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.


No New Posts North American Shortwave Pirate

Loggings of North American Pirate Stations

Moderators: Beerus Maximus, Zane, Sealord, Kilokat7, Ray Lalleu, DimBulb, refmo, clobdell, Skipmuck, PirateSWL

188092 Posts
31841 Topics

Last post by radioguy73
in Re: "Fake Radio Canada I...
on Today at 05:48

Child Boards: Broadcast Announcements
No New Posts European Pirates and Private Stations

Loggings of Europirates as well as the licensed low power / hobby European shortwave broadcast stations

Moderators: Beerus Maximus, Ray Lalleu, DimBulb, clobdell, Skipmuck, Shortwave_Listener

68910 Posts
35425 Topics

Last post by N2MLP
in Re: Indy Radio 6931 AM ...
on Today at 00:53

No New Posts Latin American Pirate

Loggings of pirate radio stations from Central and South America

Moderators: Ray Lalleu, Skipmuck

2403 Posts
1148 Topics

Last post by dxace1
in Re: UNID 6934.9 AM 2335 ...
on February 28, 2024, 0007 UTC

No New Posts North American MW Pirate Radio

North American AM/MW Free Radio Station Loggings

Moderators: Ray Lalleu, Skipmuck, Shortwave_Listener

1816 Posts
654 Topics

Last post by ChrisSmolinski
in UNID 1725 AM 2245 UTC 29...
on March 01, 2024, 1238 UTC

No New Posts European MW Pirate Radio

European AM/MW Free Radio Station Loggings

Moderators: Ray Lalleu, Skipmuck, Shortwave_Listener

2590 Posts
2110 Topics

Last post by n2avh
in Re: UNID (SR) 1715 AM 21...
on February 28, 2024, 2206 UTC

No New Posts FM Free Radio

FM Free Radio Station Loggings

454 Posts
119 Topics

Last post by ROKFRED
in Re: What happened to 107...
on July 03, 2023, 1629 UTC

No New Posts HF Beacons

Loggings of the various unlicensed shortwave beacon stations

Moderators: Token, Kilokat7, Teotwaki

9382 Posts
1345 Topics

Last post by mark-n-nut
in Re: S
on February 28, 2024, 1710 UTC

No New Posts Fishing Drift Net Beacons

CW Beacons used to identify and locate drift nets used by fishermen

341 Posts
80 Topics

Last post by Looking-Glass
in Re: DNB logs for Februar...
on February 17, 2024, 1105 UTC

No New Posts 22 Meter Band HiFER Beacons

Loggings of HiFER Part 15 Beacons

Moderator: tesla

1219 Posts
351 Topics

Last post by HQ180
in Re: VUDU
on February 29, 2024, 0326 UTC

No New Posts Spy Numbers

Loggings of Spy Numbers Stations

Moderator: Token

4990 Posts
1628 Topics

Last post by kris
in E07 schedule Mar 01 M...
on March 01, 2024, 2356 UTC

No New Posts Shortwave Broadcast

Loggings of SWBC Stations

Moderators: skeezix, Ray Lalleu, Skipmuck

13886 Posts
7614 Topics

Last post by n2avh
in Re: UnID 4850 Central As...
on March 01, 2024, 1732 UTC

No New Posts Clandestine Stations

Worldwide Loggings of and information about Clandestine Stations

Moderator: fpeconsultant

1498 Posts
677 Topics

Last post by Ron - Calif.
in Korea - Voice of Freedom...
on February 29, 2024, 2349 UTC

No New Posts Longwave Loggings

Loggings of Longwave Stations

Moderators: skeezix, jFarley, Chanter

1776 Posts
380 Topics

Last post by NJQA
in Re: eLORAN Tests 1250 UT...
on February 11, 2024, 1414 UTC

No New Posts DGPS

DGPS related messages - loggings and software

Moderator: skeezix

5291 Posts
3870 Topics

Last post by skeezix
in DGPS Logs February 29 20...
on March 01, 2024, 1419 UTC

No New Posts MW Loggings

Loggings of MW Stations

Moderators: skeezix, Kilokat7

3431 Posts
1105 Topics

Last post by n2avh
in WJFV 1650 AM in Sweden 0...
on February 29, 2024, 0132 UTC

No New Posts Utility

Loggings of Utility Stations

Moderator: Beerus Maximus

6830 Posts
1998 Topics

Last post by ~SIGINT~
in Re: HFGCS General Log
on March 01, 2024, 1958 UTC

No New Posts WEFAX and SSTV

Loggings of WEFAX and non pirate SSTV transmissions. Images welcome!

Moderator: Skipmuck

436 Posts
168 Topics

Last post by fpeconsultant
in Re: GYA-Northwood UK 804...
on February 20, 2024, 2352 UTC

No New Posts 10/11 meters

Loggings of licensed and unlicensed stations on 10 and 11 meters

Moderators: thechoat, R4002

2826 Posts
1078 Topics

Last post by IrvingtonVFD43
in Re: 25900 kHz AM 25.900 ...
on March 01, 2024, 1813 UTC

No New Posts FM DX Loggings

Loggings of FM DX Stations

139 Posts
55 Topics

Last post by RobRich
in FM DX Propagation 31 JAN...
on February 01, 2024, 0022 UTC

No New Posts TV DX Loggings

Logs of TV DX stations - screencaps welcome

58 Posts
8 Topics

Last post by uhf35
in Re: TV DXing from the tr...
on February 26, 2024, 1724 UTC

No New Posts VHF/UHF Logs, including satellites and radiosondes

Post anything above 30 MHz, other than Ham, FM and TV, here

1559 Posts
224 Topics

Last post by R4002
in 33.400 MHz Russian Milit...
on February 23, 2024, 1349 UTC

No New Posts Other

Loggings of Other Stations

3901 Posts
1370 Topics

Last post by Mick Boyle
in UNID 690 AM Pittsburgh P...
on February 26, 2024, 1756 UTC

No New Posts Peskies

Fishermen? Drug runners? Or just folks with radios talking in an unlicensed fashion within unconventional bands? The HFU decides

Moderators: R4002, aquabat

1962 Posts
1252 Topics

Last post by HF DXER
in 10.542 USB at 02:18 UTC ...
on February 23, 2024, 0221 UTC

No New Posts HF Mystery Signals

Unidentified modes - Hearing a digital mode you need help identifying? This is the place

Moderator: Token

1238 Posts
290 Topics

Last post by Token
in MOVED: 6.220 Mhz CW Plea...
on February 29, 2024, 0801 UTC

No New Posts ID and Translation Requests

Got a station you can't ID, or need a translation? Post a link to a recording here

336 Posts
116 Topics

Last post by SWLhacker
in Re: UNID 1647 AM 1302...
on February 19, 2024, 1519 UTC

Technical Topics

No New Posts Equipment

Radios and Antenna Discussions

Moderator: corq

7332 Posts
925 Topics

Last post by dxace1
in Re: Radio Jay Allen chec...
on February 29, 2024, 0359 UTC

No New Posts Part 15 AM and FM Station Operation

Discussions related to legal Part 15 AM and FM station operation

313 Posts
60 Topics

Last post by ThaDood
on February 10, 2024, 1940 UTC

No New Posts Propagation

Much like the weather, everybody complains about propagation, but nobody does anything about it.

446 Posts
104 Topics

Last post by kris
in Solar flares 28 JAN 2024
on January 28, 2024, 2217 UTC

No New Posts SDR - Software Defined Radio

Software Defined Radio discussions

1517 Posts
296 Topics

Last post by ~SIGINT~
in Re: KiwiSDR 2 Now Availa...
on March 01, 2024, 1904 UTC

No New Posts The RF Workbench

RF construction projects

Moderator: ff

2552 Posts
275 Topics

Last post by Albert H
in Re: U-LULU (Updated LULU...
on February 21, 2024, 2232 UTC

No New Posts Software

Radio Related Software

669 Posts
203 Topics

Last post by ChrisSmolinski
in Black Cat ALE Vacuum Cle...
on February 21, 2024, 2200 UTC

General Category

No New Posts General Radio Discussion

Miscellaneous radio related topics.

16983 Posts
4277 Topics

Last post by ~SIGINT~
in Re: UTE Databases and Lo...
on February 29, 2024, 1537 UTC

No New Posts Amateur Radio

Amateur / Ham Radio related discussions

1075 Posts
228 Topics

Last post by ThaDood
in Re: AM Rally This weeken...
on February 05, 2024, 1939 UTC

No New Posts QSLs Received

Post pictures and other details of QSLs and eQSLs here

Moderators: Sealord, PirateSWL

12854 Posts
5065 Topics

Last post by Molvania Poacher
in Re: Musical Soundtrack R...
on Today at 06:13

No New Posts Pirate Radio History

A place to post historical articles and QSLs, links to audio files, etc.

Moderator: PirateSWL

196 Posts
43 Topics

Last post by Big Badfish Al
in Re: "Mexican Food" stati...
on August 21, 2023, 2052 UTC

No New Posts For Sale / Wanted / Barter

Radio related items for sale, or wanted, or trade/barter - clear out your old junk and get new junk!

445 Posts
131 Topics

Last post by ChrisSmolinski
in For sale - Vicor FlatPac...
on January 22, 2024, 1758 UTC

No New Posts Huh?

The DX is under g0pher's table

6541 Posts
1355 Topics

Last post by Traveling Wave
in Re: A look at a long-tim...
on February 27, 2024, 1828 UTC

No New Posts Group W Bench

Misfit posts

199 Posts
99 Topics

Last post by ChrisSmolinski
in Re: Thunderchicken Radio...
on September 30, 2023, 1305 UTC

No New Posts Weather

Everybody complains about the weather, but nobody does anything about it

192 Posts
45 Topics

Last post by ThaDood
in MLK, jr Week good for lo...
on January 11, 2024, 2131 UTC

No New Posts Bacon, BBQ, Beef, And More

Tasty LCHF/Paleo/Keto foods for the radio enthusiast

991 Posts
203 Topics

Last post by ChrisSmolinski
in Re: Oven Roasted Chicken...
on February 19, 2024, 1832 UTC

  • No New Posts
  • Redirect Board

HFU HF Underground - Info Center

Forum Stats Forum Stats

379170 Posts in 109041 Topics by 6320 Members. Latest Member: elbowgeek
Latest Post: "Re: Musical Soundtrack R..." ( Today at 06:13 )
View the most recent posts on the forum.
[More Stats]

Users Online Users Online

100 Guests, 1 User

Users active in past 15 minutes:

Most Online Today: 182. Most Online Ever: 3935 (April 02, 2020, 1625 UTC)

HFUnderground T-Shirt
HFUnderground Garden Flag
by MitchellTimeDesigns