Date   

Re: Interesting phenomena or has something changed?

Kriss Kliegle KA1GJU
 

Hello Paul,

The readings for WXEX, AM 1540 of Exeter, NH are as follows:
At the PCARC (KA1GJU @ PCARC server) site, S9+64dB  or  -10.1dBm via an SDR-iq with ONLY +12dB IF gain and 0 RF Gain (which approximates similar S-meter readings to my 'rice box' radios.
At my home QTH (Super Station #1) with similar antenna, S9+55   or -19.5 dBM and same gain settings as above. 
On my Super Station #2, with yet another similar antenna but has your AM BC filter installed, I get S9+37 or -36.7dBm

Both PCARC and my QTH are 5.2 and 5.1 miles respectively from the 5KW station. It seems on both SDR's (Airspy discovery and SDR-iq) at the PCARC site WXEX is very strong and numerous images of it appear throughout the upper bands. None of which are viewable/audible on my QTH servers.

I'm guessing there's some corrosion on the connections out there somewhere, as previously mentioned by N8CVW.

73 Kriss KA1GJU


Re: Interesting phenomena or has something changed?

Paul Cianciolo
 

Kriss

 

Simple way to find out of this is generated by the RX or external to the RX is to simple put a 10 dB pad in front of the RF.

A real 10db pad that is external to the radio.

If the signal is generated outside the RX all the images will drop by 10 dB, if they drop by more… problem is in the RX.

 

FCC says that spurious emissions need to be -80 to 84 dB down from the mail carrier. 

Looks like you might be in the very high signal area.   What is the S meter reading of the station.

 

I run into this problem quite often at work where a Ham lives close to a AM broadcast station, and sees the 2nd or third harmonic on 160 or 80 meters.

Going so far as to lodge a compliant with the FCC sometimes.

Consider a Large signal, such in my case 610 Khz 1 KW at 1.4 Miles, and a large antenna, I can see +70 db on the S meter.

Add to that -80 Dbc FCC spec from the station.. and that still leaves a legal S7 or so signal level.

 

I am not saying this is your case, I just add it for general information.

From the look of your spectrogram it appears you have something else going on there.

 

How strong is the 1540 Khz from WXEX?  Is it.. at your house.

 

Good luck with the RFI

 

PaulC

W1VLF

 

Check out my  Youtube Channel W1VLF

 

 

From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Kriss Kliegle KA1GJU
Sent: Friday, February 5, 2021 10:03 AM
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Interesting phenomena or has something changed?

 

Upon further searching, it's all over the 2Mhz band, strong and clear! 🤬



73 Kriss KA1GJU


Re: Interesting phenomena or has something changed?

Kriss Kliegle KA1GJU
 

Upon further searching, it's all over the 2Mhz band, strong and clear! 🤬



73 Kriss KA1GJU


Re: Interesting phenomena or has something changed?

Kriss Kliegle KA1GJU
 

Been so long since I installed that antenna setup, I don't remember if I used ring terminals (ugh) on the antenna feed point onto the stainless steel Unun connections or just wrapped the copper wire and tightened the nut. Same for the ground connection.
We have a VE test session there tomorrow, guess I better bring snow shoes, emery cloth, wrench and some Scotch 33+. If the WiFi will reach that far out into the woods, I can watch in real time to see where the issue is.

73 Kriss KA1GJU


Re: Interesting phenomena or has something changed?

Allan Isaacs
 

That brings back memories of the early 60s when we were operating G3OUL in the Students Union at Liverpool University.

We kept breaking through into the Tannoy system.

It turned out to be diode-like corrosion in the lead roof of the building if my memory serves me right.

Allan G3PIY

 


From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of N8CVW
Sent: 05 February 2021 13:47
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] Interesting phenomena or has something changed?

 

just a knee jerk advice ...

 

maybe listen with a low sensitivity wide band antenna, eg youloop, maybe short a whip, straight into the receiver, no preamp, nothing to IMD

 

to find out what actual signal is present 

 

from what (little) i know the culprit could be corrosion acting like a diode 

 

Paul

N8CVW



On Feb 5, 2021, at 8:36 AM, Kriss Kliegle KA1GJU <kliegle@...> wrote:

I've noticed in the last few weeks that my server (KA1GJU @ PCARC) is getting QRM from a nearby 5KW AM BC station on 1540 kHz 5.2mile (8.4km) miles away. This installation was relatively QRM free until recently. I've noticed this station creeping in all over the bands, and it's not just the Airspy, it's also on the SDR-iq. The antenna is an EFW of ~200' long, with a 9:1 unun, grounded at the unun and long length of 1/2" 75 ohm CATV hardline to shack.

Right now, at 1311z it's slowly fading in and out on 14230 kHz (9.24 harmonic of 1540kHz?). There is some SSTV under it giving false S-meter readings, but the waterfall shows the slow fades, images are ~ one minute apart. Slow QSO is normal for this time of day since the Sun rose up just over an hour ago.

 

Do you think the issue is on my end with something in the antenna/feedline or does the AM BC station have issues?
Open ground connection perhaps? I would have to trudge out in snow shoes to check the antenna, recent storm dumped on us few days ago.

73 Kriss KA1GJU

 


Re: Interesting phenomena or has something changed?

N8CVW
 

just a knee jerk advice ...

maybe listen with a low sensitivity wide band antenna, eg youloop, maybe short a whip, straight into the receiver, no preamp, nothing to IMD

to find out what actual signal is present 

from what (little) i know the culprit could be corrosion acting like a diode 

Paul
N8CVW

On Feb 5, 2021, at 8:36 AM, Kriss Kliegle KA1GJU <kliegle@...> wrote:

I've noticed in the last few weeks that my server (KA1GJU @ PCARC) is getting QRM from a nearby 5KW AM BC station on 1540 kHz 5.2mile (8.4km) miles away. This installation was relatively QRM free until recently. I've noticed this station creeping in all over the bands, and it's not just the Airspy, it's also on the SDR-iq. The antenna is an EFW of ~200' long, with a 9:1 unun, grounded at the unun and long length of 1/2" 75 ohm CATV hardline to shack.

Right now, at 1311z it's slowly fading in and out on 14230 kHz (9.24 harmonic of 1540kHz?). There is some SSTV under it giving false S-meter readings, but the waterfall shows the slow fades, images are ~ one minute apart. Slow QSO is normal for this time of day since the Sun rose up just over an hour ago.

 

Do you think the issue is on my end with something in the antenna/feedline or does the AM BC station have issues?
Open ground connection perhaps? I would have to trudge out in snow shoes to check the antenna, recent storm dumped on us few days ago.

73 Kriss KA1GJU

Attachments:


Interesting phenomena or has something changed?

Kriss Kliegle KA1GJU
 

I've noticed in the last few weeks that my server (KA1GJU @ PCARC) is getting QRM from a nearby 5KW AM BC station on 1540 kHz 5.2mile (8.4km) miles away. This installation was relatively QRM free until recently. I've noticed this station creeping in all over the bands, and it's not just the Airspy, it's also on the SDR-iq. The antenna is an EFW of ~200' long, with a 9:1 unun, grounded at the unun and long length of 1/2" 75 ohm CATV hardline to shack.

Right now, at 1311z it's slowly fading in and out on 14230 kHz (9.24 harmonic of 1540kHz?). There is some SSTV under it giving false S-meter readings, but the waterfall shows the slow fades, images are ~ one minute apart. Slow QSO is normal for this time of day since the Sun rose up just over an hour ago.

 

Do you think the issue is on my end with something in the antenna/feedline or does the AM BC station have issues?
Open ground connection perhaps? I would have to trudge out in snow shoes to check the antenna, recent storm dumped on us few days ago.

73 Kriss KA1GJU


Re: NVIDIA GTX950

Jim Smith G0OFE
 

A fair number of recommendations for the 1650 Super.. I have one here (replaced a 960) and was a significant improvement on the latter.

================================
Need help with SDR Console? If you have a problem:
Go to https://www.sdr-radio.com/support
Please follow instructions in that link.
===================================
Jim, Bournemouth, Dorset. IO90BR.
Elad FDM-S2, Airspy HF+, SDRPlay and Funcube Dongle SDR Recievers
8-element OP-DES for Band 2, 8-element LFA for 2m, 3-element LFA for 6m, 20m Windom for HF,. Wellbrook 1530 Loop for LF


On 05/02/2021 10:49, Klaus Kitzmantel wrote:

Hi Steve,

 

I have the same theme – an old i7, 16Gb RAM and only on board grafics – now 2 monitors but a 3rd in spare 😉  - and a SmallFormFactor – case….

 

The 950 is a quite old Card, i think it would be better to look for a Little younger type – i was told a 1060 was the best buy for the Money – a year ago – so pls correct me if i´m wrong or there is a better one out there….

 

 

VY 55/73 de OE5KKP / DL9KX

Klaus Kitzmantel

Hinterweintal 1, 4984 Weilbach, AUSTRIA - JN68QG -

+43 (0)676 9585388

 

Von: Steve KH6CT
Gesendet: Donnerstag, 4. Februar 2021 00:21
An: main@sdr-radio.groups.io
Betreff: [SDR-Radio] NVIDIA GTX950

 

The NVIDIA card is recommended by Simon as a good choice for SDRConsole.  Question is...  How much RAM should the card have?  My computer already has 16 GB of ram.  Along with SDRConsole, I operate with Win4Yaesu and Log4OM displayed on two 27" monitors.

Thanks for any advice. 

Steve KH6CT

 

Attachments:


Re: NVIDIA GTX950

Klaus Kitzmantel <klaus.kitzmantel@...>
 

Hi Steve,

 

I have the same theme – an old i7, 16Gb RAM and only on board grafics – now 2 monitors but a 3rd in spare 😉  - and a SmallFormFactor – case….

 

The 950 is a quite old Card, i think it would be better to look for a Little younger type – i was told a 1060 was the best buy for the Money – a year ago – so pls correct me if i´m wrong or there is a better one out there….

 

 

VY 55/73 de OE5KKP / DL9KX

Klaus Kitzmantel

Hinterweintal 1, 4984 Weilbach, AUSTRIA - JN68QG -

+43 (0)676 9585388

 

Von: Steve KH6CT
Gesendet: Donnerstag, 4. Februar 2021 00:21
An: main@sdr-radio.groups.io
Betreff: [SDR-Radio] NVIDIA GTX950

 

The NVIDIA card is recommended by Simon as a good choice for SDRConsole.  Question is...  How much RAM should the card have?  My computer already has 16 GB of ram.  Along with SDRConsole, I operate with Win4Yaesu and Log4OM displayed on two 27" monitors.

Thanks for any advice. 

Steve KH6CT

 


Re: Continuing problem with VB-Audio

Max
 

Hi Andy

Stereo mix is of limited use for routing audio for data programs, reason being it is exactly what is says: A mix of all audio sources, so the audio gets "contaminated" by audio from other sources (internet browser for example), hence the need for a clean source of audio carrying only the audio from the SDR, sometime several individual VACs carrying parallel feeds from different receivers. VAC(s) is/are therefore indispensable for this purpose.

Best

Max


On Sun, Jan 31, 2021 at 11:14 PM, G3TDJ wrote:
Just for information VB-Cable or VAC are not needed with the Intel NUC if the Realtek audio driver is installed from the Intel NUC driver download website.

With my 5th generation NUC the Realtek audio driver provides "Stereo Mix" allowing easy connection to follow on decoders, using the Windows Sound applet, without a third party virtual audio cable


Re: Whats Current

Kriss Kliegle KA1GJU
 

I posted this over a year ago, on how to set up SDRC as a server. It's a step by step guide with images:
https://sdr-radio.groups.io/g/main/message/51472

I host 12 SDR's on 5 separate servers, all open to the public. As users of my "Super Stations" will attest, I have some of the most QRM free RXR's on the network.
There are dozens of them listed, but , many, I repeat MANY, are appearing as functional. In reality, they're not... after going through all the effort of building definitions. Bookmark the following to keep tabs on your server:
http://onairv3.sdrspace.com/onair-v3.xml

You will notice MANY with the  symbol. Those are servers probably running in the background without the owners knowledge since the server is a Windows Service. There's a default setting that automatically starts the service, whether or not it's properly functioning. I think many try to get the server up and running and some how fail to get it to work. They eventually give up, but every time the computer is booted up, the Server Service starts up automatically. Its a great thing if you know what your doing, but it floods the master server at Simon's with pings saying, "I'm here for a connection...", when it's really not properly configured. This is the setting is found in the Service tab of the Server Manager:



Once the Windows Service is running, the actual Server Manager doesn't have to be in operation. It's purpose is program the service and set it up. I have it run on all my machines, so when I Teamviewer into it, I can quickly see who is using it, what frequency, etc.

73 Kriss KA1GJU
Home of the "Super Stations"


Re: Whats Current

Jon Hudson
 

Hi Richard,   this forum is for SDR-Console users and the good news is that the RSP2 and all the current RSP models are supported by the latest version of SDR Colsole V3.   This includes the ability to remotely access it over the internet  - this is an old video guide from SDRplay on doing this - the process is similar  today: https://youtu.be/z2jr_ksIMp8

SDRuno is the software provided by SDRplay and has been optimised for the RSP family of SDR receivers for when SDR and computer are together (or over a LAN using VirtualHere:   https://youtu.be/KDbOFftyEww )

More guides to do with SDRuno can be found by looking in the SDRplay apps and support catalogue: https://www.sdrplay.com/apps-catalogue/

Here's a list of links to other forums for SDRplay users where you can get independent views and help with RSP2 related questions: https://www.sdrplay.com/communitylinks/

Best regards,  Jon


Whats Current

Richard
 

 

 

To: SDR Radiio (mailto:SDR-Radio@groups.io)
Subject: Whats Current

 

I am getting back in to my SDR play 2.  {RSP-2}  What is the best software to use   and I like to run it remotely over the network.  I bought it used some 3 years ago.

 

Richard  Lenker

KB3YRC  


Re: I have a dream... #feature

jdow
 

It will be available on the second Tuesday within Next Week.

{o.o}

On 20210203 12:15:17, mmolano2000 via groups.io wrote:
... a recurrent one:  one day I open SDRConsole and I find a new mode
labeled "AMS". I click on it and I have a 30Hz-15 kHz C-QUAM AM-stereo
audio... Wow! My ASPISYS ASMAX-2 transmitter sounds brilliant!...

For now I must be happy with my CARVER TX-11A:
https://archive.org/details/am-1400-carver

Maybe some day...(?)...

73!
 
Mauricio Molano
Salamanca
ESPAÑA - SPAIN
RX site:  Aldea del Cano, Cáceres.
LAT:  39º17'09.70 N    LONG: 6º19'00 W
RX: PERSEUS.   ANT: WELLBROOK ALA1530S+
(http://moladx.blogspot.com/)




Re: I have a dream... #feature

Bill Walch
 

Good fidelity and separation for AM, but WOW!, that hard level compression!

On 2/3/2021 3:15 PM, mmolano2000 via groups.io wrote:
... a recurrent one:  one day I open SDRConsole and I find a new mode
labeled "AMS". I click on it and I have a 30Hz-15 kHz C-QUAM AM-stereo
audio... Wow! My ASPISYS ASMAX-2 transmitter sounds brilliant!...

For now I must be happy with my CARVER TX-11A:
https://archive.org/details/am-1400-carver

Maybe some day...(?)...

73!
 
Mauricio Molano
Salamanca
ESPAÑA - SPAIN
RX site:  Aldea del Cano, Cáceres.
LAT:  39º17'09.70 N    LONG: 6º19'00 W
RX: PERSEUS.   ANT: WELLBROOK ALA1530S+
(http://moladx.blogspot.com/)




I have a dream... #feature

mmolano2000
 

... a recurrent one:  one day I open SDRConsole and I find a new mode
labeled "AMS". I click on it and I have a 30Hz-15 kHz C-QUAM AM-stereo
audio... Wow! My ASPISYS ASMAX-2 transmitter sounds brilliant!...

For now I must be happy with my CARVER TX-11A:
https://archive.org/details/am-1400-carver

Maybe some day...(?)...

73!
 
Mauricio Molano
Salamanca
ESPAÑA - SPAIN
RX site:  Aldea del Cano, Cáceres.
LAT:  39º17'09.70 N    LONG: 6º19'00 W
RX: PERSEUS.   ANT: WELLBROOK ALA1530S+
(http://moladx.blogspot.com/)



Re: WiNRADiO WR-G31DDC 'EXCALIBUR'

Tracey Gardner
 

 
That's great news Simon.
 
73s Tracey G5VU
 
 

----- Original Message -----
From: Simon Brown <simon@...>
Reply-To: <main@SDR-Radio.groups.io>
To: <main@SDR-Radio.groups.io>
Sent: 03/02/2021 13:23:33
Subject: Re: [SDR-Radio] WiNRADiO WR-G31DDC 'EXCALIBUR'

And…

 

My test program works OK. It runs the G31DDC code in 32-bit process and talks to it via pipes from 64-bit Console. Now for the boring stuff, if we’re lucky a test kit next week.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 29 January 2021 13:54
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] WiNRADiO WR-G31DDC 'EXCALIBUR'

 

It’s here. I will spend the next week getting the UI & testbed written for the CW Decoder, Then I’ll add support.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 28 January 2021 18:49
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] WiNRADiO WR-G31DDC 'EXCALIBUR'

 

Bob,

 

It’ll be ~ 3 weeks. I’m spending the next week or so on my CW Decoder, getting the UI together so I can start some of the hard work. When that’s done I’ll add the G31DDC support.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of BobS via groups.io
Sent: 28 January 2021 15:26
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] WiNRADiO WR-G31DDC 'EXCALIBUR'

 

It's a significant challenge to devise an API to support multiple radios. I've tried. You essentially come up with a base-level (or least-common denominator) and then try to add the radio-specific features on top of that. Once you release the API to someone for testing, it's only a manner of time before you receive a message along the lines of "why doesn't the API support this feature?" The fact that SDR-Console supports so many different radios is a significant feat.

I am beyond excited about the prospect of G31DDC support!

Bob, W4RLS


--

- + - + -

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


--

- + - + -

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


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


Re: WiNRADiO WR-G31DDC 'EXCALIBUR'

Simon Brown
 

And…

 

My test program works OK. It runs the G31DDC code in 32-bit process and talks to it via pipes from 64-bit Console. Now for the boring stuff, if we’re lucky a test kit next week.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 29 January 2021 13:54
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] WiNRADiO WR-G31DDC 'EXCALIBUR'

 

It’s here. I will spend the next week getting the UI & testbed written for the CW Decoder, Then I’ll add support.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 28 January 2021 18:49
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] WiNRADiO WR-G31DDC 'EXCALIBUR'

 

Bob,

 

It’ll be ~ 3 weeks. I’m spending the next week or so on my CW Decoder, getting the UI together so I can start some of the hard work. When that’s done I’ll add the G31DDC support.

 

Simon Brown, G4ELI

https://www.sdr-radio.com

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of BobS via groups.io
Sent: 28 January 2021 15:26
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] WiNRADiO WR-G31DDC 'EXCALIBUR'

 

It's a significant challenge to devise an API to support multiple radios. I've tried. You essentially come up with a base-level (or least-common denominator) and then try to add the radio-specific features on top of that. Once you release the API to someone for testing, it's only a manner of time before you receive a message along the lines of "why doesn't the API support this feature?" The fact that SDR-Console supports so many different radios is a significant feat.

I am beyond excited about the prospect of G31DDC support!

Bob, W4RLS


--

- + - + -

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


--

- + - + -

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


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


Re: Continuing problem with VB-Audio

Radioman ZeroZero
 

The volume is critical for any decoding
--
Thanks Steve M0ZEH


Re: Continuing problem with VB-Audio

Bob Dengler
 

At 2/1/2021 04:23 PM, you wrote:
Hello Kevin,
I see you have some Windows update pending, please install and reboot.
I also see the output channel and the input channel sampling rates of your C cable are different, and do not match with the internal smp.
Try set everything at 48000 Hz.

It does not seem to make a difference if everything is set 48000Hz, ATCSMon still can not decode the audio from SDR-Console. I think I will just have to use SDR# in the mean time even though the newer versions crash all the time. And the windows update was on the working system.
Is ATSCMon sensitive to absolute phase? If so, try flipping phase in SDRC by going to Options panel, under Audio > Pseudo Stereo, check Enable, Delay=None, Crossover=None, Phase invert=Left.

Bob NO6B

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