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

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

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

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

Thank's a lot.
I will try it.

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+

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.

Do you try fresh install to new place?

--

Which comparison?

Simon Brown, G4ELI
www.sdr-radio.com

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.

I will never trust an active splitter again.

I understand.
Tnx a lot.

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

Hello:

Using last 32 bits SDR#.

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

Thank's a lot.