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
0 Replies
15336 Views
Last post January 31, 2015, 0541 UTC
by Rich
0 Replies
2849 Views
Last post July 26, 2019, 1613 UTC
by Rob.
Outernet

Started by Satellite Guy

5 Replies
9830 Views
Last post January 12, 2015, 0121 UTC
by Satellite Guy
New here

Started by SBS01

1 Replies
1622 Views
Last post March 02, 2020, 0001 UTC
by Matt285
0 Replies
1140 Views
Last post December 24, 2020, 1548 UTC
by SBS01
38 Replies
8665 Views
Last post April 02, 2022, 0121 UTC
by sat_dxer
0 Replies
1354 Views
Last post February 08, 2019, 1958 UTC
by shadypyro
1 Replies
1467 Views
Last post January 19, 2019, 2307 UTC
by shadypyro
0 Replies
1374 Views
Last post January 07, 2019, 2355 UTC
by shadypyro
0 Replies
1383 Views
Last post December 28, 2018, 2239 UTC
by shadypyro
2 Replies
4232 Views
Last post June 25, 2018, 1813 UTC
by Josh
4 Replies
2840 Views
Last post March 20, 2018, 2041 UTC
by Josh
3 Replies
713 Views
Last post December 14, 2023, 1517 UTC
by R4002
0 Replies
1963 Views
Last post July 08, 2018, 0021 UTC
by skeezix
0 Replies
1716 Views
Last post July 02, 2018, 0007 UTC
by skeezix
0 Replies
11665 Views
Last post March 27, 2016, 1220 UTC
by SkyWalker
1 Replies
8368 Views
Last post October 14, 2015, 2320 UTC
by ChrisSmolinski
4 Replies
1714 Views
Last post December 29, 2019, 1835 UTC
by SV1XV
HNMS radiosondes

Started by SV1XV

13 Replies
4685 Views
Last post April 07, 2020, 1220 UTC
by SV1XV
5 Replies
2209 Views
Last post December 25, 2020, 2046 UTC
by cj468

 

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