Date   

Re: Mystery Signal on 20-Meters

Marco Steiner
 

Hi Allan,

 

this ist he view here in South-Germany!

 

 

Marco

 

Von: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> Im Auftrag von Allan Isaacs
Gesendet: Dienstag, 1. Dezember 2020 11:09
An: main@SDR-Radio.groups.io
Betreff: Re: [SDR-Radio] Mystery Signal on 20-Meters

 

Thanks for the information Marco.

Maybe you can verify the signals on the attached picture (not 20m but nearer 20KHz)?

I think one is JXN on 16.4KHz, but the others are possibly solar panel radiation around 16KHz and the comb of 100Hz spikes might be a Siemens Gigaset C430A, but I am only guessing at these.

Allan G3PIY


From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Marco Steiner
Sent: 01 December 2020 09:22
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Mystery Signal on 20-Meters

 

It‘s STANAG PBB Ny DenHelder Netherlands

Freundliche Grüße / Best regards

 

Marco Steiner




Attachments:


Re: Mystery Signal on 20-Meters

Allan Isaacs
 

Thanks for the information Marco.

Maybe you can verify the signals on the attached picture (not 20m but nearer 20KHz)?

I think one is JXN on 16.4KHz, but the others are possibly solar panel radiation around 16KHz and the comb of 100Hz spikes might be a Siemens Gigaset C430A, but I am only guessing at these.

Allan G3PIY


From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Marco Steiner
Sent: 01 December 2020 09:22
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Mystery Signal on 20-Meters

 

It‘s STANAG PBB Ny DenHelder Netherlands

Freundliche Grüße / Best regards

 

Marco Steiner




Re: Sat tracking basics ?

Alan
 

I assume you're not an Airspy customer ;)
;) ; ) ; ) ; ) ; ) ; ) ; ) ; ) ; ) ; ) ; ) ; ) ; ) ; ) ;)

But he has his good days (occasionally)

73 Alan G4ZFQ


Re: Mystery Signal on 20-Meters

Marco Steiner
 

It‘s STANAG PBB Ny DenHelder Netherlands

Freundliche Grüße / Best regards

Marco Steiner

Am 01.12.2020 um 10:18 schrieb Allan Isaacs <allan@...>:



I spotted this just under 40m. It sounds like a jammer with those vertical lines measuring 80Hz apart and covering a little under 1.5KHz bandwidth so presumably aimed at one specific broadcast?

Maybe that signal on 20m is merely a jammer having a different design and parked on 20m to give the owners plenty of feedback on its coverage?

Allan G3PIY

 

Attachments:


Re: Mystery Signal on 20-Meters

Allan Isaacs
 

I spotted this just under 40m. It sounds like a jammer with those vertical lines measuring 80Hz apart and covering a little under 1.5KHz bandwidth so presumably aimed at one specific broadcast?

Maybe that signal on 20m is merely a jammer having a different design and parked on 20m to give the owners plenty of feedback on its coverage?

Allan G3PIY

 


Re: Mystery Signal on 20-Meters

Sean - G4UCJ
 

Not sure if anyone gave an answer about this mystery signal, to me it looks like OTHR (Over The Horizon Radar), powerful radars used for detecting long range threats, on that are beyond the 'normal' radio horizon (such as Intercontinental missiles, etc.) or I think some may be used in weather research. They use separate RX and TX sites. They pop up all over the place, usually around the MUF. I read somewhere that you can have a good guess at the origin by looking at the pattern of the OTHR signal and noting the pulse rate. Typically they are 20kHz wide, but some are wider. There is a fair bit of info online (how accurate it is I wouldn't know, but it's a start).

I also read that transmitting on top of it is a way to make it go away as it is supposed to be able to identify if a QRG is occupied and move if it is - I can't vouch for the validity of that though!

73, Sean - G4UCJ


Re: Sat tracking basics ?

Simon Brown
 

Save a lot of time for me!

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ray Lyford
Sent: 01 December 2020 03:39
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Sat tracking basics ?

 

I find it odd that people needing help always manage to find the SDRConsole Website. They always find the forum and read how to use that.  They never read any part that tell them very clearly to send a screenshot. I like the way Simon handles it. It saves a lot of time for everyone.

 

 

 

Ray


--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: Sat tracking basics ?

Ray Lyford
 

I find it odd that people needing help always manage to find the SDRConsole Website. They always find the forum and read how to use that.  They never read any part that tell them very clearly to send a screenshot. I like the way Simon handles it. It saves a lot of time for everyone.



Ray


From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Bob Dengler <no6b@...>
Sent: 30 November 2020 23:02
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: Re: [SDR-Radio] Sat tracking basics ?
 
At 11/29/2020 05:00 PM, you wrote:
>and I did so, only to be subject of your increasing intolerance to those asking questions and your incessant demand for 'screen shots".

>A key element of customer service is not "scolding" people like a baby .

I assume you're not an Airspy customer ;)







Re: A PSA for you fellow SDR users!

Mark Cayton <oldjackbob@...>
 

On Fri, Nov 27, 2020 at 05:31 AM, Kriss Kliegle KA1GJU wrote:
It's the most wonderful time...

of the year!

Now how many more do I need? 🤔

Black Friday 2020
Thanks Kriss, I just sprung for a new HF+ Discovery for $118, couldn't pass that up!
 
--
Mark  K1LSB


Re: Mystery Signal on 20-Meters

Kriss Kliegle KA1GJU
 

I have images from SDRC V1.5, yes... V1.5! LOL

Here's my posts on 'discovering' this signal from April, 2018:

https://www.hfunderground.com/board/index.php/topic,41849.msg154757.html#msg154757





73 Kriss KA1GJU


Re: software for Sdr receiver

KF5JMD
 

This blog site says that it is not Upconverted on the 100Khz to 30Mhz output but rather it uses Direct Sampling.  If that's true then you need to follow instructions as if you were setting up a RTL-SDR Blog V3 dongle in the SDR Software.   http://blog.marxy.org/2017/04/rtl-sdr-direct-sampling-on-linux.html


Re: software for Sdr receiver

KF5JMD
 

This is just a different looking version of the RTL-SDR / cheap upconverter Combo that they used to sell on eBay for $39 or something like that.  You would just need to install the proper drivers for a RTL-SDR Dongle, (Zadig?) and then reboot, and then go into the SDR Software and config it properly.  The 100kHz to 30Mhz output is the "upconverted" output.  You need to set the offset in the software, not sure if this one is 100Mhz or much lower, the oldest version of this product the upconverter was like 40Mhz or something.   The other output (to 1.7GHZ or whatever) is treated in the software just like any other RTL Dongle without direct sampling, 24Mhz to 1.7Ghz without any offsets for upconversion (because there is none).   Pictured below is the older version of this product that many people should already be familiar with. Picture 3 of 5


Re: software for Sdr receiver

Scott <scotthntr02@...>
 

RTL2832U+R820T2 got it on ebay 


Mystery Signal on 20-Meters

Jim W7EED
 

Hello all,

I am seeing this odd signal near the high end of 20-meters quite often.  Does anyone have a clue as to what it might be?  Sometimes it's wider, sometimes it's narrower but it always has the
same look to it.  It will abruptly stop after a few minutes then start up again.

Really curious!


Re: Sat tracking basics ?

Bob Dengler
 

At 11/29/2020 05:00 PM, you wrote:
and I did so, only to be subject of your increasing intolerance to those asking questions and your incessant demand for 'screen shots".
A key element of customer service is not "scolding" people like a baby .
I assume you're not an Airspy customer ;)


Re: software for Sdr receiver

Scott <scotthntr02@...>
 

RTL2832U +R820T2.  this is what it says on ebay where i got it from .


Re: software for Sdr receiver

Simon Brown
 

Scott,

 

Treat it like this: https://www.sdr-radio.com/rtl-dongles

 

As they say, Zadig.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Stu C
Sent: 30 November 2020 21:38
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] software for Sdr receiver

 

Normally just RTL dongles on a sub PCB to break out the direct sampling.
Treat it like an RTL - as mentioned before Zadig etc.
Stu


--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: software for Sdr receiver

Stu C <stu@...>
 

Normally just RTL dongles on a sub PCB to break out the direct sampling.
Treat it like an RTL - as mentioned before Zadig etc.
Stu


Re: software for Sdr receiver

N8CVW
 

SUR (oops 😁)

On Nov 30, 2020, at 4:32 PM, n8cvw.gbmi <n8cvw.gbmi@...> wrote:



aliexpress 

pic shows sdr#

and there’s a link to http://gqrx.dk/download 

it might be a SUD (software undefined radio)








<image0.png>


On Nov 30, 2020, at 4:19 PM, Scott <scotthntr02@...> wrote:

it comes with the little mag mount 

Attachments:


Re: software for Sdr receiver

N8CVW
 


aliexpress 

pic shows sdr#

and there’s a link to http://gqrx.dk/download 

it might be a SUD (software undefined radio)










On Nov 30, 2020, at 4:19 PM, Scott <scotthntr02@...> wrote:

it comes with the little mag mount 

Attachments:

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