Date   

Re: where to get spyserver support

jdow
 

In theory here, I think. Prog may be a bit preoccupied with an unspecified good thing at the moment.

{o.o}

On 20220226 15:03:19, __jmp wrote:

What is the preferred place to get help on spyserver?

J






Re: Airspy HF+ Discovery & WebSDR on Raspberry Pi

BHall
 

Thanks, G3TDJ for the reply!

Do you need to run hfp_tcp server on Raspberry Pi in order to see it from the SDR Receiver iPhone app, Or does it have native Spyserver support?

Thanks!

On Feb 27, 2022, at 12:33 PM, G3TDJ <g3tdj@...> wrote:

Try the Raspberry Pi Spyserver build and use the SDR Receiver app for the iPhone and SdrDx on the MacBook, both these clients support a remote AirSpyHF+D





Re: Ordering hf discovery in bulk

Airspy US
 

If you are in our area we can support that with current inventory. You did not say where you are located. 

---------
Airspy.US
Your USA source for quality SDR products!
www.Airspy.US

NOTE: This email address is NOT MONITORED. If you want to email us use our normal email address. 

On Feb 27, 2022, at 3:13 PM, __jmp <isaac.gerg@...> wrote:

I would like to order 100 of these devices for a lab.  Can you support
an order like this?

J






Ordering hf discovery in bulk

__jmp
 

I would like to order 100 of these devices for a lab. Can you support
an order like this?

J


Re: Airspy HF+ Discovery & WebSDR on Raspberry Pi

G3TDJ
 

Try the Raspberry Pi Spyserver build and use the SDR Receiver app for the iPhone and SdrDx on the MacBook, both these clients support a remote AirSpyHF+D


Re: SDR# IF-Spectrum

Edward MacDonald
 

This is actually a plugin I made. It is not compatible with the current version of SDR# but I am working on this and many other plugins. However I have no time frame as to when I will be releasing an update but once my new website is functioning I wl let you know.


On Sun., Feb. 27, 2022, 10:14 a.m. Dirk, <dottensm@...> wrote:
In older SDR# (e.g. 1732) I could tune into the exact frequency with the help of the IF-Spectrum at the bottom of the screen.
In newer versions (e.g. 1842) the IF-Spectrum isn't there directly after the installation, but can be activated as "IF-Filter - Notch Processor" (similar app?).

But the new IF-Filter display is only a flat curve without the possibility to see the carrier.

I added two screenshots:
The 1st shows the reception of a VOR station at 115,2 MHz with SDR# 1732. It is very easy to adjust the peak in the IF-Spectrum to tune into the exact frequency. In addition I can move the sliders L and R to change the IF-Spectrum bandwidth.
The 2nd shows the same carrier with SDR# 1842 with the activated "IF-Filter - Notch Processor" app. This is only a flat curve without sharp peak (seems to be very low bandwidth, but cannot be changed).

My question is:
How can I get a similar IF-Spectrum display like with 1732 also with the newer versions?
Is there a simple way I don't see actually?

Or is the new "IF-Filter - Notch Processor" not the same as the "IF-Spectrum" of the older versions? If yes: can I add an app "IF-Spectrum" to the new versions?
Or is there a way other than over the IF-Spectrum to exactly tune to a known frequency e.g. for frequency calibration purposes?

 
 

Attachments:


Re: Airspy HF+ Discovery & WebSDR on Raspberry Pi

BHall
 

Emmanuel,

Thanks for the reply. I have also submitted a request to PA3FWM for the WebSDR files, but never got a response, unfortunately.

I would use Spyserver, but I would like to be able to do monitoring from my MacBook and iPhone, and, as far as I understand, SDR# is required on the client side to monitor an Airspy with Spyserver, which is why I was looking for a web-based solution. 


OpenWebRX is promising, but lacks some required functionality such as configurable tuning steps and has other issues that likely will not be resolved in the near future.

I can’t understand why WebSDR is so closely guarded.

73


SDR# IF-Spectrum

Dirk
 

In older SDR# (e.g. 1732) I could tune into the exact frequency with the help of the IF-Spectrum at the bottom of the screen.
In newer versions (e.g. 1842) the IF-Spectrum isn't there directly after the installation, but can be activated as "IF-Filter - Notch Processor" (similar app?).

But the new IF-Filter display is only a flat curve without the possibility to see the carrier.

I added two screenshots:
The 1st shows the reception of a VOR station at 115,2 MHz with SDR# 1732. It is very easy to adjust the peak in the IF-Spectrum to tune into the exact frequency. In addition I can move the sliders L and R to change the IF-Spectrum bandwidth.
The 2nd shows the same carrier with SDR# 1842 with the activated "IF-Filter - Notch Processor" app. This is only a flat curve without sharp peak (seems to be very low bandwidth, but cannot be changed).

My question is:
How can I get a similar IF-Spectrum display like with 1732 also with the newer versions?
Is there a simple way I don't see actually?

Or is the new "IF-Filter - Notch Processor" not the same as the "IF-Spectrum" of the older versions? If yes: can I add an app "IF-Spectrum" to the new versions?
Or is there a way other than over the IF-Spectrum to exactly tune to a known frequency e.g. for frequency calibration purposes?

 
 


Re: My BandPlan.xml not being read properly #bandplan

bgaphoto@...
 

Correct, the location of the 'BandPlan.xml' file to edit is:  /SDRSharp/Instances/Profile1 or /Profile2.  Editing the file in /Profile1 worked for me.

-Brian


Re: My BandPlan.xml not being read properly #bandplan

bgaphoto@...
 

After a few more hours of poking around, it looks like the latest version of SDR# has a couple 'BandPlan.xml' files down through the install directory.  Previously, the files in /SDRSharp/bin was the one that you would edit.  This was confirmed in the 'Big Book' documentation.

However, I found an /SDRSharp/Profiles directory, and within there was another subdirectory that also had 'BandPlan.xml'.  Editing that file and restarting the software addressed my issue.

Happy to pass along what I learned, especially if it helps even one person.  Awesome software, and love all the features!

-Brian


Re: Airspy HF+ Discovery & WebSDR on Raspberry Pi

 

Hello is there a way I can get a copy of the websdr files?

the developer flat out refuses to give me a copy

it is the most blind friendlyness web sdr out there

I tried explaining this to him and he still refuses

thanks

Hank

On 2/27/2022 1:58 AM, SV1BTL wrote:

Hello,
Ask first from Pieter-Tjerk de Boer (pa3fwm@...) to give you a fresh copy of WebSDR files (including websdr server).
Then contact me to give you a tutorial of how to setup it, so to work with Airspy Discovery and/or Airspy HF+, using WebSDR.
A working test server is here : WebSDR on SV1BTL in Athens, GR  (the server is occasionally available only for test purpose). The server is working with "bands", because of 768KHz bandwidth limits of Airspy HF+ and Discovery receivers. This fact causes a mess when more than one user is connected, specially when there is a user who wishes to QSY. That's why I don't advice sharing your server to public.
Special thanks to OH5HB for modified driver - GitHub - ON5HB/hfp_tcp: Rtl_tcp-server for the Airspy HF+ and Discovery for websdr.org software. and SV2AMK for his help with band operation.

P.S. Although it possible to work with WebSDR and Airspy Discovery / HF+ using Rasspberry Pi 3 or 4, I think that SDR# and Spyserver is rather the best solution for sharing your receiver.

73 de SV1BTL (Emmanuel)


Re: Bias tee power from Pi4?

Dirk
 

Battery is always much better than USB- or other mains power source for a Mini Whip.
If you don't believe: try what you plan to do.


Re: Airspy HF+ Discovery & WebSDR on Raspberry Pi

SV1BTL
 

Hello,
Ask first from Pieter-Tjerk de Boer (pa3fwm@...) to give you a fresh copy of WebSDR files (including websdr server).
Then contact me to give you a tutorial of how to setup it, so to work with Airspy Discovery and/or Airspy HF+, using WebSDR.
A working test server is here : WebSDR on SV1BTL in Athens, GR  (the server is occasionally available only for test purpose). The server is working with "bands", because of 768KHz bandwidth limits of Airspy HF+ and Discovery receivers. This fact causes a mess when more than one user is connected, specially when there is a user who wishes to QSY. That's why I don't advice sharing your server to public.
Special thanks to OH5HB for modified driver - GitHub - ON5HB/hfp_tcp: Rtl_tcp-server for the Airspy HF+ and Discovery for websdr.org software. and SV2AMK for his help with band operation.

P.S. Although it possible to work with WebSDR and Airspy Discovery / HF+ using Rasspberry Pi 3 or 4, I think that SDR# and Spyserver is rather the best solution for sharing your receiver.

73 de SV1BTL (Emmanuel)


Re: Bias tee power from Pi4?

vk2gel
 

Thanks Al, bias tee power from the Pi is no more noisy than battery. None of the built in smoke has leaked out yet.

G


where to get spyserver support

__jmp
 

What is the preferred place to get help on spyserver?

J


My BandPlan.xml not being read properly #bandplan

bgaphoto@...
 

Good day...

I just upgraded my installation to the latest version (1854) and see that the BandPlan.xml is not getting read properly.  I have confirmed that there are no typos in the file, and that it works fine with the earlier version I had installed (1840, I believe).

Has anyone else seen this behavior?  I confirmed that I disabled SDRSharp from writing out the file again on exit.  Looking for a solution.

Thanks!

Brian


" IF_Average "

alex pettit
 

Hello,

There is a unique Plug-In  "IF_Average " written in 2016 by Daniel Kaminski.
It is Specifically for Astronomical Radio Telescope data collection.
It provides 100,000 to a million averages to be accumulated, a pre-test Background Subtraction Calibration mode, and
auto saving of columns of frequencies and amplitudes .
I have not found anything similar, Nor, have I been able to find any way to contact the author.
 
I would like to make a few modifications.
Does anyone know how obtain the source code or specifically :
How the Background Normalization / Calibration is performed ?

Thank You for Your Help,
Alex  KK4VB
Winter Springs Fla


Re: Sdr receiver protector

jdow
 

Or if you don't believe simple math such as Dave delineates and do (properly) have a dummy load for tuning amps and an oscilloscope then put the dummy load on the receive antenna. Put the O'scope across the dummy load. Fire up your transmitter. Read the peak to peak voltage. Use the arithmetic you learned to pass your FCC exam and calculate the power that would be going into your receiver.

(A ham station without some basic "almost calibrated" instruments is a bad joke.)

{^_^}

On 20220224 10:34:44, W0LEV wrote:

A tool is available to far better assess these possible damage problems other than "try it and see what breaks": the NANOVNAs.  They cost as little as $60 and as high as $160.  They will allow you to directly measure the isolation between existing antennas.  From that data, you can easily assess the power levels present on non-used antennas imposed by the transmit antenna at the time. 

I have two HF antennas of which are of concern to me.  One is my 480-foot long doublet - my major HF antenna.  The other is a 40-meter dipole used for NVIS on that band (it's low to the ground).  I have measured -45 dB isolation on 40-meters between the two antennas.  So, for 100 watts on either one, the "non-used" antenna will exhibit roughly 100-watts X 3.16 x 10^5 = 3.16 x 10^-3 watts or 3.16 mW.  So I have a solid number.  The 3.16 x 10^-5 comes from expressing the -45 dB as a numerical ratio [10^(dB value) / 10)].  If you don't understand that conversion, go bone up on the dB in general and logarithms (HS algebra).    

Check out:   https://nanovna.com/

There are quite a number of variations (and clones of the originals - what else is new from China?).  Avoid the clones.

Dave - WØLEV   

On Thu, Feb 24, 2022 at 1:12 PM KD2OM <steve@...> wrote:
I have been using CrossCountry Wireless receiver protectors for several years and have never had a problem. I only run a maximum of 500 watts, and the antennas are around 75 feet away from transmit antennas. I use them with a beverage, dipole and a delta loop which are parallel to the transmit dipole.

73
Steve KD2OM


--
Dave - WØLEV
Just Let Darwin Work



Airspy HF+ Discovery & WebSDR on Raspberry Pi

BHall
 

Hello,

A little while ago I remember a pinned thread that had a thorough walkthrough, along with the accompanying files for setting up the Airspy HF+ Discovery with WebSDR on a Raspberry Pi. I searched and couldn't find it. Does anyone still have access to that thread and the associated files?

Not ready to go with OpenWebRX due to the limitations in tuning steps, etc.

Thanks!


Re: LF limit

jdow
 

It's easy to forget you do not NEED much of an antenna at HF to receive. I forget it often. The good antenna is for transmitting. For reception "If connecting the antenna increases the noise floor you're done unless you need directivity to knock out interference."

{^_-}  (That's SO easy to forget.)

On 20220225 09:38:42, W0LEV wrote:

I get internet via a 5 GHz link to a tower about 1.5 miles away.  It's fine for us.  I don't live on the internet, well, email maybe, and we do not get cell service - for which I'm thankful.

Those who claim the discone for VLF/ELF works fine don't realize it's just a capacitive probe.  Really not much of an "antenna".  But, so be it.  As I've written many times, there is more snake oil, sorcery, and witchcraft among the amateur ranks when it comes to antennas and transmission lines than any other subject.  

Dave - WØLEV  

On Fri, Feb 25, 2022 at 5:59 AM jdow <jdow@...> wrote:
I'd only pick a minor point here. On the basis of "if it conducts it radiates, we only negotiate how well," consider that what you have is a low capacitance probe antenna usually with a fair amount of comparatively high capacitance feed line. Very strong signals will get through. And much of the HF SWL band has incredible signal levels. It is also VERY true that a better antenna for that use is relatively easy to build. A telescoping whip could serve at most frequencies.

It sound like you've built up such a better antenna system. Up in that location how is your internet service?

{o.o}

On 20220224 09:36:20, W0LEV wrote:
A discone is good in that properly designed and constructed, the feed impedance stays on or within the 2:1 circle on the Smith Chart over a 10:1 frequency range (for example, 100 MHz through 1 GHz).  However, that's about all it exhibits for a claim to fame.  It is no better than a 1/4-wavelength above a GP within its 10:1 frequency range and horribly worse outside that range.  Further the lobes raise and lower based on frequency and the polarization changes with frequency.  I had one up for 15 years while living in Albuquerque and the feedline to it was seldom connected to any receiver.  It is NOT useful much below its lower design frequency (usually the 1/4-wavelength of the skirt).   I presently have two discones in the garage, but they are not in use nor planned for use.   Don't expect miracles from a discone!

I have several shielded loops I use for VLF/ELF reception.  Yes, they require a preamp, but I have no trouble receiving the submarine comms, even good to 3 to 5 kHz.  The largest is a 2-meter diameter shielded loop on the eastern escarpment.  It is tasked only for VLF/ELF, and the very low portion of the HF frequencies.  I also have a small 0.5-meter diameter shielded loop I typically use for DFing with no preamp, but it's not bad (with preamp) at picking up the submarine comms as well.   The loops do not suffer local noise pickup as I'm pretty isolated half way up the eastern side of a N/S valley in the foothills of the N. Colorado Rockies - not typical of city dwellers.  The nearest low density 'development' (as such) is some 2-miles to my north along the valley.    

The third antenna used for both amateur radio purposes and 'casual' non-amateur listening is a 480-foot doublet.  It's not high, only some 35 feet at the feed point and fed with a parallel conductor transmission line.  It does well about everywhere.  However, it is considerably more noisy than the loops.

Everything is a compromise.  Pick you needs and what you are willing to compromise.  

Dave - WØLEV

On Thu, Feb 24, 2022 at 7:50 AM Alan G4ZFQ <alan4alan@...> wrote:
On 23/02/2022 19:49, Kriss Kliegle wrote:
 > Why stop at 300Hz (Typo for 300kHz?),

The specification of a HF+:- HF coverage between 0.5 kHz .. 31 MHz
Unless it is a typo..

But it certainly goes down to 10KHz where I receive the Russian Alpha
stations.

 > It's all about having a good antenna, especially a very long one.

More about a quiet antenna? My best is a 40 year old Icom discone, one
with a whip extension. An eprobe is my second best.
Nothing else I've tried works although I do not have the ability for
long or remote antennas, my others probably pick up too much local QRM..

73 Alan G4ZFQ








--
Dave - WØLEV
Just Let Darwin Work




--
Dave - WØLEV
Just Let Darwin Work


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