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
2 Replies
2628 Views
Last post January 20, 2025, 0502 UTC
by wilddog
7 Replies
3980 Views
Last post July 24, 2019, 1539 UTC
by Looking-Glass
2 Replies
2339 Views
Last post June 17, 2021, 1007 UTC
by wondrmouse
2 Replies
2320 Views
Last post June 20, 2019, 2056 UTC
by Wooden_shoe_pirate
Antenna Identification

Started by WrongwayCorrigan

3 Replies
4310 Views
Last post June 06, 2011, 0335 UTC
by cmradio
4 Replies
7841 Views
Last post November 15, 2010, 0425 UTC
by WrongwayCorrigan
2 Replies
2267 Views
Last post August 26, 2019, 1845 UTC
by Josh
11 Replies
3855 Views
Last post November 05, 2019, 1941 UTC
by WWBR
Suggestions?

Started by X-UN-Spy « 1 2 »

21 Replies
11694 Views
Last post October 18, 2013, 2208 UTC
by Nella F.
13 Replies
16704 Views
Last post May 07, 2013, 1325 UTC
by XEROX
FT-243 Xtals

Started by XEROX

2 Replies
3737 Views
Last post March 13, 2013, 2348 UTC
by XEROX
5 Replies
6934 Views
Last post August 17, 2019, 1622 UTC
by ThElectriCat
Antennas

Started by zackers

10 Replies
7368 Views
Last post April 28, 2013, 0149 UTC
by skeezix
7 Replies
7655 Views
Last post April 24, 2015, 1052 UTC
by ChrisSmolinski
0 Replies
258 Views
Last post November 05, 2025, 2245 UTC
by Zazzle
2 Replies
4673 Views
Last post August 04, 2015, 1335 UTC
by radiogaga
1 Replies
6116 Views
Last post June 06, 2010, 1830 UTC
by Beerus Maximus
13 Replies
16343 Views
Last post July 22, 2015, 0311 UTC
by Zoidberg
4 Replies
14760 Views
Last post May 27, 2010, 2055 UTC
by W7LPN
4 Replies
4592 Views
Last post December 31, 2019, 0115 UTC
by Dude111

 

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