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
S06 6792 USB

Started by kalvados

1 Replies
4283 Views
Last post January 21, 2018, 1058 UTC
by kalvados
2 Replies
4315 Views
Last post December 27, 2009, 1553 UTC
by Sealord
Possible Asian number sation 4651 kHz

Started by 07code04stalker1776

4 Replies
4318 Views
Last post February 01, 2014, 2112 UTC
by Token
0 Replies
4355 Views
Last post January 04, 2009, 1604 UTC
by desmoface
9 Replies
4407 Views
Last post March 17, 2013, 1403 UTC
by oldtimer
0 Replies
4416 Views
Last post December 28, 2008, 2102 UTC
by desmoface
M08a

Started by Ary-B « 1 2 »

15 Replies
4438 Views
Last post February 27, 2019, 1519 UTC
by sat_dxer
2 Replies
4438 Views
Last post February 13, 2010, 0327 UTC
by Sealord
V13 2014/02/07 08:00, 9522k

Started by totoCZ

12 Replies
4439 Views
Last post February 24, 2014, 0636 UTC
by Ary-B
22 Replies
4439 Views
Last post February 29, 2024, 1841 UTC
by kris
0 Replies
4448 Views
Last post April 18, 2014, 0410 UTC
by SW Observer
3 Replies
4467 Views
Last post December 17, 2009, 0120 UTC
by Sealord
0 Replies
4475 Views
Last post May 08, 2008, 2244 UTC
by mapleleaf
7 Replies
4485 Views
Last post February 26, 2025, 2322 UTC
by kris
8 Replies
4506 Views
Last post June 21, 2013, 1504 UTC
by Strange Beacons
3 Replies
4507 Views
Last post February 03, 2019, 1240 UTC
by sat_dxer
QSL?

Started by Tim537

8 Replies
4508 Views
Last post August 03, 2013, 1635 UTC
by sat_dxer
5 Replies
4513 Views
Last post March 24, 2016, 1520 UTC
by sat_dxer
12 Replies
4517 Views
Last post May 21, 2019, 2107 UTC
by dollydot
0 Replies
4539 Views
Last post December 01, 2008, 1634 UTC
by Zoidberg

 

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