Date   
Re: SAQ and the DUO

Guido Schotmans
 

common mode disturbance when installing it, but it was completely
eliminated inserting a
galvanic insulator, made with a bifilar winding on a high permeability
ferrite
core, just before entering the receiver.
Hello Alberto,

What kind of ferrite are you using here ? My experience is that using
antennas where ferrite cores are in the line like the ALA, KAZ and others
are blocking the ELF signals way too much to hear SAQ.

Happy Holydays,

Guido.

Re: SAQ and the DUO

Alberto I2PHD
 

On 12/24/2016 12:32 PM, on2ron@... [elad_sdr_en] wrote:
Alberto, as you are receiving the signal at greater distance from the generator, may I ask you what antenna you have used?

Here in Belgium the signal was very strong as we live closer to the transmitter. I have used a Roelof Bakker original miniwhip at 16 meter above ground on my roof. I also have one that is mounted in the garden at 5 meter above ground and 30m away from my house but below 100 kHz it is producing 9 dB less signal. The roof mounted miniwhip is almost not te be used above 200 kHz due to picking up noise originating from my house. I also have a miniwhip made is Russia and is not working good below 80 kHz but goes well up to 60 mHz. I live in a suburban area so noise is present on all fronts.

Good afternoon Ron,

� I am using a home built mini-whip as well. I replaced the original J310 FET with a CP-643 which I happened to have in the junk box, and it works very well.
Very sensitive also for the Alpha signals from Russia. I had a very strong common mode disturbance when installing it, but it was completely eliminated inserting a
galvanic insulator, made with a bifilar winding on a high permeability ferrite core, just before entering the receiver.

The antenna is placed on the highest chimney of my house, let's say at 15 meters above ground level, completely free from obstacles for 360 degrees.
My mini-whip works very well up to about 3 - 4 MHz. Above that, I find that its sensitivity leaves something to be desired. Never observed intermodulation
products, but luckily I don't have very strong transmitters nearby.

--
73 Alberto I2PHD
Credo Ut Intelligam


Re: BlueDuo Dropout

Giovanni Franza
 

Hi Will,
I've tested the app for more than 10 hours and it seems not to be blocking. However, playing such a long time with the app, make me aware of the presence of an annoying bug related to squelch and bands. Even if this seems not related to your problem, I kindly suggest you to install the new version, that can be found at: http://www.eladit.com/download/sdr/BLUEDUO/index.php?lang=EN
In every case I'm continuing the investigations,
Regards,

Giovanni - HB9EIK

 

BlueDuo new 0.17 release - bug fix

Giovanni Franza
 

Hi all,
today I've found a bug in BlueDuo: when you use the Squelch slider, you disable some band button (i.e: 40m). This is related to the definition of the event listener. The fix is now available on the ELAD site, along with the GPL-ed sources: see http://www.eladit.com/download/sdr/BLUEDUO/index.php?lang=EN
Regards,

Giovanni - HB9EIK

 



Re: SAQ and the DUO

on2ron@...
 

Alberto, as you are receiving the signal at greater distance from the generator, may I ask you what antenna you have used?

Here in Belgium the signal was very strong as we live closer to the transmitter. I have used a Roelof Bakker original miniwhip at 16 meter above ground on my roof. I also have one that is mounted in the garden at 5 meter above ground and 30m away from my house but below 100 kHz it is producing 9 dB less signal. The roof mounted miniwhip is almost not te be used above 200 kHz due to picking up noise originating from my house. I also have a miniwhip made is Russia and is not working good below 80 kHz but goes well up to 60 mHz. I live in a suburban area so noise is present on all fronts.

I also have tested a VLF converter with the Elad FDM-S2 and this works better. I have a gain of 9 dB S/N compared to the naked FDM_S2 and the reception is also cleaner. Seems there are some gost artifacts showing on the naked FDM-S2 below 100 kHz. On the other hands the up-converter has a 500 kHz low pass filter build in that can make a difference. The signal is shifted up 10 mHz. You can find the converter here and look for LW-converter on the on-line store:

Startseite - FUNKAMATEUR - Das internationale Fachmagazin für Amateurfunk, Elektronik & Funktechnik

 


73' Ron
ON2RON

SAQ and the DUO

Alberto I2PHD
 

Excellent reception of the annual commemorative transmission of the historical station SAQ
in Grimeton, Sweden, done using the Alexanderson alternator at 17.2 kHz

Look here :

http://www.sdradio.eu/SAQ_2016_12_24.html


For info on the SAQ go here :

http://alexander.n.se/the-radio-station-saq-grimeton/?lang=en


--
73 Alberto I2PHD
Credo Ut Intelligam


Re: DUO LINE IN/OUT NOT WORKING

Paul Marbourg
 

Hi Roman,
Thanks for your help. "USB does not work" means that although my computer shows line in/out default device as "FDM-DUO Audio v1.04" when I power on the FDM-DUO in stand alone mode and click on the audio (speaker) icon in Win7, no audio is transferred to fldigi or JT65a. 
SW2 works normally and CAT control works reliably every time. 
That's about it. It does work sometimes, but most of the time it does not. 
Happy Holidays,
Paul wn7t
Sent from my iPhone

On Dec 23, 2016, at 1:34 AM, consulttelecom@... [elad_sdr_en] <elad_sdr_en@...> wrote:

 

Hi, Paul,


Could you please explain the term "does not work"?
USB device is not recognized at your PC? Or other issues?
I had the issue of USB device not recognized. It ended up re-flashing firmware into DUO sound card with help of ELAD support.

Regards,
Roman

Re: BlueDuo Dropout

Giovanni Franza
 

Hi Will,
I will try to reproduce your problem, but I fear it can take some time.
If I have understood well, you neew to cycle the DUO. Disconnecting and reconnecting the buuetooth dongle from the DUO gives the same results ? Instead, operating only on the droid, deactivating and reactivating the bluetooth, solves the problem or you have to work on the dongle ? Do you have another dongle or another droid to test ? Sorry for having only questions and not answers for this time :-(
Regards

Giovanni - HB9EIK


---In elad_sdr_en@..., <engineer1@...> wrote :

I have built up and programmed my BlueDuo adapter (not a big deal as I use the little Bluetooth adapters for a product I sell so that was easy).  First off, REALLY NICE idea and program, and works great for a stand alone installation (no external computer).  It works great until the connection drops and most times I need to power cycle the FDM-DUO to get it working again. 

The Droid Tablet sits about a foot away from the radio and runs fine for a number of hours then the connection drops.  I power cycle the radio, restart the BlueDuo App and it runs for another 2-4 hours and then drops again.  It will drop with and without the USB connections plugged in to the DUO so it is not failing from some sort of interaction from a second control source.

Are others having similar issues or is it just my installation?  Ideas?

Firmware level is:
UI -     04.65
FGA - 02.00
USB - 04..09 
RX    - 01.30
TX     - 01.28

Thanks and 73,  Will - N7IPY

BlueDuo Dropout

engineer1@...
 

I have built up and programmed my BlueDuo adapter (not a big deal as I use the little Bluetooth adapters for a product I sell so that was easy).  First off, REALLY NICE idea and program, and works great for a stand alone installation (no external computer).  It works great until the connection drops and most times I need to power cycle the FDM-DUO to get it working again. 

The Droid Tablet sits about a foot away from the radio and runs fine for a number of hours then the connection drops.  I power cycle the radio, restart the BlueDuo App and it runs for another 2-4 hours and then drops again.  It will drop with and without the USB connections plugged in to the DUO so it is not failing from some sort of interaction from a second control source.

Are others having similar issues or is it just my installation?  Ideas?

Firmware level is:
UI -     04.65
FGA - 02.00
USB - 04..09 
RX    - 01.30
TX     - 01.28

Thanks and 73,  Will - N7IPY

HRD/HDSDR with FDM-DUO Standalone

engineer1@...
 

Is it possible to operate with HRD and HDSDR without using SW2?  Right now HRD and HDSDR work fine together and I con control the DUO via CAT.  I am not able to get the ExtIO DLLs found on the ELAD site to be recognized.  I replaced my FTDX-1200 which was working with an IF Tap fed to a FUNCUBE Dongle and then into HDSDR for a Waterfa/l/spectrum scope and used HRD to control the radio.  I am unable to figure out how to get it all to work with the FDM-DUO., minus the Funcube dongle.  Using SW2 seems to add an extra layer of complexity for my simple requirements.  
Thanks for any help - Will - N7IPY


Re: DUO LINE IN/OUT NOT WORKING

Roman
 

Hi, Paul,

Could you please explain the term "does not work"?
USB device is not recognized at your PC? Or other issues?
I had the issue of USB device not recognized. It ended up re-flashing firmware into DUO sound card with help of ELAD support.

Regards,
Roman

Re: FDM-DUO external tuner

Harris Leck
 

I use the Elecraft T1. Very small and simple to operate. Uses its own internal 9v battery.

DUO LINE IN/OUT NOT WORKING

Paul Marbourg
 

Hello Elad group,
I have an ancient creaky old Dell Latitude D600 laptop running Win7 Home edition. The CPU runs about 70% with SW2.
I am having frequent issues with running psk31 and jt65a using the FDM-DUO line in and line out as the audio link. Sometimes it works, but lately most times it does not. However, the CAT link always works without fail.
I have tried removing and reinserting USB cables. The USB support drivers are okay on Win7. I tried removing and reinstalling SW2 1.47 - complete package, but still no go. Could just be my old laptop dying, but I wonder. Anyone have any insight on this problem?
Thank you for any help forthcoming.

Cheers and happy holidays,
Paul WN7T

Sent from my iPhone

Re: FDM-DUO SW2 "Spotted station" Display

Neil Smith G4DBN
 

Hi Charlie, under the Station Memory tab there are some settings to configure the station memory source as the DX Cluster, and cluster settings.  I don't use it much as I have the same facility in my contesting software.  It can also use CW Skimmer as a source.  I had that running for a while and it was a bit of fun, but the Skimmer interface doesn't work brilliantly with a 48kHz IF feed.

The cluster spots seemed to be OK though.  I found that on a crowded band, it was best to use Oblique orientation and shorten the timeout. Page 32 of the SW2 manual sort of explains it, just ignore the bit about CW Skimmer.  It doesn't show you the effect on the display.

2.30am here and I am still working on a particularly tricky piece of network and firewall engineering that I've been fighting with since 09:00 yesterday.  Time for bed I think, I have a meeting in six hours...

Neil G4DBN


On 23/12/2016 02:04, cristorcelli@... [elad_sdr_en] wrote:
 

I see pictures and illustrations of FDM-DUO SW2 operation wherein stations "spotted" on the worldwide DX reflectors are displayed by their call sign above the pan scope/ waterfall display when operating SW2. The call sign is diplayed above the frequency where the station is spotted.

How is that set up?






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FDM-DUO SW2 "Spotted station" Display

cristorcelli@...
 

I see pictures and illustrations of FDM-DUO SW2 operation wherein stations "spotted" on the worldwide DX reflectors are displayed by their call sign above the pan scope/ waterfall display when operating SW2. The call sign is diplayed above the frequency where the station is spotted.

How is that set up?

73 de NN3V


Re: Waterfall frequency coverage.

Bill Nollman
 

Maybe under SETtings / Graphics you could tweak the blurriness.

Bill

 

From: elad_sdr_en@... [mailto:elad_sdr_en@...]
Sent: Thursday, December 22, 2016 2:42 PM
To: elad_sdr_en@...
Subject: Re: [elad_sdr_en] Waterfall frequency coverage.

 

 

- ah, Thanks Bill.

Hadn't tried that - together with using the double USB lead, I can now zoom down to around 5kHz on the main screen and around 160Hz(!!) on the IF screen.

How do I sharpen up the trace? At any zoom less than about 100kHz the trace is very blurred.

 My apologies for the beginners' questions - I belong to the age of 6V6s!

Martin  GW3UCJ.

 

Did you try the IF button in the upper right corner?

Once in there set “Before Demod Filter” and Zoom in with the magnifying glass (in the top right corner).

You might need to adjust the color bad/slider along the left edge of the waterfall to see the signals best.

 

Bill Nollman

 

 

Re: Waterfall frequency coverage. [1 Attachment]

Martin Evans <books@...>
 

_ Thanks Neil - it's the same with the S2.  I saw the one line there in the setup but didn't realise that it was a drop-down.

Changed that now, and we're getting there.

I'll get the hang of this eventually - I'm used to SDR Console and this is so entirely different.

Martin GW3UCJ.


 

On the DUO you have to select the span using the form on SET->Advanced->Device Configuration


Neil



On 22/12/2016 16:48, Martin Evans books@... [elad_sdr_en] wrote:
 

Thanks Neil.

 I can't see how to alter the BIN size with the SW2 software - the "tools" button must be there somewhere but I can't find it!...all I can see is  - and + buttons which give me a limited range of waterfall frequency spans.

Hopefully an S2 user will pop up soon and put me out of my misery.

Martin GW3UCJ.

 


On 22/12/2016 16:10, Martin Evans books@... [elad_sdr_en] wrote:
  I seem to be unable to reduce the waterfall frequency span below about

90kHz using the supplied Elad software. Is this actually the minimum
possible, or am I missing something?

Martin, on the DUO with SW2, I can zoom in to 750Hz total bandwidth when I am using a span of 192kHz and a bin size of 11.7Hz.  Using a span of 6144kHz, the bin size is 375Hz and the max zoom is 24KHz.  That is a minimum of 64 bins across the waterfall.

Not sure how it works with the S2, but on the DUO, I have a range of total bandwidths I can use.  Normally I stick with 192kHz so I get nice small bins.  I hope someone with an S2 can help you a bit more.

Neil G4DBN




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Re: Waterfall frequency coverage.

Martin Evans <books@...>
 

- ah, Thanks Bill.

Hadn't tried that - together with using the double USB lead, I can now zoom down to around 5kHz on the main screen and around 160Hz(!!) on the IF screen.

How do I sharpen up the trace? At any zoom less than about 100kHz the trace is very blurred.

 My apologies for the beginners' questions - I belong to the age of 6V6s!

Martin  GW3UCJ.

 

Did you try the IF button in the upper right corner?

Once in there set “Before Demod Filter” and Zoom in with the magnifying glass (in the top right corner).

You might need to adjust the color bad/slider along the left edge of the waterfall to see the signals best.

 

Bill Nollman



Re: Waterfall frequency coverage.

Bill Nollman
 

Did you try the IF button in the upper right corner?

Once in there set “Before Demod Filter” and Zoom in with the magnifying glass (in the top right corner).

You might need to adjust the color bad/slider along the left edge of the waterfall to see the signals best.

 

Bill Nollman

Farmington, CT

 

From: elad_sdr_en@... [mailto:elad_sdr_en@...]
Sent: Thursday, December 22, 2016 11:36 AM
To: elad_sdr_en@...
Subject: Re: [elad_sdr_en] Waterfall frequency coverage.

 

 

 

On 22/12/2016 16:10, Martin Evans books@... [elad_sdr_en] wrote:

  I seem to be unable to reduce the waterfall frequency span below about

90kHz using the supplied Elad software. Is this actually the minimum
possible, or am I missing something?

Martin, on the DUO with SW2, I can zoom in to 750Hz total bandwidth when I am using a span of 192kHz and a bin size of 11.7Hz.  Using a span of 6144kHz, the bin size is 375Hz and the max zoom is 24KHz.  That is a minimum of 64 bins across the waterfall.

Not sure how it works with the S2, but on the DUO, I have a range of total bandwidths I can use.  Normally I stick with 192kHz so I get nice small bins.  I hope someone with an S2 can help you a bit more.

Neil G4DBN

 


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Re: Waterfall frequency coverage.

Martin Evans <books@...>
 

Well I never!

Found the way to expand the waterfall Neil - use two USB sockets instead of just one.

I used the "Two USB into one" lead supplied and now I can reduce my waterfall coverage down to around 5kHz.

How unlikely is that!

Martin.  GW3UCJ.

 


On 22/12/2016 16:10, Martin Evans books@... [elad_sdr_en] wrote:
  I seem to be unable to reduce the waterfall frequency span below about

90kHz using the supplied Elad software. Is this actually the minimum
possible, or am I missing something?

Martin, on the DUO with SW2, I can zoom in to 750Hz total bandwidth when I am using a span of 192kHz and a bin size of 11.7Hz.  Using a span of 6144kHz, the bin size is 375Hz and the max zoom is 24KHz.  That is a minimum of 64 bins across the waterfall.

Not sure how it works with the S2, but on the DUO, I have a range of total bandwidths I can use.  Normally I stick with 192kHz so I get nice small bins.  I hope someone with an S2 can help you a bit more.

Neil G4DBN




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