar
20 Replies
1428 Views
Last post May 25, 2025, 0055 UTC
by BigAl
14 Replies
2006 Views
Last post May 25, 2025, 0109 UTC
by refmo
10 Replies
969 Views
Last post May 25, 2025, 0134 UTC
by space junk radio
12 Replies
1656 Views
Last post May 25, 2025, 0213 UTC
by Killercat
14 Replies
1100 Views
Last post May 25, 2025, 0225 UTC
by MDK2
14 Replies
1176 Views
Last post May 25, 2025, 0243 UTC
by ChrisLobdell
0 Replies
266 Views
Last post May 25, 2025, 0308 UTC
by DangerKitty
8 Replies
826 Views
Last post May 25, 2025, 0401 UTC
by Molvania Poacher

 

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