Date   

Re: SDR Receiver Recommendations

John, G4DRS <g4drs@...>
 

Thank, Mark.
receive bandwidth (768K receive bandwidth

I thought that the really good soundcards had 192kHz bandwidth. Why would a wider bandwidth than that be of use? Or are there sound cards with greater bandwidth?


John
G4DRS


Re: Can not connect to server

Simon Brown
 

ūüėä

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Brent Mcl
Sent: 13 February 2019 01:45
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Can not connect to server

 

fixed was a router problem 


Re: Can not connect to server

Brent Mcl
 

fixed was a router problem 


Re: Can not connect to server

Kenneth Phillips
 

For some reason I am having connection problem connecting to server too in my VM environment. my windows 7 32bit and 64 bit works fine but when I created a windows 8 64 bit or windows 10 64 bit it will not run.I have 3.05 up now on windows 7 64bit and every thing is running fine, but 3.04 and 3.05 with windows  8 and 10 will not start even on the server. these are VM machines   


Can not connect to server

Brent Mcl
 

I not been able to connect for awhile its worked great power went out one day now this ?


Re: SDR Receiver Recommendations

Mark Cayton <mcayton@...>
 

Hi John,

Here's what I look for in an SDR receiver:

1)  Wide spectrum coverage (the Airspy HF+ won't receive the 6-meter band or anything above 260 mHz).

2)  Plenty usable receive bandwidth (768K receive bandwidth [i.e., Airspy HF+] isn't wide enough to capture anywhere near the full 10 meter ham band, or 6 meters, or 2 meters, or 70 cm, etc.).

3)  Plenty usable dynamic range for whatever band or mode I'm working -- 64 dB isn't enough [i.e., no RTL dongles], but I've never seen any situation where 110 dB was ever needed [i.e., Airspy HF+].

In that framework, any of the SDRPlays fill my needs perfectly.

--
Mark  K1LSB


Re: ANAN RX Sensitivity above 21.500 Mhz

Edward Clark <edclarkiv1@...>
 

Version 3.0.5  Sorry.


ANAN RX Sensitivity above 21.500 Mhz

Edward Clark <edclarkiv1@...>
 

Just tried to listen to 10 meters.  I was getting a lot of spurious noise and birdies.  Swapped to Thetis and it was quiet. 

So I fired up my HP8640B and decided to check my RX Sensitivity.  I found that SDRC has the same sensitivity as Thetis at 21.500 MHz and below.  But switching SDRC up to 21.501 MHz drops sensitivity by about 20 dbm and introduces all of the spurious signals. 

Does anybody else have the gear to validate this for me?

Thank you,
Ed
WD4ED


Re: Lime SDR and PTT out #poll

Simon Brown
 

Hi,

 

3.0.6 supports GPIO with Lime, I will add some Arduino PTT support as well.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Onno Bakker
Sent: 12 February 2019 11:22
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] Lime SDR and PTT out #poll

 

A new poll has been created:

HI,

I am new to this group.

I have tried a lime sdr (usb 3) with sdr console and it works.
A small amp with a 2n 5109 gives me 3 watt output.
But it does not have a ptt out so I have to switch manualy from rx to tx the antennab relais.

In openhpsdr  ( I use that with an Anan 200d and a redpitaya) there is a CAT possibility for PTT.
a simple usb to serial port cable gives switching dsr to - 9 and + nine volts. 
My question to Simon is now is it possible to implement that in SDRconsole v3.

Thanks for answering in advance.

Onno  (callsign PA0ONO)

1. if i kwow the answer ???
2. it must be possible !!

Vote Now


Pluto receiving Es'Hail 2

Simon Brown
 

Hi,

 

Twitter link: https://twitter.com/PE1OFO/status/1095393398381527043 Console & Pluto.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 


Re: SDR Receiver Recommendations

Le Pims
 

Hi John,

I suggest you look at these excellent videos from  Dave W8KFJ
SDR School Part One The Basics  https://www.youtube.com/watch?v=ncxyycmSeWU
and
SDR School Part Two The Hardware  https://www.youtube.com/watch?v=1JSyaZ_VS6k
Unfortunately I never found part Three. If you do please post the link :P
Best Regards
Francis
---------------------------

Le mar. 12 févr. 2019 à 17:28, John, G4DRS via Groups.Io <g4drs=btinternet.com@groups.io> a écrit :
This is an interesting topic to me, as an old dinosaur.
I have a Yaesu transceiver with an SDR tuned to the 9MHz IF plugged into the IF out terminal, used as a panadaptor. It works really well.
However, It's my only experience of an SDR, so I don't know whether it works really well compared to the previous panadaptor I had (i.e. nothing), or whether it works really well in an absolute frame of reference.
I know (I think) roughly what makes a good superhet, after 45 years of absorbing knowledge by osmosis, even if I am not great at articulating it. I know little or nothing about what makes the difference between a good SDR and a bad one.
I do have an RTL8532(is that the right number?) dongle, but I have hardly even plugged it in. 
My guess is that the RTL probably qualifies as a really bad SDR, but I don't know for sure. Indeed, if it does, I have no idea what makes it so compared to my other one (a Radiokits Hunter), or even where the Hunter sits in the hierarchy of SDR quality.
According to Mr. Sherwood, my old FTdx5000 still ranks pretty high in the receiver performance lists, but I don't see RSP1A, etc. in the list, so I'm none the wiser.

Is there an easy way to explain it all to a humble mechanical engineer like myself?


John
G4DRS


Re: Predistortion

Klaus DK7XL
 

Ed,

you are right - I am missing indicators as well - especially feedback level - this is a must have. However - predistortion is at least working like I have outlined previously. Try ist yourself and change feedback level even up to +/- 20dB and you will notice at the 3-layer spectrum display how output IMD (blue graph) is varying according to feedback level variance.

Let us monitor what Simon will further do here and enjoy his splendid work.

73 - Klaus, DK7XL


Re: SDR Receiver Recommendations

John, G4DRS <g4drs@...>
 

This is an interesting topic to me, as an old dinosaur.
I have a Yaesu transceiver with an SDR tuned to the 9MHz IF plugged into the IF out terminal, used as a panadaptor. It works really well.
However, It's my only experience of an SDR, so I don't know whether it works really well compared to the previous panadaptor I had (i.e. nothing), or whether it works really well in an absolute frame of reference.
I know (I think) roughly what makes a good superhet, after 45 years of absorbing knowledge by osmosis, even if I am not great at articulating it. I know little or nothing about what makes the difference between a good SDR and a bad one.
I do have an RTL8532(is that the right number?) dongle, but I have hardly even plugged it in. 
My guess is that the RTL probably qualifies as a really bad SDR, but I don't know for sure. Indeed, if it does, I have no idea what makes it so compared to my other one (a Radiokits Hunter), or even where the Hunter sits in the hierarchy of SDR quality.
According to Mr. Sherwood, my old FTdx5000 still ranks pretty high in the receiver performance lists, but I don't see RSP1A, etc. in the list, so I'm none the wiser.

Is there an easy way to explain it all to a humble mechanical engineer like myself?


John
G4DRS


Lime SDR and PTT out #poll

 

HI,

I am new to this group.

I have tried a lime sdr (usb 3) with sdr console and it works.
A small amp with a 2n 5109 gives me 3 watt output.
But it does not have a ptt out so I have to switch manualy from rx to tx the antennab relais.

In openhpsdr  ( I use that with an Anan 200d and a redpitaya) there is a CAT possibility for PTT.
a simple usb to serial port cable gives switching dsr to - 9 and + nine volts. 
My question to Simon is now is it possible to implement that in SDRconsole v3.

Thanks for answering in advance.

Onno  (callsign PA0ONO)


Results

See Who Responded


Re: SDR Receiver Recommendations

Italo Crivellotto
 

Senza indugi ;  Elad FDM-S2,    oppure RX DUO ..oppure la pietra miliare del SDR :  il Perseus .
Tutti e 3 (+ SdrPlay) funzionano benissimo con Sdr Console 
73
De IK3UMZ


Re: #RTL SDR dongle runing in Direct Sampling mode #rtl

Bernard Wehrli
 

Hello All 

I finally managed that SDR Console works in direct sampling Mode with my Realtek RTL 2838UHIDIR stick. 
I followed strictly the instruciotns given in the Link:
http://www.rtl-sdr.com/new-rtl-sdr-drivers-and-extio-available-bias-tee-support-and-direct-sampling-for-sdr-console/
… and it finally worked. However there are some tricky things to be aware of. Here some additional info how I made it to work in my case:

1: Download the files according to the instructions in the link above.
2: In order to identify the USB stick, you HAVE TO start the program " RtlSdr Catalog.exe" prior to start the SDR Console.This program is part of the files you are told in above link  to copy from the downloade site into the folder where the SDR Console program is stored.
3. Start SDR Console, go to the "Home" tab and klick on "Select Radio".  A new window opens.
4: Klick on "Definitions"  and then klick on "Search". Here you should find now  "RTL SDR (FULL)". Select it and add it to the Radio Definition table.
5:. Select the newly loaded RTL Radio Definition. On the right side of the table you find the DLL info " RTL SDR (FULL) " again.
6: Klick "Save" . You will be back on the window  "Select Radio".
7: Select again the newly installed RTL Dongle and klick on "Start".  By now, the SDR Console should show at least a noise floor.
8: Then go to the "Home" tab of the SDR Console program and select "Radio Configuration"
9: A window called " RTL SDR (Full)" should opens. Select " Set Tuner Modes".
10: In the field " Direct Sampling" on the upper right you can now select "Q-Channel"

It might be that next time, when you restart your Computer again, that SDR Console doesn't find the RTL stick anymore. In such a case start the program " RtlSdrCatalog.exe" again before you start the SDR Console. 
If that happens regularly, it would be usefull to make a short Batch program to start the two programs in the right sequence automatically.

I hope this guide is helpfull for any other user of RTL sicks which are able to operate in the direct sampling mode. 

73 de Bernard, HB9ALH


Re: SDR Receiver Recommendations

Mark Cayton <mcayton@...>
 

I have the RSP1, RSP2 and RSP1A (I just sold the RSP1 two weeks ago).  With an adequate pre-filter on the input I can detect very little difference in performance between any of those radios. I get awesome performance receiving HF on the RSP2, feeding my 80/40 fan dipole into the hi-Z input thru a Nooelec 1:9 Tiny Balun installed backwards:

https://drive.google.com/file/d/0B77dlHbMDWmJU2NlOG12c1RIb1k/view?usp=sharing

https://drive.google.com/file/d/0B77dlHbMDWmJYXc2LUgxa3VGN2VmSkdzZXdCZ014ZGt2LURr/view?usp=sharing

And the RSP1A performs admirably on BCAM even when dealing with very strong signals:

https://drive.google.com/file/d/1Y6uTghDkdUIA1hEnc2CZpwUjA1FapnNr/view?usp=sharing

Carry on,

Mark  K1LSB


Re: Predistortion

Edward Clark <edclarkiv1@...>
 

I get zero indications that predistortion is working. There are no controls or indicators pertaining to predistortion.

I’m guessing it just hasn’t been gotten to yet.

Thanks,
Ed

Sent from my iPhone, apologies for any missed auto corrections and typos!


Re: SDR Receiver Recommendations

Jon Hudson
 

Thanks Ray..  no worries- you were clear... it’s just we know that the RSP1A shouldn’t be behaving worse and we’d like to understand what’s happening.   

Best 73, Jon


On 12 Feb 2019, at 10:11, Ray Lyford <ancient_brit@...> wrote:

Jon 
        OK I will do that for you. It's not a deal killer and I hope I made that very clear.

Ray

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Jon Hudson <jon.hudson@...>
Sent: 12 February 2019 09:23
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] SDR Receiver Recommendations
 
Ray.  It would be good if you could open up a support ticket on www.sdrplay.com/support explaining your set-up and showing comparisons because this is not something that we would expect.

Many thanks, Jon 


On 12 Feb 2019, at 08:20, Ray Lyford <ancient_brit@...> wrote:

It's too easy to keep buying new gear and often we just don't need it because it not better than what we have already. 

I have had the SDRplay RSP for good time now. It's a great little SDR and a good price. I like to watch the LF and VLF bands. The RSP can do it but it's not made for that band.
SDRPlay  Announced the RSP1a it has LF VLF. I bought one. It's on my shelf and it's is also a good cheap SDR. It's on the shelf because the earlier RSP performs much better for me on LF and VLF.  Lesson learnt.  Was I robbed, no because it's still a good SDR.

Want an example of better. The older SDR receives and decodes the Pinneberg RTTY weather on 147Khz. My newer RSP1a struggles to see the station let alone being able to decode the audio from it. The first question should be will it do something I need that my old radio cannot do. If the answer is no go by some flowers for your wife and tell her you bought her flowers instead.












 




From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Jon Hudson <jon.hudson@...>
Sent: 11 February 2019 22:24
To: main@sdr-radio.groups.io
Subject: Re: [SDR-Radio] SDR Receiver Recommendations
 
The RSP2pro has multiple antenna ports and external clock in and out, plus is housed in a rugged steel case.  But for single antenna use the RSP1A compares very well at a significantly lower price.


On 11 Feb 2019, at 17:11, Bo Barry <bobarr@...> wrote:

So why is it better than the RSP2 PRO that I'm enjoying so much? 
Older is better! Got it! Wishing I still had my '54 Chevy!
--
Bo W4GHV since '54


Re: Interference

Dennis Fitch
 

Thanks for that Graham, I did actually try that a while ago, interference was still present, My next door neighbour leaves his HP printer on 24/7, I'm wondering if that could be the culprit.

--
Dennis  G8IMN