16
Weather / Good and cheap wx station?
« on: January 10, 2022, 2005 UTC »
Emphasis on cheap. What wx gizmos do you use? Any cheap and reliable sets out there?
Shortwave Pirate Radio In North America And Around The World, And Other Signals That Go Bump In The Night
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.
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17
SDR - Software Defined Radio / Eavesdropping on LTE Calls with a USRP Software Defined Radio
« on: August 20, 2020, 1822 UTC »
It turns out that many LTE carriers reuse the same keystream when two calls are made within a single radio connection. An attacker can then record an encrypted conversation, then immediately call the victim after that conversation. The attacker can now access the encrypted keystream, and as the keystream is identical to the first conversation, the first conversation can now be decoded.
https://www.rtl-sdr.com/eavesdropping-on-lte-calls-with-a-usrp-software-defined-radio/
https://www.rtl-sdr.com/eavesdropping-on-lte-calls-with-a-usrp-software-defined-radio/
18
Shortwave Broadcast / WBCQ 5130 AM 2340Z 19 APR 20
« on: April 19, 2020, 2344 UTC »
Dragnet theme, s1 to s3 or so in the clear with some distant tstorm activity
19
MW Loggings / 1040 AM
« on: April 11, 2020, 2106 UTC »
Oft have been the times, usually at greyline, when hip hop/rap blared out from the glorious Buick speakers as I rolled (and I assure you they see me rolling, they hatin) along, expecting to hear nothing but powerhouse WHO on 1040, not rap. I finally got around to finding out where the wrap music came from and apparently a fm sta has an am component, an am hip hop/wrap music format. In Colorado.
https://www.facebook.com/pages/category/Radio-Station/1040AM-KCBR-265582224176380/
https://syndicateempireradio.com/
yo dog
https://www.youtube.com/watch?v=lOfZLb33uCg
we doin it fo the amlets yo
https://www.facebook.com/pages/category/Radio-Station/1040AM-KCBR-265582224176380/
https://syndicateempireradio.com/
yo dog
https://www.youtube.com/watch?v=lOfZLb33uCg
we doin it fo the amlets yo
20
General Radio Discussion / Short But In Depth TDoA Analysis
« on: April 10, 2020, 2012 UTC »
HF TDoA multilateration (1)
This blog post contains an analysis of TDoA multilateration applied to signal on 13413.4 kHz using a number of KiwiSDRs located in Europe.
For now the assumption used for making the KiwiSDR TDoA maps is that signals propagate with speed of light along the ground. Here we compare the measured delay differences with the ones obtained from this assumption.
All plots shown in this blog post are generated using octave/matlab .mat files available when using the updated KiwiSDR TDoA algorithm.
The cross-correlations for all combinations of used KiwiSDRs, normalized to have their maximum at unity, are shown below.
https://hcab14.blogspot.com/2020/04/hf-tdoa-multilateration-1.html
This blog post contains an analysis of TDoA multilateration applied to signal on 13413.4 kHz using a number of KiwiSDRs located in Europe.
For now the assumption used for making the KiwiSDR TDoA maps is that signals propagate with speed of light along the ground. Here we compare the measured delay differences with the ones obtained from this assumption.
All plots shown in this blog post are generated using octave/matlab .mat files available when using the updated KiwiSDR TDoA algorithm.
The cross-correlations for all combinations of used KiwiSDRs, normalized to have their maximum at unity, are shown below.
https://hcab14.blogspot.com/2020/04/hf-tdoa-multilateration-1.html
21
Utility / FEMA ALE Net and SHARES HF-SSB Frequencies
« on: April 01, 2020, 0018 UTC »
FEMA All USB ALE
4030, 6995, 9837, 10358, 10928, 12129, 12216, 13935, 14871, 16314, 19969, 22983
SHARES HF-SSB Frequencies
4458 kHz USB - SHARES Region 4 SHARES Northeast Region Hurricane Net heard here
4490 kHz USB - MARS frequency
4618 kHz USB
4636 kHz USB - Civil Air Patrol CAP Net 1 Regional Primary (shared frequency)
5063.5 kHz USB
5167.5 kHz USB - Alaska Emergency Frequency (see: SECURE)
5429 kHz USB
5711 kHz USB
5760 kHz USB
6765 kHz USB - SHARES North Primary
6800 kHz USB
6845 kHz USB - SHARES Northeast SHARES Region 4
6910 kHz USB - SHARES Central SHARES Region 6
6912 kHz USB - SHARES Central alternate frequency (primary 6910 USB)
6915 kHz USB - SHARES Central alternate frequency (primary 6910 USB)
7391 kHz USB
7403.5 kHz USB
7615 kHz USB - Civil Air Patrol / CAP use as well
7642 kHz USB
7792 kHz USB
7791 kHz USB
7991 kHz USB
9057 kHz USB
9064 kHz USB
9106 kHz USB
11108 kHz USB
11217 kHz USB
13242 kHz USB
13426.5 kHz USB
14396.5 kHz USB - Daytime FEMA use, SHARES admin net
14402 kHz USB - SHARES West/SHARES daytime frequency
14928.5 kHz USB
15094 kHz USB
17458 kHz USB
17487 kHz USB
20107 kHz USB
25354 kHz USB - Civil Air Patrol / CAP use - 25.354 MHz
26617 kHz USB - Civil Air Patrol / CAP use - 26.617 MHz
26620 kHz USB - Civil Air Patrol / CAP use - old CAP local "talkaround" frequency 26.620 MHz AM
26812 kHz USB - often local use only 26.812 MHz
27546 kHz USB - often local use only - also used by CAP 27.546 MHz
29894 kHz USB - often local use only - also used by CAP 29.894 MHz
4030, 6995, 9837, 10358, 10928, 12129, 12216, 13935, 14871, 16314, 19969, 22983
SHARES HF-SSB Frequencies
4458 kHz USB - SHARES Region 4 SHARES Northeast Region Hurricane Net heard here
4490 kHz USB - MARS frequency
4618 kHz USB
4636 kHz USB - Civil Air Patrol CAP Net 1 Regional Primary (shared frequency)
5063.5 kHz USB
5167.5 kHz USB - Alaska Emergency Frequency (see: SECURE)
5429 kHz USB
5711 kHz USB
5760 kHz USB
6765 kHz USB - SHARES North Primary
6800 kHz USB
6845 kHz USB - SHARES Northeast SHARES Region 4
6910 kHz USB - SHARES Central SHARES Region 6
6912 kHz USB - SHARES Central alternate frequency (primary 6910 USB)
6915 kHz USB - SHARES Central alternate frequency (primary 6910 USB)
7391 kHz USB
7403.5 kHz USB
7615 kHz USB - Civil Air Patrol / CAP use as well
7642 kHz USB
7792 kHz USB
7791 kHz USB
7991 kHz USB
9057 kHz USB
9064 kHz USB
9106 kHz USB
11108 kHz USB
11217 kHz USB
13242 kHz USB
13426.5 kHz USB
14396.5 kHz USB - Daytime FEMA use, SHARES admin net
14402 kHz USB - SHARES West/SHARES daytime frequency
14928.5 kHz USB
15094 kHz USB
17458 kHz USB
17487 kHz USB
20107 kHz USB
25354 kHz USB - Civil Air Patrol / CAP use - 25.354 MHz
26617 kHz USB - Civil Air Patrol / CAP use - 26.617 MHz
26620 kHz USB - Civil Air Patrol / CAP use - old CAP local "talkaround" frequency 26.620 MHz AM
26812 kHz USB - often local use only 26.812 MHz
27546 kHz USB - often local use only - also used by CAP 27.546 MHz
29894 kHz USB - often local use only - also used by CAP 29.894 MHz
22
Amateur Radio / On the HAM bands
« on: March 20, 2020, 2251 UTC »
Started on 20m and clean band with a few strong sigs and some south American dx with a lot of strong sigs coming from the western US. Moved to 17m and there were several dx stas, one from Caracas, then on to 15m. 15m had a lot of band noise for some reason, noise absent from the other bands, and there was dx under that noise, infuriatingly. Next tried 10m and a wp4 sta is calling cq on 28412 at 2250Z.
23
Equipment / NEMP Rated surge arrestor
« on: February 23, 2020, 0142 UTC »
IS-50NX-C1
SKU: IS-50NX-C1
$19.95
https://fairradio.com/product/is-50nx-c1/
I feel this is an excellent price for the amount of protection.
Keep in mind they ground the antenna side center conductor with an inductance while a cap isolates the rig side center conductor and a gas discharge pill protects the works.
SKU: IS-50NX-C1
$19.95
https://fairradio.com/product/is-50nx-c1/
I feel this is an excellent price for the amount of protection.
Keep in mind they ground the antenna side center conductor with an inductance while a cap isolates the rig side center conductor and a gas discharge pill protects the works.
24
Shortwave Broadcast / Radio Verdad 4055KHz
« on: February 23, 2020, 0119 UTC »
Radio Verdad 4055KHz making usual appearance in the pirate radio band. Om in espanolio giving phone numbers and other commentary, s7 and into music background 0118Z 22FEB20
25
Software / Automated sig id
« on: February 06, 2020, 2232 UTC »
Shazam Style Automatic Signal Identification via the Sigidwiki Database
Thank you to José Carlos Rueda for submitting news about his work on converting a "Shazam"-like Python program made originally for song identification into a program that can be used to automatically identify radio signals based on their demodulated audio sounds. Shazam is a popular app for smartphones that can pull up the name of any song playing within seconds via the microphone. It works by using audio fingerprinting algorithms and a database of stored song fingerprints.
Using similar algorithm to Shazam, programmer Joseph Balikuddembe created an open source program called "audio_recogition_system" [sic] which was designed for creating your own audio fingerprint databases out of any mp3 files.
José then had the clever idea to take the database of signal sounds from sigidwiki.com, and create an identification database of signal sounds for audio_recogition_system. He writes that from his database the program can now identify up to 350 known signals from the sigidwiki database. His page contains the installation instructions and a link to download his premade database. The software can identify via audio that is input from the PC microphone/virtual audio cable or from a file.
https://www.rtl-sdr.com/shazam-style-automatic-signal-identification-via-the-sigidwiki-database/
Thank you to José Carlos Rueda for submitting news about his work on converting a "Shazam"-like Python program made originally for song identification into a program that can be used to automatically identify radio signals based on their demodulated audio sounds. Shazam is a popular app for smartphones that can pull up the name of any song playing within seconds via the microphone. It works by using audio fingerprinting algorithms and a database of stored song fingerprints.
Using similar algorithm to Shazam, programmer Joseph Balikuddembe created an open source program called "audio_recogition_system" [sic] which was designed for creating your own audio fingerprint databases out of any mp3 files.
José then had the clever idea to take the database of signal sounds from sigidwiki.com, and create an identification database of signal sounds for audio_recogition_system. He writes that from his database the program can now identify up to 350 known signals from the sigidwiki database. His page contains the installation instructions and a link to download his premade database. The software can identify via audio that is input from the PC microphone/virtual audio cable or from a file.
https://www.rtl-sdr.com/shazam-style-automatic-signal-identification-via-the-sigidwiki-database/
26
Utility / 10430 BFSK
« on: January 11, 2020, 1941 UTC »
10430cf BFSK 75Bd 850 Shift 1938Z 11JAN19
Presumed KG84 or other crypto in use as acf is 0, just bouncing the smeter
Presumed KG84 or other crypto in use as acf is 0, just bouncing the smeter
27
Shortwave Broadcast / 15000 AM 1920Z 28DEC19 WWV
« on: December 28, 2019, 1922 UTC »
15000 AM 1920Z 28DEC19 WWV
Time signal by om in English with WWVH yl clearly in background
S3/5 and rig's a fraction of a cycle off
Time signal by om in English with WWVH yl clearly in background
S3/5 and rig's a fraction of a cycle off
28
Shortwave Broadcast / 15140 1914Z 28DEC19 Radio Habana CubaArabic
« on: December 28, 2019, 1918 UTC »
15140 1914Z 28DEC19
Radio Habana Cuba
Programmed Arabic at this time but def not arabic, more like Portuguese or slavic by om.
S6 steady in the clear.
Radio Habana Cuba
Programmed Arabic at this time but def not arabic, more like Portuguese or slavic by om.
S6 steady in the clear.
29
Shortwave Broadcast / 15580 1910Z 28DEC19 Voice of America
« on: December 28, 2019, 1914 UTC »
15580 1910Z 28DEC19
Voice of America 1
Om in English with pop tracks
S0 to fadeouts on clear channel.
Voice of America 1
Om in English with pop tracks
S0 to fadeouts on clear channel.
30
Shortwave Broadcast / 15610 AM 1907Z 28DEC19EWTN (WEWN) English
« on: December 28, 2019, 1911 UTC »
15610 AM 1907Z 28DEC19
EWTN (WEWN)
Om & yl in English chat, S0 to complete fadeouts and persistent codar cochannel bs.
EWTN (WEWN)
Om & yl in English chat, S0 to complete fadeouts and persistent codar cochannel bs.
