Date   

Re: Mini SDRC version?

Tom Crosbie G6PZZ
 

Hi Jorge,

I read an article yesterday that tells how scientists have found a way to generate frequencies in the THz band.

We’ll soon be building Yagi’s from paperclips and staples…

 

 

73 Tom G6PZZ

Nr Chesterfield | NE Derbyshire | UK | IO93he

HF250 | RSPdx | Sentinel 4 | RM50 | TR2

15m MLB | MTA | D707

 

 

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Jorge Garzón Gutiérrez via groups.io
Sent: 21 July 2020 08:24
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] Mini SDRC version?

 

Hi, 

I don't know if this has been discussed here in the past but I know many dxers (including me) that we are not attracted or interested to fx above 300MHz or 70cm band as upper limit. SDRC is the most amazing program I've used and logically many newest features will came in the microwave region, satellites, new and more complex receivers, etc... as the number of electronic toys arise. 

 

Every of these new implemented features need more CPU power and increasing memory consumption. Would it has a choice to keep a simpler SDRC version for these lower bands? (would say up to 70cm or 300MHz, or similar). 

 

It would be an interesting way to balance CPU power with the most interesting bands from VLF to VHF. 

 


Re: NooElec. HF Upconverter

David J Taylor
 

The RTL-SDR V3 uses "Direct Sampling HF Mode", which is a rather limited bodge
David,

While I have never used a v3 I see reports by people with genuine ones
who are surprised how well they do work, with examples to show it.
Yes, they are far from perfect but offer a good introduction to SDR.
Just as many others found years ago when they first came available.
Of course Martin is right, there are a lot called v3 which are not
genuine Blog v3s.

73 Alan G4ZFQ
=======================================

Alan,

I would trust these as genuine:

https://shop.technofix.uk/super-stable-1ppm-tcxo-r820t2-tuner-rtl2832u-rtl-sdr-usb-stick-version-3?search=rtl-sdr

https://www.ebay.com/itm/RTL-SDR-Blog-V3-RTL2832U-1PPM-TCXO-HF-BiasT-SMA-Software-Defined-Radio/272411458376?epid=22032165355&hash=item3f6cfcfb48:g:H1cAAOSwLMFb~9Qy

https://www.aliexpress.com/item/32939551915.html?gps-id=pcStoreLeaderboard&scm=1007.22922.122102.0&scm_id=1007.22922.122102.0&scm-url=1007.22922.122102.0&pvid=4e912552-e6f6-4742-ab11-aab169b417a1&spm=a2g0o.store_home.smartLeaderboard_828478961.32939551915

While an up-converter overcomes some of the limitations of direct sampling, it's still an 8-bit device with a ~46 dB dynamic range. With direct sampling you also get aliasing as the sampling rate is 28.8 MHz so, for example, 14.0 and 14.8 MHz appear as the same frequency and signals on these two frequencies will overlap.

As you say, a good introduction - to limited dynamic range and aliasing!

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv


Re: Mini SDRC version?

Kriss Kliegle KA1GJU
 

Jorge,
   
   CPU usage has actually gone down over the years while more features are added. You can thank Simon for his dedication and perseverance in constantly improving SDRC! Man and his dog have to eat and drink. 😉

   To Simon's credit, I can use SDRC on a 64bit, Windows 7 Netbook with an Atom processor as I normally use SDCR, with one RXR open, somewhere in the HF band. Hardly using SDRC to its full potential for sure, but it is workable with such a primitive computer! His minimum computer specs are here BTW:
https://www.sdr-radio.com/computer#SystemRequirements

   What computer are you using that has problems with SDRC? Processor? Memory? GPU?


73 Kriss KA1GJU


Re: NooElec. HF Upconverter

Alan
 

The RTL-SDR V3 uses "Direct Sampling HF Mode", which is a rather limited bodge
David,

While I have never used a v3 I see reports by people with genuine ones who are surprised how well they do work, with examples to show it.
Yes, they are far from perfect but offer a good introduction to SDR. Just as many others found years ago when they first came available.
Of course Martin is right, there are a lot called v3 which are not genuine Blog v3s.

73 Alan G4ZFQ


Re: Help Needed

martin m3ghe
 

George if you wish to try a reset then follow the instructions here, https://www.sdr-radio.com/reset

--
Martin m3ghe


Re: NooElec. HF Upconverter

martin m3ghe
 

Model? Which model of NooElec HF upconverter? They do a variety of models. Give us a link to the model you are talking about and a link to the RTL SDR v3 dongle that you actually have or are thinking of getting. There are many RTL SDR v3 dongles on sale, very few are the real thing.  
--
Martin m3ghe


Re: Help Needed

George Stein - NJ3H
 

Last Message for tonight.

1. When selecting the memory button for 1240 KHz, the spectrum/waterfall screen remains on whatever frequency was displayed before I pushed the 1240 memory button.

2. I deleted the memory and added it back.  No change.

3. Tried to add another memory in an unused memory slot.  The program froze again.

4. Also when the program restarts the Y-axis that has the signal strength in S-units, is reset from +70 to -20db.  I had it set from +30 down to S0.

5. Would like to create the log file, but the thing freezes up on me.

Is there a master reset button that I need to try?



Regards,
George


Re: Help Needed

George Stein - NJ3H
 

Additional Information:

1. I was able to get the program to start-up with the receiver selection menu.

2. I could change from 8 MHz to 100.1 FM as shown on the memories screen.  Also the program would change to 162.501.

3. However when I hit the 1240 KHz memory button, the frequency display indicates 1240, but the spectrum and waterfall, sure doesn't.  The station at 1240 was being heard while this situation was happening. Also, the spectrum/waterfall screen is frozen on the screen.

4. The attached picture shows the 1240 frequency and the waterfall/spectrum up at 145 MHz.

So please factor this information into any suggestions.

Regards,
George


Help Needed

George Stein - NJ3H
 

Something got corrupted this evening when using SDRC, vers 3.0.22.  I have since upgraded to 3.0.23, but the problem persists.

1. Using Win 8.1, 16 GB with NVIDIA 1650 Super video card.

2. The screen froze up while listening to a station  using the Elad receiver.  Had to use Task Manager to close the program.

3. When restarting the program, I do not get the initial menu which lists, the Elad receiver and the Perseus receiver - allowing me to choose one of them.  The Elad and Perseus files are still in the SDRC subdirectory as they have been from day one.

4. So I tried Receiver Tab, Select a receiver.  When I click on the button the program totally freezes and I have to use Task Manager to close it.  I tried this a couple of times - same result.

5. The attached picture shows that the SDRC GUI didn't fully load. When I clicked on the screen after 45 seconds, the rest of the GUI loaded, but not receiver list was presented.

6. The Elad and Perseus are working with their native software.

7. Of course I have rebooted the computer.

This is the first time I have had this issue with SDRC. Any help/suggestions are most welcome.

Regards,
George, NJ3H
Redmond, Oregon USA


Mini SDRC version?

Jorge Garzón Gutiérrez <iberiaDX@...>
 

Hi, 
I don't know if this has been discussed here in the past but I know many dxers (including me) that we are not attracted or interested to fx above 300MHz or 70cm band as upper limit. SDRC is the most amazing program I've used and logically many newest features will came in the microwave region, satellites, new and more complex receivers, etc... as the number of electronic toys arise. 

Every of these new implemented features need more CPU power and increasing memory consumption. Would it has a choice to keep a simpler SDRC version for these lower bands? (would say up to 70cm or 300MHz, or similar). 

It would be an interesting way to balance CPU power with the most interesting bands from VLF to VHF. 


Re: NooElec. HF Upconverter

David J Taylor
 

Perhaps the question should be "Why do you think you need an amp?"
As Tom says this is not an amp. It is an upconverter. The V3 is supposed
to cover HF so the V3 should not need an amplifier or upconverter.

73 Alan G4ZFQ
===========================================

Folks,

The RTL-SDR V3 uses "Direct Sampling HF Mode", which is a rather limited bodge and is not as good as an up-converter add-on. Even then, the dynamic range of an up-converted RTL-SDR V3 may limit its application in a busy HF environment, even if RF filtering is used.

Serious HF use needs a better receiver.

73,
David GM8ARV
--
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv


Re: NooElec. HF Upconverter

Alan
 

Is anyone familiar with this amp and will it be sufficient for an RTL SDR v3?
Perhaps the question should be "Why do you think you need an amp?"
As Tom says this is not an amp. It is an upconverter. The V3 is supposed to cover HF so the V3 should not need an amplifier or upconverter.

73 Alan G4ZFQ


Re: NooElec. HF Upconverter

Tom Crosbie G6PZZ
 

Ron,

First of all, this isn’t an amp. An upconverter converts a range of frequencies to a different band. Often this will convert HF to VHF. They work, but aren’t the best choice.

Secondly, I wouldn’t use an amp in front of an RTL-SDR. If you are using an active antenna, an amp might add more problems, rather than solve those you think you have.

 

If you are working on a tight budget, it might be a better choice to save a little more and buy a better SDR. The SDR Play range starts at around 100 dollars and would be a better choice for HF and VHF to start building up a receiving system around. I would only use an RTL for VHF.

 

Good luck!

 

Tom | G6PZZ

Nr Chesterfield | Derbyshire |UK | IO93he

HF250 | Sentinel 4 |RSPdx | RM50 | TR2 | ATS 808

15m MLB | MTA | D707

tom@...

 

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Ron Layton via groups.io
Sent: 21 July 2020 00:32
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] NooElec. HF Upconverter

 

Is anyone familiar with this amp and will it be sufficient for an RTL SDR v3?


Re: SSB Audio Clipping

jdow
 

He's set to AGC low mode. The spectrum does not look like it has exploded as you get with overloaded front end. So the clipping should not be happening. It is, however, 75 meters. I'd turn the attenuator on and see what happens.

Two possibilities exist, the station he's tuned to might be clipping. It's spectrum suggests this, Audio gains may be set too high - somewhere. The obvious source, the noise blanker, appears to be off. I'd try turning off the notch.

{^_^}

On 20200720 03:50:28, Siegfried Jackstien wrote:
try to reduce the gain a bit ... i am guessing it is set too high and in peaks it is clipping ... see you base noise level is at s7 and signals poppiung up to 9+30 ... i do not own an airspy so i do not know what max level of this sdr is (how high is dynamic range) ...
greetz sigi dg9bfc
ps where are other airspy users when you need them hi hi
Am 20.07.2020 um 10:44 schrieb W8RMV:
Instead of "adding a picture" I tried attaching.


Re: SSB Audio Clipping

jdow
 

Generally speaking that is the best way, anyway.
{o.o}

On 20200720 03:44:10, W8RMV wrote:
Instead of "adding a picture" I tried attaching.
Screenshot-2020-07-19-231401.png


Re: Program changing with open programs

jdow
 

Take a long browse through "tools->options".

{o.o}

On 20200720 10:19:59, John K5JRW via groups.io wrote:
Running SDR console v3 latest version with RTLSDR.COM V3 dongle.                          When  I click the mouse to open a minimized  The dis play on the sdr console v3 will change to 14.074 no mater what band I'm on.Sometimes it will also cause the radio a yeasu ft1200dx to change to14.074 not matter what band i'm on.
Thanks in advance 73 John K5JRW
Screenshot-2020-07-20-111412.png
Screenshot-2020-07-20-103247.png


Re: Ident0 - How to...

jdow
 

Let me add to that - I'd rename (right click select rename) ident0 to ident0x, import, if I liked the results I'd then delete ident0x.

{^_^}

On 20200720 14:42:00, Greg Gilbert wrote:
Hi,
How do I import a saved Ident0.reg file into Console?
Comments welocme.
Greg
1.png


Re: Ident0 - How to...

jdow
 

Double click on it. In regedit "file->Import" does the trick.

{^_^}

On 20200720 14:42:00, Greg Gilbert wrote:
Hi,
How do I import a saved Ident0.reg file into Console?
Comments welocme.
Greg
1.png


Re: Freq. Readouts ?

jdow
 

The simple answer, of course, is sort of snotty so I elected not to say something like "Does it walk like a duck, quack like a duck, swim like a duck, and fly like a duck? It probably is a duck." The frequency shown is very close to an unsigned 32 bit number overflow in Hz. After all, the problem DOES some from the Euro sort of people using "," as if it were a decimal point and "." as.... well you know.

{^_-}

On 20200720 11:04:37, Dimitry Borzenko wrote:
704Hz
------ Original Message ------
From: "rmrrgs" <rgsrose@... <mailto:rgsrose@...>>
To: main@sdr-radio.groups.io <mailto:main@sdr-radio.groups.io>
Sent: 20.07.2020 20:25:35
Subject: [SDR-Radio] Freq. Readouts ?

Just want to be sure I have this right:

when I see a freq. in the display shown as:

    4.294.032.704

and in the small tab window in the Waterfall view as:

    4294.032.704 MHz

This is:     4 GHz
             294 MHz
               32 KHz
                0.704 Hz

Correct, or...?

Thanks,
Bob


Re: Freq. Readouts ?

jdow
 

Show a picture? But be aware that the author is British which is "more or less" European flavored. They use . where we use . and vice versa. I think Simon put in some handling for that situation in one or two places. But, pretty much, it's a hodge podge. Bottom of waterfall uses . as decimal point. Frequency displays use . as thousands separators. I adapt without thinking.

{^_-}

On 20200720 10:25:35, rmrrgs wrote:
Just want to be sure I have this right:
when I see a freq. in the display shown as:
    4.294.032.704
and in the small tab window in the Waterfall view as:
    4294.032.704 MHz
This is:     4 GHz
             294 MHz
               32 KHz
                0.704 Hz
Correct, or...?
Thanks,
Bob

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