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
8 Replies
4364 Views
Last post June 03, 2018, 1210 UTC
by [tRMZ]
6 Replies
2831 Views
Last post January 30, 2021, 1610 UTC
by chanito
0 Replies
6652 Views
Last post November 13, 2009, 0544 UTC
by Zoidberg
13 Replies
16529 Views
Last post July 22, 2015, 0311 UTC
by Zoidberg
1 Replies
6189 Views
Last post June 06, 2010, 1830 UTC
by Beerus Maximus
3 Replies
3982 Views
Last post August 12, 2015, 1345 UTC
by redhat
4 Replies
14885 Views
Last post May 27, 2010, 2055 UTC
by W7LPN
4 Replies
4647 Views
Last post December 31, 2019, 0115 UTC
by Dude111
2 Replies
4765 Views
Last post August 04, 2015, 1335 UTC
by radiogaga
0 Replies
647 Views
Last post November 05, 2025, 2245 UTC
by Zazzle
7 Replies
7735 Views
Last post April 24, 2015, 1052 UTC
by ChrisSmolinski
Antennas

Started by zackers

10 Replies
7430 Views
Last post April 28, 2013, 0149 UTC
by skeezix
5 Replies
7019 Views
Last post August 17, 2019, 1622 UTC
by ThElectriCat
FT-243 Xtals

Started by XEROX

2 Replies
3786 Views
Last post March 13, 2013, 2348 UTC
by XEROX
13 Replies
16815 Views
Last post May 07, 2013, 1325 UTC
by XEROX
Suggestions?

Started by X-UN-Spy « 1 2 »

21 Replies
11784 Views
Last post October 18, 2013, 2208 UTC
by Nella F.
11 Replies
4003 Views
Last post November 05, 2019, 1941 UTC
by WWBR
2 Replies
2325 Views
Last post August 26, 2019, 1845 UTC
by Josh
4 Replies
7935 Views
Last post November 15, 2010, 0425 UTC
by WrongwayCorrigan
Antenna Identification

Started by WrongwayCorrigan

3 Replies
4355 Views
Last post June 06, 2011, 0335 UTC
by cmradio

 

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