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
1 Replies
1795 Views
Last post September 12, 2015, 2313 UTC
by ChrisSmolinski
2 Replies
2174 Views
Last post March 27, 2013, 2321 UTC
by Land5urfer
0 Replies
1928 Views
Last post February 18, 2016, 0607 UTC
by CoolAM Radio
3 Replies
1179 Views
Last post May 11, 2024, 0554 UTC
by tiNG
4 Replies
3245 Views
Last post March 13, 2016, 1636 UTC
by Josh
6 Replies
3471 Views
Last post March 30, 2013, 0329 UTC
by Land5urfer
2 Replies
3746 Views
Last post December 10, 2010, 2002 UTC
by Zoidberg
0 Replies
779 Views
Last post January 10, 2023, 1405 UTC
by TRI International
4 Replies
1979 Views
Last post March 06, 2016, 1244 UTC
by catmandoes
3 Replies
5665 Views
Last post July 26, 2009, 2300 UTC
by 4405486
2 Replies
3693 Views
Last post December 06, 2009, 0551 UTC
by Lima Indigo
0 Replies
2656 Views
Last post July 05, 2010, 1835 UTC
by desmoface
3 Replies
18380 Views
Last post June 18, 2014, 1421 UTC
by Token
12 Replies
10097 Views
Last post April 03, 2010, 2232 UTC
by 4405486
The Buzzer

Started by orourkeda

0 Replies
1369 Views
Last post March 04, 2022, 2136 UTC
by orourkeda
The Buzzer

Started by orourkeda

3 Replies
1461 Views
Last post December 23, 2024, 1408 UTC
by ChrisSmolinski
1 Replies
1796 Views
Last post March 11, 2022, 0401 UTC
by WA4FHY
4 Replies
1580 Views
Last post April 04, 2023, 2334 UTC
by ~SIGINT~
2 Replies
1715 Views
Last post April 09, 2018, 0229 UTC
by Strange Beacons
1 Replies
1454 Views
Last post October 09, 2018, 2128 UTC
by shadypyro

 

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