Date   

Re: HF+ vs NetSDR Comparison

Joe F. KC8RKL
 

Hello all-

At http://sdr-radio.com/AirspyHFPlus

With regard to the NDB band comparision- when I click on the two 'thumbnails' to pull up more detailed screenshots, the HF+ screenshot is taken at 21:05:38 while the NetSDR screenshot is at 22:04:02. Signal and noise levels in the NDB band can vary quite a bit in that amount of time. Probably due to a file naming hiccup during webpage creation.

73,

Joe F. KC8RKL


Airspy R2 + Spyverter R2 questions

Normand Fortin
 

Hi everyone, my 1st post, quick intro, i've been scanning for 30+ years,
SDR"ing" for the last 3 years, with several nooelec dongles including
v3. I jumped in the Airspy / spyverter wagon couple weeks ago with the
R2 versions. So far the Space WX has been rocking since then (East
Canada often covered in auroral spwx lately) so i haven't had a chance
to give it a good test although i received good bits from time to time.
I'm using a long wire 30' connected to a Miracle whip antenna
preselector that was working awesome in any previous setup, but the spys
are so sensitive i might have to rethink it.

But first, questions:

  1 - The airspy unit gets warmer while in use and this is expected, the
Spyverter remains room temp, i was expecting it to warm up as well, is
that normal?  (bias Tee is on and i do receive stuff, not much more than
nooelec v3)
2- I started as suggested with linearity gain but does somebody has a
"recipe" with free gains control i tried several with mitigated success
til now ?
3- Is there a decimation sweetspot that yield better isolation of faint
signals?
4- I will have a hamitup noise source handy soon, is there some
reference signal specs i can use to test and make sure my Airspy / SV
combo is up to what it should be?

To further clean up rx, i will use a cavity / fm trap as i can see some
overloading and also make a copper box for antenna connection.

The spy's are a different beast, and although a read a lot on it, i'd
like some inputs, including your current rx performance in the actual
sun condition.

I follow closely Simon HF+ testing as well (really promising), so if
somebody has some figures for R2 versions, i could rule out the
defective unit possibility (although least probable but this is the 1
check to be done before blaming it on SPWX / location)

Thanks

Norm
Monitoring waves from Quebec, Canada


Re: Why can't i change samplerate?

EB4APL
 

Hi Ruben,

A more easier (and safer) way to change the audio sample rate is:

- In the Source Tab, select a radio that is Sound Card based, i.e. "Softrock (Si570)"  or "IQ from Sound Card". You don't need to have installed the selected hardware.

- Now the Sample Rate selections are enabled in the Audio Tab. Select what you want.

- In the Source Tab, now select back your radio, i.e. AIRSPY. The sample rate box in the audio Tab is grayed out, but your previous selection is kept.

- Exit the program. All your configuration is saved in the SDRSharp.exe CONFIG file for future use.

A note of caution: errors when manually editing the configuration file translates into bad things, so be very careful when editing it manually. I do it from time to time, but I recommend to avoid it if possible, as in this case.

73 de Ignacio, EB4APL


El 29/09/2017 a las 14:47, Ruben Navarro Huedo (EA5BZ) escribió:
Thank's a lot.
I will try it.
_._,_._,_




Waiting AIRSPY HF+

Roberto Zinelli
 

In meantime.... Play with Spyserver!

https://www.youtube.com/watch?v=lxT4_uJcdpc

Remote station build with a OrangePIZero, OS Software Armbian, Spyserver and NeoRouter-Mesh for the VPN. Internet is provided by a 3G Router. The server is received in Modena with SdrSharp 1583
BTW the cw station received is IQ2MI/B, 275 Km far away, installed on Capanna Regina Margherita c/o Monte Rosa at 4560 Mt on sea level.
73 IW4ENS Roberto


Re: Why can't i change samplerate?

Ruben Navarro Huedo (EA5BZ)
 

Thank's a lot.
I will try it.


Re: Why can't i change samplerate?

Kenneth Sejkora
 

You can force a different sample rate by editing the SDRSharp.exe CONFIG file.  That file is an ASCII text file that you can modify with a text editor like Notepad and contains two vales related to sample rate. 

The first one is about 30 rows down from the top of the file and is something like:
    <add key="minOutputSampleRate" value="96000" />

The second one is about 35 rows up from the bottom of the file and is something like:
    <add key="sampleRate" value="192000 sample/sec" />

You can adjust the values to whatever works for your SDR dongle and system sound card.

I hope this helps.

Ken, WB0OCV Norton, MA USA 41.959546N, 71.133996W



From: Ruben Navarro Huedo (EA5BZ) <runahue@...>
To: main@airspy.groups.io
Sent: Thursday, September 28, 2017 2:58 PM
Subject: [airspy] Why can't i change samplerate?

Hello:

Using last 32 bits SDR#.

Why can't i change samplerate?
Always fixed to 48000.

Thank's a lot.



Re: HF+ vs NetSDR Comparison

prog
 

You are most likely confusing the "dBm" scale with the actual noise floor (Check the MDS in the spec sheet). There are only two things to check in these screenshots:
* SNR => A slight advantage for the HF+
* Overloading => also a slight advantage for the HF+


Re: HF+ vs NetSDR Comparison

Roberto Zinelli
 

Thank you Simon, nice comparison.  Sure HF+ my next sdr.

Inviato da OldPhone

Il giorno 28 set 2017, alle ore 23:43, Simon Brown <simon@...> ha scritto:

So,

 

Done properly (or at least better) this time: http://sdr-radio.com/AirspyHFPlus

 

Simon Brown, G4ELI
www.sdr-radio.com

 


Re: HF+ vs NetSDR Comparison

Joe M.
 

Ahhh... I didn't see there were multiples. The first one (VLF).

The others are more of a trade-off. 10 dB lower noise floor and signal.

Still, quite a respectable performance against a unit that costs around 10 times more.

Joe M.

On 9/28/2017 6:01 PM, Simon Brown wrote:
Which comparison?

Simon Brown, G4ELI
www.sdr-radio.com

-----Original Message-----
From: main@airspy.groups.io [mailto:main@airspy.groups.io] On Behalf Of Joe
M.
Sent: 28 September 2017 22:57
To: main@airspy.groups.io
Subject: Re: [airspy] HF+ vs NetSDR Comparison

Correct me if I'm wrong, but that looks like 10 dB lower noise floor AND 10
dB more signal. (a 20 dB overall gain in range)

Joe M.

On 9/28/2017 5:43 PM, Simon Brown wrote:
So,

Done properly (or at least better) this time:
http://sdr-radio.com/AirspyHFPlus

Simon Brown, G4ELI
www.sdr-radio.com






---
This email has been checked for viruses by AVG.
http://www.avg.com


Re: SDR# stopped working

safar2000@...
 

Do you try fresh install to new place?


Re: HF+ vs NetSDR Comparison

David Eckhardt
 

I'm guessing you refer to the VLF non-directional beacon plots.  Remember, its not about absolute levels but (S+N)/N ratios.

Dave - WØLEV 

On Thu, Sep 28, 2017 at 4:01 PM, Simon Brown <simon@...> wrote:
Which comparison?

Simon Brown, G4ELI
www.sdr-radio.com

-----Original Message-----
From: main@airspy.groups.io [mailto:main@airspy.groups.io] On Behalf Of Joe
M.
Sent: 28 September 2017 22:57
To: main@airspy.groups.io
Subject: Re: [airspy] HF+ vs NetSDR Comparison

Correct me if I'm wrong, but that looks like 10 dB lower noise floor AND 10
dB more signal. (a 20 dB overall gain in range)

Joe M.

On 9/28/2017 5:43 PM, Simon Brown wrote:
> So,
>
> Done properly (or at least better) this time:
> http://sdr-radio.com/AirspyHFPlus
>
> Simon Brown, G4ELI
> www.sdr-radio.com










--
Dave - WØLEV
Just Let Darwin Work


Re: HF+ vs NetSDR Comparison

Simon Brown
 

Which comparison?

Simon Brown, G4ELI
www.sdr-radio.com

-----Original Message-----
From: main@airspy.groups.io [mailto:main@airspy.groups.io] On Behalf Of Joe
M.
Sent: 28 September 2017 22:57
To: main@airspy.groups.io
Subject: Re: [airspy] HF+ vs NetSDR Comparison

Correct me if I'm wrong, but that looks like 10 dB lower noise floor AND 10
dB more signal. (a 20 dB overall gain in range)

Joe M.

On 9/28/2017 5:43 PM, Simon Brown wrote:
So,

Done properly (or at least better) this time:
http://sdr-radio.com/AirspyHFPlus

Simon Brown, G4ELI
www.sdr-radio.com


Re: HF+ vs NetSDR Comparison

Joe M.
 

Correct me if I'm wrong, but that looks like 10 dB lower noise
floor AND 10 dB more signal. (a 20 dB overall gain in range)

Joe M.

On 9/28/2017 5:43 PM, Simon Brown wrote:
So,

Done properly (or at least better) this time:
http://sdr-radio.com/AirspyHFPlus

Simon Brown, G4ELI
www.sdr-radio.com


HF+ vs NetSDR Comparison

Simon Brown
 

So,

 

Done properly (or at least better) this time: http://sdr-radio.com/AirspyHFPlus

 

Simon Brown, G4ELI
www.sdr-radio.com

 


Re: HF+ WX Reception

prog
 

I will never trust an active splitter again.


Re: HF+ WX Reception

Simon Brown
 

Ah,

 

The measurements are all wrong. Am writing a new blog post, will post here when ready. Start saving for the HF+ 😊 .

 

Simon Brown, G4ELI
www.sdr-radio.com

 

From: main@airspy.groups.io [mailto:main@airspy.groups.io] On Behalf Of Simon Brown
Sent: 28 September 2017 17:37
To: main@airspy.groups.io
Subject: Re: [airspy] HF+ WX Reception

 

And here’s a similar shot using the NetSDR with extra good TXCO, same antenna as HF+.

 

Simon Brown, G4ELI
www.sdr-radio.com


Re: Why can't i change samplerate?

Ruben Navarro Huedo (EA5BZ)
 

I understand.
Tnx a lot.


Re: HF+ WX Reception

Simon Brown
 

Yes,

 

I did when I first received it and added support. From memory the HF+ has better MDS & Dynamic Range, I could bring it into the radio room/office but it’s usually in use remotely by a colleague in the US.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

From: main@airspy.groups.io [mailto:main@airspy.groups.io] On Behalf Of n2msqrp
Sent: 28 September 2017 19:55
To: main@airspy.groups.io
Subject: Re: [airspy] HF+ WX Reception

 

Simon,

 

Have you had a chance check out the VHF reception on the Elad FDM-S2?

 

Mike N2MS

 

 

On 9/28/2017 1:30 PM, Simon Brown wrote:

Ruben,

 

I have everything 😊 . I’ll get the log periodic onto the rotator and then do some proper tests.
Playing with 2m and Marine 156MHz produces quite amazing results, the radio is unbelievably sensitive yet doesn’t overload.

 

Simon Brown, G4ELI
www.sdr-radio.com

 


 

 


Re: Why can't i change samplerate?

prog
 

If something is grayed, it means it's not applicable to your context.
You are not streaming from a sound card.


Why can't i change samplerate?

Ruben Navarro Huedo (EA5BZ)
 

Hello:

Using last 32 bits SDR#.

Why can't i change samplerate?
Always fixed to 48000.

Thank's a lot.

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