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
5 Replies
3792 Views
Last post December 25, 2020, 2046 UTC
by cj468
5 Replies
3518 Views
Last post March 30, 2021, 1236 UTC
by raypfaff
4 Replies
2569 Views
Last post November 02, 2021, 1803 UTC
by Elf36
4 Replies
3933 Views
Last post January 30, 2020, 1336 UTC
by R4002
4 Replies
3882 Views
Last post September 04, 2019, 1724 UTC
by Josh
4 Replies
3648 Views
Last post March 20, 2018, 2041 UTC
by Josh
4 Replies
4703 Views
Last post July 14, 2019, 0315 UTC
by shadypyro
4 Replies
3141 Views
Last post December 29, 2019, 1835 UTC
by SV1XV
3 Replies
2083 Views
Last post October 12, 2022, 2232 UTC
by R4002
3 Replies
2592 Views
Last post February 09, 2021, 0913 UTC
by cj468
3 Replies
2487 Views
Last post February 20, 2020, 1939 UTC
by Josh
3 Replies
6977 Views
Last post December 26, 2013, 1827 UTC
by Dr. Amp
3 Replies
1498 Views
Last post December 14, 2023, 1517 UTC
by R4002
3 Replies
2173 Views
Last post January 01, 2023, 1402 UTC
by Davep
Aircraft listening tips

Started by Elf36

3 Replies
2407 Views
Last post November 03, 2021, 1122 UTC
by Elf36
3 Replies
3242 Views
Last post August 19, 2025, 0127 UTC
by Shortwave_Listener
162 Mhz NWR distance

Started by Elf36

3 Replies
2377 Views
Last post November 02, 2021, 1408 UTC
by RobRich
3 Replies
2452 Views
Last post February 10, 2019, 1642 UTC
by ChrisSmolinski
3 Replies
3284 Views
Last post June 10, 2017, 1751 UTC
by Josh
3 Replies
3418 Views
Last post June 09, 2017, 1617 UTC
by Josh

 

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