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
2727 Views
Last post October 21, 2012, 1919 UTC
by Jolly Roger
5 Replies
2726 Views
Last post May 16, 2017, 1410 UTC
by redhat
4 Replies
2721 Views
Last post June 08, 2017, 0836 UTC
by Looking-Glass
5 Replies
2717 Views
Last post September 04, 2014, 2037 UTC
by jFarley
1 Replies
2698 Views
Last post July 29, 2017, 2010 UTC
by Gino Italy
Titus II DRM

Started by Oliver

5 Replies
2688 Views
Last post September 20, 2021, 1850 UTC
by ThaDood
4 Replies
2687 Views
Last post December 31, 2016, 0503 UTC
by Looking-Glass
2 Replies
2684 Views
Last post December 07, 2013, 1954 UTC
by ihmeyers
24 Replies
2682 Views
Last post April 19, 2023, 2014 UTC
by alpard
ICOM ATT issue

Started by Matt285

12 Replies
2670 Views
Last post October 15, 2019, 1959 UTC
by Josh
17 Replies
2670 Views
Last post December 18, 2019, 0221 UTC
by chanito
1 Replies
2654 Views
Last post December 02, 2011, 1945 UTC
by Pigmeat
Touching MFJ-956 increases gain.

Started by bandarr3000

10 Replies
2654 Views
Last post April 27, 2018, 1828 UTC
by ka1iic
1 Replies
2620 Views
Last post August 23, 2019, 1519 UTC
by dxace1
3 Replies
2617 Views
Last post March 16, 2012, 1529 UTC
by S. McArdle
Tesla R4

Started by Gino Italy

3 Replies
2615 Views
Last post December 07, 2018, 2244 UTC
by Gino Italy
2 Replies
2609 Views
Last post October 02, 2015, 1341 UTC
by VK3BVW
5 Replies
2609 Views
Last post September 22, 2018, 1918 UTC
by Josh
4 Replies
2597 Views
Last post April 14, 2014, 0349 UTC
by Zoidberg
5 Replies
2595 Views
Last post June 27, 2013, 2121 UTC
by jFarley

 

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