Hi Stepan,

The huge capacitor C86 on the bias voltage can cause a high current peak through T4, therefore is better to get the bias from a simple 1:2 voltage divider.

This reduce also the sensivity for transients and noise on Vsupply from the USB host.

Furthermore the variable bias voltage is nearly unused from the 99% of users and can cause little spures about 70 kHz.

>>It can be solved by adding RF transformer between antenna and PMSDR, but in this case I can not use internal Switchboard (transmitting through the PMSDR).
>>Is the solution to insert AF transformers into I and Q lines between PMSDR and PC soundcard???
Probaly yes. You can check this with a surplus transformer from a old PSTN modem on one channel (I or Q). If the result is ok, then you can evaluate to buy a couple of high quality AF-transformers.

About the AF-transformers, i suggest to read this page: http://www.cliftonlaboratories.com/softrock_lite_6_2.htm

So i suggest to use the TRAID SP-70 as isolation between PMSDR and PC soundcard. A audio galvanic isolator kit  will be available within next week.

Regards,

Martin

---

Da: ok1css <ok1css@...>
A: pmsdr@...
Inviato: Lunedì 7 Novembre 2011 21:55
Oggetto: [pmsdr] Re: Updated PMSDR modification

 

Hi Martin,
please can you go deep into the technical detail? What is benefit from bias fixed on Vsupply? How is it connected with central beat?

One more question. I successfuly solved the zero beat issue by using USB isolator, but as soon as I connect grounded antena (vertical) the very big central beat appears, probably due to ground loop hum between PC and grounded antenna.
It can be solved by adding RF transformer between antenna and PMSDR, but in this case I can not use internal Switchboard (transmitting through the PMSDR).
Is the solution to insert AF transformers into I and Q lines between PMSDR and PC soundcard??? I'm woried about some phase distortion on this transformers....
Any experiences, hints, ideas?

Thank you in advance!
BR
Stepan

--- In pmsdr@..., Martin Pernter <iw3aut@...> wrote:
>
Hi,
This mod disable the variable QSD bias voltage and fix this voltage to Vsupply/2.
Martin

The mod kit is available by rf systems . :-)
I wil order 2 kits , you never now.

The audio isolator kit is olso available, you have to pay for quality.
Too bad there is a heat shrink as housing concubine.
Perhaps that comes later.

Keep up the good work.
Thanks






--- In pmsdr@..., Martin Pernter <iw3aut@...> wrote:
>
> Hi Stepan,

>
> The huge capacitor C86 on the bias voltage can cause a high current peak
through T4, therefore is better to get the bias from a simple 1:2 voltage
divider.
> This reduce also the sensivity for transients and noise on Vsupply from the
USB host.
>
> Furthermore the variable bias voltage is nearly unused from the 99% of users
and can cause little spures about 70 kHz.
> >>It can be solved by adding RF transformer between antenna and PMSDR, but in
this case I can not use internal Switchboard (transmitting through
> the PMSDR).
> >>Is the solution to insert AF transformers into I and Q lines between PMSDR
and PC soundcard???
> Probaly yes. You can check this with a surplus transformer from a old PSTN
modem on one channel (I or Q). If the result is ok, then you can evaluate to buy
a couple of high quality AF-transformers.
>
>
> About the AF-transformers, i suggest to read this page:
http://www.cliftonlaboratories.com/softrock_lite_6_2.htm
> So i suggest to use the TRAID SP-70 as isolation between PMSDR and PC
soundcard. A audio galvanic isolator kit  will be available within next week.
>
> Regards,
> Martin
>
>
>
>
> >________________________________
> >Da: ok1css <ok1css@...>
> >A: pmsdr@...
> >Inviato: Lunedì 7 Novembre 2011 21:55
> >Oggetto: [pmsdr] Re: Updated PMSDR modification
> >
> >
> > 
> >
> >Hi Martin,
> >please can you go deep into the technical detail? What is benefit from bias
fixed on Vsupply? How is it connected with central beat?
> >
> >One more question. I successfuly solved the zero beat issue by using USB
isolator, but as soon as I connect grounded antena (vertical) the very big
central beat appears, probably due to ground loop hum between PC and grounded
antenna.
> >It can be solved by adding RF transformer between antenna and PMSDR, but in
this case I can not use internal Switchboard (transmitting through the PMSDR).
> >Is the solution to insert AF transformers into I and Q lines between PMSDR
and PC soundcard??? I'm woried about some phase distortion on this
transformers....
> >Any experiences, hints, ideas?
> >
> >Thank you in advance!
> >BR
> >Stepan
> >
> >--- In pmsdr@..., Martin Pernter <iw3aut@> wrote:
> >>
> >Hi,
> >This mod disable the variable QSD bias voltage and fix this voltage to
Vsupply/2.
> >Martin
> >
> >
> >
> >
> >
>

http://air-radiorama.blogspot.com/2011/11/nuovo-software-open-source-per-la.html

Good Evening All,
Things were going along well... I am now having a problems. A bit of info to
provide some thought.

Win XP Pro Service Pack 3.
2.5 GB Ram
2.09 Athlon XP Processor
WinRad 1.6.1 Build 116

Everything was working well until tonight. I had some XP updates to complete and
let them run. It appears something in the update has caused me some problems.

What have I done.
1. I reinstalled WinRad, still received the error.
2. Removed PMSDR files from the WinRad folder. When the files are not there in
the WinRad folder WinRad starts fine, no errors.
3. Added PMSDR files back into the WinRad folders and the errors occur again.
  a. Used PMSDR files from PMSDR_DLL_V35r1 and PMSDR_DLL_V36r1. Does not matter.
Errors occur with files from either DLL version.

Anyone else had these problems?

Thanks,
N8SKB

Martin,
  any chance that the soundcard transformer kit could be provided without the
sp-70 devices in order that it will have a more realistic postage rate to the UK
(as it's price will fall under the 25 Euro)?
I don't think it is reasonable to pay over 28 Euro to post such a small kit that
in itself only costs 48 Euro.
The new shipping option is fine but has a limit based on price (25 Euro) and not
on size/weight.
I can obtain the SP-70 from a UK comapny at a reasonable rate.

Keith

Martin,

I would like to second this. With the kit in a jiffy bag, it would cost 2 or 3
euros to post a similar package from the UK to Italy.

Cheers,

Nick.




--- In pmsdr@..., "keithtaylor_56" <keithtaylor_56@...> wrote:
>
> Martin,
>  any chance that the soundcard transformer kit could be provided without the
sp-70 devices in order that it will have a more realistic postage rate to the UK
(as it's price will fall under the 25 Euro)?
> I don't think it is reasonable to pay over 28 Euro to post such a small kit
that in itself only costs 48 Euro.
> The new shipping option is fine but has a limit based on price (25 Euro) and
not on size/weight.
> I can obtain the SP-70 from a UK comapny at a reasonable rate.
>
> Keith
>

Hello,

I have my PMSDR frequency calibrated nicely via the PMSDR utility's advanced
settings using HDSDR. But I have a residual 28Hz frequency error when using
SDR-Radio, the 4,996KHz time signal appears on 4,995.972KHz.

Could someone tell me how to correct this please - I've been round and round in
SDR-Radio's configuration menus, but can't see how to achieve this.

Great piece of kit Martin! Moving to an E-MU 0202 with good quality cables made
an enormous difference.

Cheers,

Nick.

Thanks Martin, I will be happy to order the kit with the new shipping cost of 4
Euro to the UK. Don't mind a 2 week delivery.
Great product and great support.
Thanks again.

Keith

--- In pmsdr@..., Martin Pernter <iw3aut@...> wrote:
>
> Hi,
>
> i can raise the limit of 25 Euro to 50 Euro for the new shipping option. This
isn't a problem for me, but the standard postage shipping have no warranty for
the delivery. Other shipping options to outside Italy of the italian postal
service are to expensive for my opinion. No comments about the services and
waiting times in our postal offices......:(
> Usually, there are no problems with the delivery, but only with the delivery
time.
>
>
> The soundcard galvanic isolator kit will remain available only as complete
kit.
>
> Another important note: due to (italian) tax laws isn't possible to sell
V.A.T. tax free to customers outside of the EC for orders with a total amount
below 154,94 Euro.
>
>
> Best Regards,
> Martin
>
>
>
>
> >________________________________
> >Da: keithtaylor_56 <keithtaylor_56@...>
> >A: pmsdr@...
> >Inviato: Sabato 12 Novembre 2011 14:23
> >Oggetto: [pmsdr] Partial soundcard kit or cheaper postage
> >
> >
> > 
> >Martin,
> >any chance that the soundcard transformer kit could be provided without the
sp-70 devices in order that it will have a more realistic postage rate to the UK
(as it's price will fall under the 25 Euro)?
> >I don't think it is reasonable to pay over 28 Euro to post such a small kit
that in itself only costs 48 Euro.
> >The new shipping option is fine but has a limit based on price (25 Euro) and
not on size/weight.
> >I can obtain the SP-70 from a UK comapny at a reasonable rate.
> >
> >Keith
> >
> >
> >
> >
> >
>

Hi Martin and all PMSDR users!

Inspired by new SP-70 tranformer kit from Martin I bought just cheap 1:1
(600ohm/600ohm) AF transformers (2 EUR/pc) for testing.

The PMSDR works well with this transformers inserted into I/Q signal. On the
first look there is no quality or sensitivity difference even with 196k sampling
rate, but it needs more testing for final results.

What is funny, but logical - instead central "yelow" line (beat) there is now
"black gap". This gap is around 2mm on my screen with 96k sample rate.
My explanation for this is, that this is caused because of missing transfer of
lowest frequencies (DC to lowest AC transferable freq.)
Am I right?

Is this effect visible also with SP-70 transformers?

Thaks!
BR Stepan

Hi all,my very new setup is a PMSDR + switchboard and a Yaesu FT 950.
When I trasmit with the RTX I listen my voice echo in the headphone.
There some RF loop in my setup or I have to configure something in the setting
of the PMSDR por soundcard?

Thnak you very much
Lorenzo, IN3EJN

A new free release of WRplus, 1.07 is available for download from www.wrplus.altervista.org .

This was unplanned but… Studio 1, the new application that will replace WRplus is still under development; as WRplus 1.06 expires at the end of November, a new release, 1.07 is available for download. I've received several emails about Studio 1: please be patient, I'm working hard to have the application ready as soon as possible.

Here in short the new features, modifications and corrections:

• Efficiency improvements in FM wide mode

• Slight improvements in SSB – ECSS audio quality

Please read the updated User Guide and the history.txt file before posting questions.

As always feedbacks and comments are welcome.

Thanks to all for the feedbacks and advices.

Sandro Sfregola

Thank`s for this.
For me you can make this as a paid version .
I really mean that.:-)

Are there screenshot`s for the new version of studio 1 ?

73, Michiel NLD



--- In pmsdr@..., "Sandro" <badplayer64@...> wrote:
>
>
> A new free release of WRplus, 1.07 is available for download from
> www.wrplus.altervista.org <http://www.wrplus.altervista.org/>  .
>
> This was unplanned but… Studio 1, the new application that will
> replace WRplus is still under development; as WRplus 1.06 expires at the
> end of November, a new release, 1.07 is available for download. I've
> received several emails about Studio 1: please be patient, I'm
> working hard to have the application ready as soon as possible.
>
> Here in short the new features, modifications and corrections:
>
>     * Efficiency improvements in FM wide mode
>
>     * Slight improvements in SSB – ECSS audio quality
>
> Please read the updated User Guide and the history.txt file before
> posting questions.
>
> As always feedbacks and comments are welcome.
>
> Thanks to all for the feedbacks and advices.
>
> Sandro Sfregola
>

Hi

Someone already noticed the updates from WR-plus and HDSDR last week?

grts,
John

Hi Martin,

Since version 3.6 of the dll, you can not change the value of the filter.
In version 3.5, this could still be.
will this back in the new dll ?
I really do miss this feature.

73, Michiel

Hi Martin,

Ok clear, i have edit the extio pmsdrdll.ini en works good again for me.

73, Michiel

--- In pmsdr@..., Martin Pernter <iw3aut@...> wrote:
>
> Hi,
>
> since the DLL version 3.6 these values can be changed only through the
extio_pmsdr.ini.
> I have change this to avoid problems with accidentaly wrong user settings.
>
>
> 73
> Martin
>
>
>
>
> >________________________________
> > Da: Michiel <michielasha@...>
> >A: pmsdr@...
> >Inviato: Mercoledì 14 Dicembre 2011 19:21
> >Oggetto: [pmsdr] Filter valeu DLL 3.6x
> >
> >
> > 
> >Hi Martin,
> >
> >Since version 3.6 of the dll, you can not change the value of the filter.
> >In version 3.5, this could still be.
> >will this back in the new dll ?
> >I really do miss this feature.
> >
> >73, Michiel
> >
> >
> >
> >
> >
>

Hello

Now my PMSDR and SDR-RADIO.com works together without any dll plugin...

But i got the problem that the bandpassfilters do not switch! I have to switch
it to passtrought bevore i use sdr-radio.com
If i open the CFGSR SI570 Tool it say that this hardware has no ABPF.
Maybe the problem is because the pmsdr in si570 usb mode does not report any
bandpassfilters...

did somebody got a similar setup to work incl. the Filters?

hope that somebody have any solution for me!

thanks in advance!

HB3YLP
Yves

Happy new year 2012 to all PMSDR FANS
; )

To you and your loved ones Happy New Year 2012

Wishing you a Happy 2012 to ALL ......" The little bird "..told me in a dream
that this year comes the TX card .... I HOPE THERE  .....
73 Sergio ik3ery