I just received my kit yesterday.

I found that the L1 lead, not the body which goes to gnd, was
shorted
to the gnd plane on the bottom side of the board.  I used an xacto
knife to cut the bridge.  This was not a solder bridge.  I did not
use
that pad for fear of a solder bridge to gnd.  I used the antenna pad
instead.

Check with an ohm meter before installing L1, the larger pad
(antenna
input) just above the silk screen that says C21 for no continuity to
gnd.

I had several wrong installs of the thru hole parts because I was
not
careful to pay good attention to the silk screen and the small
oriention line between the body of the resistor and it's other lead.

Good luck,

Marsh, NC7V

I read Bill, KD5TFD'S comments in the AMQRP Future directions.  I
wanted to do something similar.  Be careful of the reference
designators!  They are from a previous version of the PCB/schematic
and some have changed.  His R18 (from version 3.1) is now R2 which is
the LED current limiting resistor.  I left it in. I put my 12v input
header in place of R1.  C2 is shorted to gnd. R1 is the same, but
replaced by the input voltage header..  C8 is the same.  His R2 is now
R3, 5volts to Q2.

I haven't finished my soft rock yet.  Spent too much time on my L1 gnd
short.

Marsh, NC7V

Hi all,

Just new to the group.

Does anybody experience interference from the PC on 40 meters?

What about noise and garbage on the 5 V USB line?

73 Rein W6/PA0ZN

http://www.nitehawk.com/linrad_dat/

Got my unit operational this afternoon!  I am using the internal Xtal
at this time. Hope to hook the DDS up soon. Now to learn how to use
PowerSDR properly.

Marsh, NC7V

--- In softrock40@yahoogroups.com, "observer35" <rein0zn@i...> wrote:
> Hi all,
>
> Just new to the group.
>
> Does anybody experience interference from the PC on 40 meters?

Not me.  Either with the SoftRock or my other rigs.
>
> What about noise and garbage on the 5 V USB line?

I elected to put a 78L05 in place of Q1 so I can't comment on that.
Marsh, NC7V
>
> 73 Rein W6/PA0ZN
>
> http://www.nitehawk.com/linrad_dat/

Hi Rein,

I have built about 25 of the v4.0 SoftRock40 receivers and find the PC
noise does not cause much of a problem.  When the receiver is
calibrated to S9, (-73 dBM, 50 uV RMS), the baseline is around -135
dBm with 10-15 dB spikes riding on the baseline every 1 kHz or so.
Also at the LO frequency, around 7.054-7.056 MHz there is a large
broad spike associated with the LO and the fact that the soundcard
contributes lots of noise near zero frequency.

I will be quite interested in the experience of SoftRock40 builders as
they finish their kits.  If I can help with problems in getting the
little receive running, I would be happy to do so.

73,
Tony KB9YIG

--- In softrock40@yahoogroups.com, "observer35" <rein0zn@i...> wrote:
> Hi all,
>
> Just new to the group.
>
> Does anybody experience interference from the PC on 40 meters?
>
> What about noise and garbage on the 5 V USB line?
>
> 73 Rein W6/PA0ZN
>
> http://www.nitehawk.com/linrad_dat/

Hi Tony,


Thanks for your reply. From looking to the picture on one off the
softrock pages
I got the idea that the board was directly plugged into an USB connector
of the
computer. Looking more careful it seems the board is running from an USB
cable connector?
My question was more in general, not softrock specific.  I was surprised
to see an unshielded
front-end that close to a PC

I have been playing quite a bit with Linrad Spectran dspblaster etc just
running off a TS 850 at least
30 ft from the PC and I get all kinds of  stuff from the computer. In
fact it means that I will have to
put the computer in a second box with all inputs and outputs well
decoupled I think. This is just
monitoring basically antenna noise.

I am expecting a board shortly and will let you know,  using the Delta44
sound card.

73 Rein  W6/PA0ZN

kb9yig wrote:

> Hi Rein,
>
> I have built about 25 of the v4.0 SoftRock40 receivers and find the PC
> noise does not cause much of a problem.  When the receiver is
> calibrated to S9, (-73 dBM, 50 uV RMS), the baseline is around -135
> dBm with 10-15 dB spikes riding on the baseline every 1 kHz or so.
> Also at the LO frequency, around 7.054-7.056 MHz there is a large
> broad spike associated with the LO and the fact that the soundcard
> contributes lots of noise near zero frequency.
>
> I will be quite interested in the experience of SoftRock40 builders as
> they finish their kits.  If I can help with problems in getting the
> little receive running, I would be happy to do so.
>
> 73,
> Tony KB9YIG
>
> --- In softrock40@yahoogroups.com, "observer35" <rein0zn@i...> wrote:
> > Hi all,
> >
> > Just new to the group.
> >
> > Does anybody experience interference from the PC on 40 meters?
> >
> > What about noise and garbage on the 5 V USB line?
> >
> > 73 Rein W6/PA0ZN
> >
> > http://www.nitehawk.com/linrad_dat/
>
>
>
> ------------------------------------------------------------------------
> YAHOO! GROUPS LINKS
>
>     *  Visit your group "softrock40
>       <http://groups.yahoo.com/group/softrock40>" on the web.
>
>     *  To unsubscribe from this group, send an email to:
>        softrock40-unsubscribe@yahoogroups.com
>       <mailto:softrock40-unsubscribe@yahoogroups.com?subject=Unsubscribe>
>
>     *  Your use of Yahoo! Groups is subject to the Yahoo! Terms of
>       Service <http://docs.yahoo.com/info/terms/>.
>
>
> ------------------------------------------------------------------------
>

--- In softrock40@yahoogroups.com, "Marsh Parker" <nc7v@e...> wrote:
> --- In softrock40@yahoogroups.com, "observer35" <rein0zn@i...> wrote:
> > Hi all,
> >
> > Just new to the group.
> >
> > Does anybody experience interference from the PC on 40 meters?
>
> Not me.  Either with the SoftRock or my other rigs.
> >
> > What about noise and garbage on the 5 V USB line?
>
> I elected to put a 78L05 in place of Q1 so I can't comment on that.

The supply from the USB connector is 5V. Are you using a separate power
supply?

Leon

Hi Rein,

Actually I just plug my SoftRock into the USB socket on the front of
my Dell 2400 machine. The little receiver plays quite nicely that
way and others have had the same results with various computers.  As
I write this, I have a SoftRock playing on the same PC.  Forty
meters this morning at my QTH shows a flexuating base noise level of
about -122 dBm and the peaks of the soundcard related spikes are
visible to about -118 dBm.  S5 signals are at about -110 dBm. Tuning
around I find an S3 signal that is still good copy.

I continue to be amazed at how well PowerSDR software and a simple
receiver circuit work together to make a nice little receiver.

73,
Tony KB9YIG

--- In softrock40@yahoogroups.com, "Rein A. Smit" <rein0zn@i...>
wrote:
> Hi Tony,
>
>
> Thanks for your reply. From looking to the picture on one off the
> softrock pages
> I got the idea that the board was directly plugged into an USB
connector
> of the
> computer. Looking more careful it seems the board is running from
an USB
> cable connector?
> My question was more in general, not softrock specific.  I was
surprised
> to see an unshielded
> front-end that close to a PC
>
> I have been playing quite a bit with Linrad Spectran dspblaster
etc just
> running off a TS 850 at least
> 30 ft from the PC and I get all kinds of  stuff from the computer.
In
> fact it means that I will have to
> put the computer in a second box with all inputs and outputs well
> decoupled I think. This is just
> monitoring basically antenna noise.
>
> I am expecting a board shortly and will let you know,  using the
Delta44
> sound card.
>
> 73 Rein  W6/PA0ZN
>
> kb9yig wrote:
>
> > Hi Rein,
> >
> > I have built about 25 of the v4.0 SoftRock40 receivers and find
the PC
> > noise does not cause much of a problem.  When the receiver is
> > calibrated to S9, (-73 dBM, 50 uV RMS), the baseline is around -
135
> > dBm with 10-15 dB spikes riding on the baseline every 1 kHz or
so.
> > Also at the LO frequency, around 7.054-7.056 MHz there is a large
> > broad spike associated with the LO and the fact that the
soundcard
> > contributes lots of noise near zero frequency.
> >
> > I will be quite interested in the experience of SoftRock40
builders as
> > they finish their kits.  If I can help with problems in getting
the
> > little receive running, I would be happy to do so.
> >
> > 73,
> > Tony KB9YIG
> >
> > --- In softrock40@yahoogroups.com, "observer35" <rein0zn@i...>
wrote:
> > > Hi all,
> > >
> > > Just new to the group.
> > >
> > > Does anybody experience interference from the PC on 40 meters?
> > >
> > > What about noise and garbage on the 5 V USB line?
> > >
> > > 73 Rein W6/PA0ZN
> > >
> > > http://www.nitehawk.com/linrad_dat/
> >
> >
> >
> > -----------------------------------------------------------------
-------
> > YAHOO! GROUPS LINKS
> >
> >     *  Visit your group "softrock40
> >       <http://groups.yahoo.com/group/softrock40>" on the web.
> >
> >     *  To unsubscribe from this group, send an email to:
> >        softrock40-unsubscribe@yahoogroups.com
> >       <mailto:softrock40-unsubscribe@yahoogroups.com?
subject=Unsubscribe>
> >
> >     *  Your use of Yahoo! Groups is subject to the Yahoo! Terms
of
> >       Service <http://docs.yahoo.com/info/terms/>.
> >
> >
> > -----------------------------------------------------------------
-------
> >

I'm brand spankin' new to the group so didn't see the original thread.

Expecting a sensitive receiver to operate just inches away from a
wideband noise source is optimistic (IMHO). For best results, it
needs shielding just like any other receiver and or transmitter does.

Computer noise might not show up as clean carriers or be identifiable
by tuning across the band. It appears as an elevated noise floor most
of the time, which sounds like background noise. I'm sure many people
have interference from their own computers and most don't even
realize it's there because it sounds rather like normal atmospheric noise.

For absolute best results, shield it. For casual listening on a
crowded band, don't worry about it and run it as supplied.

My softrock-40 is going on LF when I get it and it will be located
away from the computer and shielded. Switching supplies, florescent
lamps and computer interference is pretty severe at 190 kHz and I
want to have good reception. I'm even considering magnetic shielding
due to the nature of the interference at these frequencies.

Regards,

Art





>The supply from the USB connector is 5V. Are you using a separate power
>supply?


--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005

I have my softrock 40 running.  It's plugged into an external USB hub for
power, and hooked up to my B & W broadband folded dipole.  I can find no
birdies within it's limited tuning range - 7.030 to 7.080 as specified in
the AMQRP info.  It is extremely sensitive, and copies signals within that
range as well as my K2 does, and that's saying something.  The K2 has by far
the best receiver of any rig I've ever owned.

All this talk about computer birdies and pc noise is pretty much unfounded.
There is NO noise apparent with the scope on the DC voltage line coming from
the USB port.

The computer is a Dell Dimension 8100, Pentium IV @ 1.4GHz and even with the
covers off, I still cannot find any birds attributable to the computer.

I AM using just the bare-bones, unsupported SoundBlaster PCI sound card
that's built into the Dell's motherboard.  It performs adequately for the
Soft Rock 40, but I would presume to say that if one had an SDR-1000, this
card would definitely be struggling.  My sampling rate is only 48 KHz, and
it still does very well.

Maybe this will allay some of the fears I see expressed here on the
reflector.

What the heck do you expect for $23 bucks a full blown SDR-1000?  Jeez,
lighten up and experiment with the thing! It works as advertised, and maybe
even better considering the low end sound card I'm using.

Jim - W0EB

OK, this person has experience, my views are different and contrary
to this persons real life observations.

Apparently there is no interference when operating the softrock-40
without shielding. Congrats to the designers of the softrock-40,
they've managed to do something never before done in the history of
receiver design.

However, I've never seen a high quality receiver made available in a
plastic enclosure..............

GL to all.

Art

At 12:47 PM 9/18/2005, you wrote:

>I have my softrock 40 running.  It's plugged into an external USB hub for
>power, and hooked up to my B & W broadband folded dipole.  I can find no
>birdies within it's limited tuning range - 7.030 to 7.080 as specified in
>the AMQRP info.  It is extremely sensitive, and copies signals within that
>range as well as my K2 does, and that's saying something.  The K2 has by far
>the best receiver of any rig I've ever owned.
>
>All this talk about computer birdies and pc noise is pretty much unfounded.
>There is NO noise apparent with the scope on the DC voltage line coming from
>the USB port.
>
>The computer is a Dell Dimension 8100, Pentium IV @ 1.4GHz and even with the
>covers off, I still cannot find any birds attributable to the computer.
>
>I AM using just the bare-bones, unsupported SoundBlaster PCI sound card
>that's built into the Dell's motherboard.  It performs adequately for the
>Soft Rock 40, but I would presume to say that if one had an SDR-1000, this
>card would definitely be struggling.  My sampling rate is only 48 KHz, and
>it still does very well.
>
>Maybe this will allay some of the fears I see expressed here on the
>reflector.
>
>What the heck do you expect for $23 bucks a full blown SDR-1000?  Jeez,
>lighten up and experiment with the thing! It works as advertised, and maybe
>even better considering the low end sound card I'm using.
>
>Jim - W0EB
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>
>--
>No virus found in this incoming message.
>Checked by AVG Anti-Virus.
>Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005


--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005

Art and all,
You missed the point I was making - there are no birdies noted within the
limited tuning range provided.  This thing, as built will ONLY tune from
7.030 to 7.080.  It was not designed as a complete receiver that covers the
entire band.  I'm absolutely certain there would be junk received outside of
that range were it able to tune there.

Plastic enclosure?  What enclosure.  Mine is operating on the desk as a
bare, unshielded board.  The only shielding involved is the coax to the
antenna and the shielded audio cable from the I-Q output on the board to the
Line input on the sound card.

The enclosure is not supplied with this simple kit.  If you want to put it
in an altoids can or any other metallic enclosure, this is easily done,
subject to whatever your imagination can devise.

I'm merely stating that it OPERATES AS ADVERTISED by the designer.

W0EB

> -----Original Message-----
> From: softrock40@yahoogroups.com
> [mailto:softrock40@yahoogroups.com] On Behalf Of KY1K
> Sent: Sunday, September 18, 2005 12:07 PM
> To: softrock40@yahoogroups.com
> Subject: RE: [softrock40] Re: Interference from PC?
>
>
> OK, this person has experience, my views are different and contrary
> to this persons real life observations.
>
> Apparently there is no interference when operating the softrock-40
> without shielding. Congrats to the designers of the softrock-40,
> they've managed to do something never before done in the history of
> receiver design.
>
> However, I've never seen a high quality receiver made available in a
> plastic enclosure..............
>
> GL to all.
>
> Art
>
> At 12:47 PM 9/18/2005, you wrote:
>
> >I have my softrock 40 running.  It's plugged into an
> external USB hub
> >for power, and hooked up to my B & W broadband folded dipole.  I can
> >find no birdies within it's limited tuning range - 7.030 to 7.080 as
> >specified in the AMQRP info.  It is extremely sensitive, and copies
> >signals within that range as well as my K2 does, and that's saying
> >something.  The K2 has by far the best receiver of any rig I've ever
> >owned.
> >
> >All this talk about computer birdies and pc noise is pretty much
> >unfounded. There is NO noise apparent with the scope on the
> DC voltage
> >line coming from the USB port.
> >
> >The computer is a Dell Dimension 8100, Pentium IV @ 1.4GHz and even
> >with the covers off, I still cannot find any birds
> attributable to the
> >computer.
> >
> >I AM using just the bare-bones, unsupported SoundBlaster PCI
> sound card
> >that's built into the Dell's motherboard.  It performs
> adequately for
> >the Soft Rock 40, but I would presume to say that if one had an
> >SDR-1000, this card would definitely be struggling.  My
> sampling rate
> >is only 48 KHz, and it still does very well.
> >
> >Maybe this will allay some of the fears I see expressed here on the
> >reflector.
> >
> >What the heck do you expect for $23 bucks a full blown
> SDR-1000?  Jeez,
> >lighten up and experiment with the thing! It works as
> advertised, and
> >maybe even better considering the low end sound card I'm using.
> >
> >Jim - W0EB
> >
> >
> >
> >
> >
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >--
> >No virus found in this incoming message.
> >Checked by AVG Anti-Virus.
> >Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date:
> >9/16/2005
>
>
> --
> No virus found in this outgoing message.
> Checked by AVG Anti-Virus.
> Version: 7.0.344 / Virus Database: 267.11.1/104 - Release
> Date: 9/16/2005
>
>
>
>
> ------------------------ Yahoo! Groups Sponsor
> --------------------~-->
> Get fast access to your favorite Yahoo! Groups. Make Yahoo!
> your home page
> http://us.click.yahoo.com/dpRU5A/wUILAA/yQLSAA/b9A1lB/TM
> --------------------------------------------------------------
> ------~->
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>

I bought a 16 foot USB extension in case I needed it, and I have
matching long audio cables.

The monitor is the culprit most of the time, but just in case I have
a Industrial PC that they were throwing out at work, It's fully
encased in metal including a grounded cover for the CD/Floppy drive
area. With it came a 15.1" LCD monitor that I hope will be quieter
that the regular monitors I have.

I still have not received my SR-40. When it was first available I
stayed late and bought some, then next day I was 8th on the list,
with the current list I'm down to 50 or lower. And people all around
me have received theirs. It's a conspiracy, I should have worn my
aluminium hat!

>I'm brand spankin' new to the group so didn't see the original thread.
>
>Expecting a sensitive receiver to operate just inches away from a
>wideband noise source is optimistic (IMHO). For best results, it
>needs shielding just like any other receiver and or transmitter does.
>
>Computer noise might not show up as clean carriers or be identifiable
>by tuning across the band. It appears as an elevated noise floor most
>of the time, which sounds like background noise. I'm sure many people
>have interference from their own computers and most don't even
>realize it's there because it sounds rather like normal atmospheric noise.
>
>For absolute best results, shield it. For casual listening on a
>crowded band, don't worry about it and run it as supplied.
>
>My softrock-40 is going on LF when I get it and it will be located
>away from the computer and shielded. Switching supplies, florescent
>lamps and computer interference is pretty severe at 190 kHz and I
>want to have good reception. I'm even considering magnetic shielding
>due to the nature of the interference at these frequencies.
>
>Regards,
>
>Art
>
>
>
>
>
>>The supply from the USB connector is 5V. Are you using a separate power
>>supply?
>
>
>--
>No virus found in this outgoing message.
>Checked by AVG Anti-Virus.
>Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>


--
Cecil
KD5NWA
<www.qrpradio.com>

I fail to see why doing the same thing over and over and getting the
same results every time is insanity: I've almost proved it isn't;
only a few more tests now and I'm sure results will differ this time
...

Stan Rife
W5EWA
Houston, TX
K2 S/N 4216
 

-----Original Message-----
From: softrock40@yahoogroups.com [mailto:softrock40@yahoogroups.com] On Behalf Of kb9yig
Sent: Saturday, September 17, 2005 9:28 PM
To: softrock40@yahoogroups.com
Subject: [softrock40] Re: Interference from PC?

Hi Rein,

I have built about 25 of the v4.0 SoftRock40 receivers and find the PC
noise does not cause much of a problem.  When the receiver is
calibrated to S9, (-73 dBM, 50 uV RMS), the baseline is around -135
dBm with 10-15 dB spikes riding on the baseline every 1 kHz or so. 
Also at the LO frequency, around 7.054-7.056 MHz there is a large
broad spike associated with the LO and the fact that the soundcard
contributes lots of noise near zero frequency. 

I will be quite interested in the experience of SoftRock40 builders as
they finish their kits.  If I can help with problems in getting the
little receive running, I would be happy to do so.

73,
Tony KB9YIG

--- In softrock40@yahoogroups.com, "observer35" <rein0zn@i...> wrote:
> Hi all,
>
> Just new to the group.
>
> Does anybody experience interference from the PC on 40 meters?
>
> What about noise and garbage on the 5 V USB line?
>
> 73 Rein W6/PA0ZN
>
> http://www.nitehawk.com/linrad_dat/

Stan Rife
W5EWA
Houston, TX
K2 S/N 4216
 

-----Original Message-----
From: softrock40@yahoogroups.com [mailto:softrock40@yahoogroups.com] On Behalf Of KY1K
Sent: Sunday, September 18, 2005 11:26 AM
To: softrock40@yahoogroups.com
Subject: Re: [softrock40] Re: Interference from PC?

I'm brand spankin' new to the group so didn't see the original thread.

Expecting a sensitive receiver to operate just inches away from a
wideband noise source is optimistic (IMHO). For best results, it
needs shielding just like any other receiver and or transmitter does.

Computer noise might not show up as clean carriers or be identifiable
by tuning across the band. It appears as an elevated noise floor most
of the time, which sounds like background noise. I'm sure many people
have interference from their own computers and most don't even
realize it's there because it sounds rather like normal atmospheric noise.

For absolute best results, shield it. For casual listening on a
crowded band, don't worry about it and run it as supplied.

My softrock-40 is going on LF when I get it and it will be located
away from the computer and shielded. Switching supplies, florescent
lamps and computer interference is pretty severe at 190 kHz and I
want to have good reception. I'm even considering magnetic shielding
due to the nature of the interference at these frequencies.

Regards,

Art





>The supply from the USB connector is 5V. Are you using a separate power
>supply?


--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005

Hello All,


I am afraid that I started the discussion on computer noise in
receivers. This was more a general question and
not about this particular setup. The question was not about noise within
the freq range of this particular design.
Nor did I specify antennas in use, band active etc or not. Nor is it in
anyway to criticize the design or whether
the costs of this board or too high or to low.

Besides that I hope that we can accept questions like this one and
discuss the subjects in a rational way as
radio amateurs interested in home brew and/or new technology and in each
others experiences and views.

73 Rein W6/PA0ZN





Stan Rife wrote:

>    Tony, one thing I noticed, when just playing around with the SDR
> software, was the 600 Hz tone that comes from the soundcard (?) at the
> 7.056 freq. after the Fixed HW oscilator is set up per the
> instructions. This is, of course, without the SoftRock hardware
> installed, as I do not even have my kit YET. (boo hoo).
>     Is this oscilator tone, at that freq., something that will always
> be there? I saw a procedure in the manual that said something about
> going above 7.056, as much as the test oscilator is below 7.056 and
> adjusting for a null. I am not quite clear on all of this. I do have
> an XG-1, and I assume that is what this is refering to.
>
>
> Stan Rife
> W5EWA
> Houston, TX
> K2 S/N 4216
>
>
>     -----Original Message-----
>     From: softrock40@yahoogroups.com
>     [mailto:softrock40@yahoogroups.com] On Behalf Of kb9yig
>     Sent: Saturday, September 17, 2005 9:28 PM
>     To: softrock40@yahoogroups.com
>     Subject: [softrock40] Re: Interference from PC?
>
>     Hi Rein,
>
>     I have built about 25 of the v4.0 SoftRock40 receivers and find
>     the PC
>     noise does not cause much of a problem.  When the receiver is
>     calibrated to S9, (-73 dBM, 50 uV RMS), the baseline is around -135
>     dBm with 10-15 dB spikes riding on the baseline every 1 kHz or so.
>     Also at the LO frequency, around 7.054-7.056 MHz there is a large
>     broad spike associated with the LO and the fact that the soundcard
>     contributes lots of noise near zero frequency.
>
>     I will be quite interested in the experience of SoftRock40
>     builders as
>     they finish their kits.  If I can help with problems in getting the
>     little receive running, I would be happy to do so.
>
>     73,
>     Tony KB9YIG
>
>     --- In softrock40@yahoogroups.com, "observer35" <rein0zn@i...> wrote:
>     > Hi all,
>     >
>     > Just new to the group.
>     >
>     > Does anybody experience interference from the PC on 40 meters?
>     >
>     > What about noise and garbage on the 5 V USB line?
>     >
>     > 73 Rein W6/PA0ZN
>     >
>     > http://www.nitehawk.com/linrad_dat/
>
>
>
>     ------------------------------------------------------------------------
>     YAHOO! GROUPS LINKS
>
>         *  Visit your group "softrock40
>           <http://groups.yahoo.com/group/softrock40>" on the web.
>
>         *  To unsubscribe from this group, send an email to:
>            softrock40-unsubscribe@yahoogroups.com
>           <mailto:softrock40-unsubscribe@yahoogroups.com?subject=Unsubscribe>
>
>         *  Your use of Yahoo! Groups is subject to the Yahoo! Terms of
>           Service <http://docs.yahoo.com/info/terms/>.
>
>
>     ------------------------------------------------------------------------
>

Stan Rife
W5EWA
Houston, TX
K2 S/N 4216
 

-----Original Message-----
From: softrock40@yahoogroups.com [mailto:softrock40@yahoogroups.com] On Behalf Of Jim Sheldon
Sent: Sunday, September 18, 2005 11:47 AM
To: softrock40@yahoogroups.com
Subject: RE: [softrock40] Re: Interference from PC?

I have my softrock 40 running.  It's plugged into an external USB hub for
power, and hooked up to my B & W broadband folded dipole.  I can find no
birdies within it's limited tuning range - 7.030 to 7.080 as specified in
the AMQRP info.  It is extremely sensitive, and copies signals within that
range as well as my K2 does, and that's saying something.  The K2 has by far
the best receiver of any rig I've ever owned.

All this talk about computer birdies and pc noise is pretty much unfounded.
There is NO noise apparent with the scope on the DC voltage line coming from
the USB port.

The computer is a Dell Dimension 8100, Pentium IV @ 1.4GHz and even with the
covers off, I still cannot find any birds attributable to the computer. 

I AM using just the bare-bones, unsupported SoundBlaster PCI sound card
that's built into the Dell's motherboard.  It performs adequately for the
Soft Rock 40, but I would presume to say that if one had an SDR-1000, this
card would definitely be struggling.  My sampling rate is only 48 KHz, and
it still does very well. 

Maybe this will allay some of the fears I see expressed here on the
reflector. 

What the heck do you expect for $23 bucks a full blown SDR-1000?  Jeez,
lighten up and experiment with the thing! It works as advertised, and maybe
even better considering the low end sound card I'm using.

Jim - W0EB

Hi Stan,

Yes, the tone at 7.056 MHz (or what ever frequency you set in as the
fixed oscillator frequency) is always there.  One of the software
guys who has worked on SDR-1000 software thinks something can be
done to reduce that large noise spike. The source for that tone when
no SoftRock is connected is still not well understood, at least not
by me.  The thought is that the sound card adds more noise at near
zero frequency as well as 60 Hz noise pickup.  I have notice when a
SSB signal spectrum was centered on that frequency, the SSB signal
was still quite readable.  When the SoftRock is connected, then that
noise at 7.056 MHz also contains a LO signal.

The use of the XG1 is for S9 calibration at -73 dBm, receiver
sensitivity check and image null at (7.056 -7.04) above 7.056 MHz.

Hope this helps Stan

73,
Tony KB9YIG
--- In softrock40@yahoogroups.com, "Stan Rife" <srife@s...> wrote:
>    Tony, one thing I noticed, when just playing around with the SDR
> software, was the 600 Hz tone that comes from the soundcard (?) at
the 7.056
> freq. after the Fixed HW oscilator is set up per the instructions.
This is,
> of course, without the SoftRock hardware installed, as I do not
even have my
> kit YET. (boo hoo).
>     Is this oscilator tone, at that freq., something that will
always be
> there? I saw a procedure in the manual that said something about
going above
> 7.056, as much as the test oscilator is below 7.056 and adjusting
for a
> null. I am not quite clear on all of this. I do have an XG-1, and
I assume
> that is what this is refering to.
>
>
> Stan Rife
> W5EWA
> Houston, TX
> K2 S/N 4216
>
>
> -----Original Message-----
> From: softrock40@yahoogroups.com
[mailto:softrock40@yahoogroups.com] On
> Behalf Of kb9yig
> Sent: Saturday, September 17, 2005 9:28 PM
> To: softrock40@yahoogroups.com
> Subject: [softrock40] Re: Interference from PC?
>
>
> Hi Rein,
>
> I have built about 25 of the v4.0 SoftRock40 receivers and find
the PC
> noise does not cause much of a problem.  When the receiver is
> calibrated to S9, (-73 dBM, 50 uV RMS), the baseline is around -
135
> dBm with 10-15 dB spikes riding on the baseline every 1 kHz or
so.
> Also at the LO frequency, around 7.054-7.056 MHz there is a large
> broad spike associated with the LO and the fact that the soundcard
> contributes lots of noise near zero frequency.
>
> I will be quite interested in the experience of SoftRock40
builders as
> they finish their kits.  If I can help with problems in getting
the
> little receive running, I would be happy to do so.
>
> 73,
> Tony KB9YIG
>
> --- In softrock40@yahoogroups.com, "observer35" <rein0zn@i...>
wrote:
> > Hi all,
> >
> > Just new to the group.
> >
> > Does anybody experience interference from the PC on 40 meters?
> >
> > What about noise and garbage on the 5 V USB line?
> >
> > 73 Rein W6/PA0ZN
> >
> > http://www.nitehawk.com/linrad_dat/
>
>
>
>
>   _____
>
> YAHOO! GROUPS LINKS
>
>
>
> *  Visit your group "softrock40
> <http://groups.yahoo.com/group/softrock40> " on the web.
>
>
> *  To unsubscribe from this group, send an email to:
>  softrock40-unsubscribe@yahoogroups.com
> <mailto:softrock40-unsubscribe@yahoogroups.com?
subject=Unsubscribe>
>
>
> *  Your use of Yahoo! Groups is subject to the Yahoo! Terms of
Service
> <http://docs.yahoo.com/info/terms/> .
>
>
>   _____

I believe the gunk you see near the center frequency with or w/o hardware
attached is an artifact of the signal processing architecture, and  noise
near DC on the audio input (ie 60 hz hum,. etc)

How the software tuning works is by having a software mixer fed with the
local oscillator to dowconvert the signal of interest.  In the case of the
SoftRock, you have the hardware QSD downconverting and quadrature sampling
a 48 khz swath of RF centered on 7.056 Mhz.  To listen to a signal at 7.060
MHz, the software mixer is set to run with a local oscillator at 4 khz to
mix down the 7.056 Mhz centered signal.  As you tune closer to the center
frequency, the freq of the software local oscillator gets lower and
lower.  Very near the center frequency, the local osc will be in the 100's
of hz,  Mixed with 60 hz (and harmonics) hum this will tend to product
responses at 60Hz (and harmonics)  +/- SoftwareLO  etc -- thereby getting
you the gunk around the center frequency.

I will have to admit that my understanding of this phenomenon is not as
crisp as I would like it to be. As Tony said in a prior post, there's some
hope that some of this can be eliminated with DSP magic.  One approach
would be to record and characterize the noise characteristics with no input
and then try and remove them with DSP magic when fed with a real
signal.  One could do this in either the time domain or frequency domain,
although I'm not sure how one would maintain sync with the noise signal in
the time domain.  My DSP skills are not strong enough (yet) to really know
how feasible such an approach would be.

Another (potentially naive) approach might be to try a different tuning
approach.  If one is interested in a sig at 7.060, I'd think one could take
an FFT of the input signal, zero the FFT bins outside the passband of
interest, shift the spectrum over by 4 khz and then IFFT the result to
recover the signal of interest.  I think this should work, but not having
tried it really can't  say for sure.  Also not too clear in my mind if this
would be better than the software mixing approach currently used as you get
closer to DC.

One thing to be aware of -- in a more complete SDR with a frequency agile
downconverter, you typically don't tune in software down near DC.  For
example, on the SDR 1000, the tuning is always such that you're
approximately 11khz above DC for software tuning.  The reason for this
being approximate is that the DDS tuning is limited to tuning to freqs
where the DDS generates a minimum of spurs.

I will be the first to admit I'm somewhat of a neophyte with DSP.  SDR is
an area rich with opportunities for learning and experimenting, and we've
now got hardware and software accessible to the amateur community to
experiment with.  Hoping folks get in there and do some experimenting and
learning.

Cheers,

Bill (kd5tfd)


At 01:25 PM 9/18/2005, Stan Rife wrote:
>    Tony, one thing I noticed, when just playing around with the SDR
> software, was the 600 Hz tone that comes from the soundcard (?) at the
> 7.056 freq. after the Fixed HW oscilator is set up per the instructions.
> This is, of course, without the SoftRock hardware installed, as I do not
> even have my kit YET. (boo hoo).
>     Is this oscilator tone, at that freq., something that will always be
> there? I saw a procedure in the manual that said something about going
> above 7.056, as much as the test oscilator is below 7.056 and adjusting
> for a null. I am not quite clear on all of this. I do have an XG-1, and I
> assume that is what this is refering to.
>
>
>Stan Rife
>W5EWA
>Houston, TX
>K2 S/N 4216
>

Stan Rife
W5EWA
Houston, TX
K2 S/N 4216
 

-----Original Message-----
From: softrock40@yahoogroups.com [mailto:softrock40@yahoogroups.com] On Behalf Of Bill Tracey
Sent: Sunday, September 18, 2005 2:57 PM
To: softrock40@yahoogroups.com; softrock40@yahoogroups.com
Subject: RE: [softrock40] Re: Interference from PC?

I believe the gunk you see near the center frequency with or w/o hardware
attached is an artifact of the signal processing architecture, and  noise
near DC on the audio input (ie 60 hz hum,. etc)

How the software tuning works is by having a software mixer fed with the
local oscillator to dowconvert the signal of interest.  In the case of the
SoftRock, you have the hardware QSD downconverting and quadrature sampling
a 48 khz swath of RF centered on 7.056 Mhz.  To listen to a signal at 7.060
MHz, the software mixer is set to run with a local oscillator at 4 khz to
mix down the 7.056 Mhz centered signal.  As you tune closer to the center
frequency, the freq of the software local oscillator gets lower and
lower.  Very near the center frequency, the local osc will be in the 100's
of hz,  Mixed with 60 hz (and harmonics) hum this will tend to product
responses at 60Hz (and harmonics)  +/- SoftwareLO  etc -- thereby getting
you the gunk around the center frequency.

I will have to admit that my understanding of this phenomenon is not as
crisp as I would like it to be. As Tony said in a prior post, there's some
hope that some of this can be eliminated with DSP magic.  One approach
would be to record and characterize the noise characteristics with no input
and then try and remove them with DSP magic when fed with a real
signal.  One could do this in either the time domain or frequency domain,
although I'm not sure how one would maintain sync with the noise signal in
the time domain.  My DSP skills are not strong enough (yet) to really know
how feasible such an approach would be.

Another (potentially naive) approach might be to try a different tuning
approach.  If one is interested in a sig at 7.060, I'd think one could take
an FFT of the input signal, zero the FFT bins outside the passband of
interest, shift the spectrum over by 4 khz and then IFFT the result to
recover the signal of interest.  I think this should work, but not having
tried it really can't  say for sure.  Also not too clear in my mind if this
would be better than the software mixing approach currently used as you get
closer to DC.

One thing to be aware of -- in a more complete SDR with a frequency agile
downconverter, you typically don't tune in software down near DC.  For
example, on the SDR 1000, the tuning is always such that you're
approximately 11khz above DC for software tuning.  The reason for this
being approximate is that the DDS tuning is limited to tuning to freqs
where the DDS generates a minimum of spurs.

I will be the first to admit I'm somewhat of a neophyte with DSP.  SDR is
an area rich with opportunities for learning and experimenting, and we've
now got hardware and software accessible to the amateur community to
experiment with.  Hoping folks get in there and do some experimenting and
learning.

Cheers,

Bill (kd5tfd)


At 01:25 PM 9/18/2005, Stan Rife wrote:
>    Tony, one thing I noticed, when just playing around with the SDR
> software, was the 600 Hz tone that comes from the soundcard (?) at the
> 7.056 freq. after the Fixed HW oscilator is set up per the instructions.
> This is, of course, without the SoftRock hardware installed, as I do not
> even have my kit YET. (boo hoo).
>     Is this oscilator tone, at that freq., something that will always be
> there? I saw a procedure in the manual that said something about going
> above 7.056, as much as the test oscilator is below 7.056 and adjusting
> for a null. I am not quite clear on all of this. I do have an XG-1, and I
> assume that is what this is refering to.
>
>
>Stan Rife
>W5EWA
>Houston, TX
>K2 S/N 4216
>

--- In softrock40@yahoogroups.com, Bill Tracey <kd5tfd@a...> wrote:
> ...the gunk you see near the center frequency with or w/o hardware
> attached is an artifact of the signal processing architecture, and
noise
> near DC on the audio input (ie 60 hz hum,. etc)...

Exactly, and this is one tough sucker to get rid of.

The soundcard is one of the most vulnerable spots for letting in
spurious signals. Most soundards get around the problem by rolling off
the frequency response below 100Hz or so.

Rolling off is not the same as eliminating, however, and when you can
mix the residual spurious signals up into the center of the passband,
they're conspicuous weak signals just like anything else would be.

It is possible through DSP magic to subtract out the gunk, but you pay
for it with a higher MDS. Preferable on the whole to use a better
soundcard.

73
Frank
AB2KT

Frank and the group.

Until recently, the sound card has been thought of as a secondary
accessory. By that I mean it plays the windows warning sound, or an
mp3 or wav file and allows one to listen to sound effects when
playing computer games.....

Only recently has anyone though of using it for serious work,
although there are a few exceptions.

Even on todays best sound cards, there is no shielding despite having
16 bit sensitivity on the inputs and being mounted inside a big noise
generator, esp[ecially bad for magnetic interference.

Nothing surprises me when it comes to sound cards, they use dimestore
time bases and are far from what they could/should be.

However, they're cheap and plentiful and give us a taste of what we
can do when better sound cards become more common place.

Regards,

Art


>The soundcard is one of the most vulnerable spots for letting in
>spurious signals.


--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005

I've posted a few updates to the SoftRock updates for PowerSDR.  Nothing
major, just some bug fixes.  Specifically:

- Fixed problem using an SDR 1000 in fixed freq mode
- Fixed a potential glitch/hang in level calibration with a SoftRock 40
- Fixed smooth panadapter scrolling when in fixed freq mode

To get the new code: http://ewjt.com/kd5tfd/sdr1k-notebook/sr40/sw.html

Regards,

Bill (kd5tfd)

Stan Rife
W5EWA
Houston, TX
K2 S/N 4216
 

-----Original Message-----
From: softrock40@yahoogroups.com [mailto:softrock40@yahoogroups.com] On Behalf Of Bill Tracey
Sent: Sunday, September 18, 2005 2:57 PM
To: softrock40@yahoogroups.com; softrock40@yahoogroups.com
Subject: RE: [softrock40] Re: Interference from PC?

I believe the gunk you see near the center frequency with or w/o hardware
attached is an artifact of the signal processing architecture, and  noise
near DC on the audio input (ie 60 hz hum,. etc)

How the software tuning works is by having a software mixer fed with the
local oscillator to dowconvert the signal of interest.  In the case of the
SoftRock, you have the hardware QSD downconverting and quadrature sampling
a 48 khz swath of RF centered on 7.056 Mhz.  To listen to a signal at 7.060
MHz, the software mixer is set to run with a local oscillator at 4 khz to
mix down the 7.056 Mhz centered signal.  As you tune closer to the center
frequency, the freq of the software local oscillator gets lower and
lower.  Very near the center frequency, the local osc will be in the 100's
of hz,  Mixed with 60 hz (and harmonics) hum this will tend to product
responses at 60Hz (and harmonics)  +/- SoftwareLO  etc -- thereby getting
you the gunk around the center frequency.

I will have to admit that my understanding of this phenomenon is not as
crisp as I would like it to be. As Tony said in a prior post, there's some
hope that some of this can be eliminated with DSP magic.  One approach
would be to record and characterize the noise characteristics with no input
and then try and remove them with DSP magic when fed with a real
signal.  One could do this in either the time domain or frequency domain,
although I'm not sure how one would maintain sync with the noise signal in
the time domain.  My DSP skills are not strong enough (yet) to really know
how feasible such an approach would be.

Another (potentially naive) approach might be to try a different tuning
approach.  If one is interested in a sig at 7.060, I'd think one could take
an FFT of the input signal, zero the FFT bins outside the passband of
interest, shift the spectrum over by 4 khz and then IFFT the result to
recover the signal of interest.  I think this should work, but not having
tried it really can't  say for sure.  Also not too clear in my mind if this
would be better than the software mixing approach currently used as you get
closer to DC.

One thing to be aware of -- in a more complete SDR with a frequency agile
downconverter, you typically don't tune in software down near DC.  For
example, on the SDR 1000, the tuning is always such that you're
approximately 11khz above DC for software tuning.  The reason for this
being approximate is that the DDS tuning is limited to tuning to freqs
where the DDS generates a minimum of spurs.

I will be the first to admit I'm somewhat of a neophyte with DSP.  SDR is
an area rich with opportunities for learning and experimenting, and we've
now got hardware and software accessible to the amateur community to
experiment with.  Hoping folks get in there and do some experimenting and
learning.

Cheers,

Bill (kd5tfd)


At 01:25 PM 9/18/2005, Stan Rife wrote:
>    Tony, one thing I noticed, when just playing around with the SDR
> software, was the 600 Hz tone that comes from the soundcard (?) at the
> 7.056 freq. after the Fixed HW oscilator is set up per the instructions.
> This is, of course, without the SoftRock hardware installed, as I do not
> even have my kit YET. (boo hoo).
>     Is this oscilator tone, at that freq., something that will always be
> there? I saw a procedure in the manual that said something about going
> above 7.056, as much as the test oscilator is below 7.056 and adjusting
> for a null. I am not quite clear on all of this. I do have an XG-1, and I
> assume that is what this is refering to.
>
>
>Stan Rife
>W5EWA
>Houston, TX
>K2 S/N 4216
>

The 24th Annual ARRL and TAPR Digital Communications Conference
September 23-25, 2005
Santa Ana, California
http://www.tapr.org/dcc


Finally, at long last, the 24th Annual ARRL and TAPR Digital Communications
Conference is this week, Friday, Saturday and Sunday.


Lunch Time!
------------------------------
Lunches will be served Friday and Saturday noon time.  This way you do not
waste any time.  Once the last talk of the morning is done, lunch will be
waiting.  Then one hour later you are back listening to the next speaker.
The cost is $15.00 each meal.  You can sign up for lunch on the DCC web site
or pay at the conference.  THERE ARE A LIMITED NUMBER OF LUNCHES.  Sign up
early to be included.


Friday Night Social
------------------------------
Join us at the Friday night social gathering.  Hors d’oeuvres and sodas are
provided.


Schedule Posted
------------------------------
An updated schedule has been posted to the DCC web site.  The schedule
includes all talks, speakers and introductory sessions.


Demonstrations Galore!
------------------------------
There will be many projects on display in the demonstration room.  Bring
yours to show.
  - GNU Radio and the USRP
  - Flex-Radio and the SDR-1000
  - ICOM - D-Star
  - AOR's new digital radio modems, the ARD9000 and ARD9800
  - and much more...


Banquet
------------------------------
Our Banquet speaker is Dan Cregg, KB6ENX, Chief Technology Officer -
Smarthome Inc.

Dan Cregg began his tenure at Smarthome as director of engineering and
product development in 1997 when Smarthome acquired SmartLinc, a company
Cregg co-founded.  In addition to co-founding SmartLinc, Cregg founded and
was president of HomeRun Automation, which was purchased by SmartLinc in
1997.  Cregg has also held engineering positions at McDonnell-Douglas, SVG
Thermco and Universal Electronics.  Cregg holds a bachelor's degree in
engineering from California State University, Long Beach and is a member of
the engineering schools executive advisory council.


Introductory Sessions
------------------------------
  - Overview of HF Digital Modes by Steve Ford, WB8IMY
  - Intro to APRS by Darryl Smith, VK2TDS
  - Intro to Eagle CAD by Dan Welch, W6DFW
  - Intro to WSJT Digital Meteor Scatter by Steve Ford, WB8IMY


Sunday Seminar - Turning Ideas into Products: TAPR Project Development
------------------------------
This year's Sunday Morning Seminar will focus on the practicalities of
turning your back-of-the-napkin design for either hardware or software into
a product that other hams can use.  It will address the mechanics of
converting a hardware design into a kit or finished product, such as
selecting parts, using CAD tools, selecting a PC board house, preparing
documentation, and preparing for support.  It will also address intellectual
property issues, and in particular explain how you can use Open Source
licenses in your software project.  Although the Seminar will focus on the
TAPR design philosophy and process, it will be valuable for anyone
contemplating a ham radio product or kit, or just wanting to learn how
today's tools make it easy to create printed circuit boards.


Conference Information and Registration
------------------------------
Conference information and registration can be made online at
http://www.tapr.org/dcc/


73,

- The DCC Committee

Stan Rife
W5EWA
Houston, TX
K2 S/N 4216
 

-----Original Message-----
From: softrock40@yahoogroups.com [mailto:softrock40@yahoogroups.com] On Behalf Of Bill Tracey
Sent: Monday, September 19, 2005 8:35 AM
To: softrock40@yahoogroups.com
Subject: [softrock40] Fresh Software - 20050917 level

I've posted a few updates to the SoftRock updates for PowerSDR.  Nothing
major, just some bug fixes.  Specifically:

- Fixed problem using an SDR 1000 in fixed freq mode
- Fixed a potential glitch/hang in level calibration with a SoftRock 40
- Fixed smooth panadapter scrolling when in fixed freq mode

To get the new code: http://ewjt.com/kd5tfd/sdr1k-notebook/sr40/sw.html

Regards,

Bill (kd5tfd) 

----- Original Message -----
From: "Stan Rife" <srife@...>
To: <softrock40@yahoogroups.com>
Sent: Monday, September 19, 2005 4:52 PM
Subject: RE: [softrock40] Fresh Software - 20050917 level


Bill,
     I downloaded the update and when I try to turn on the SDR software, I
get no response and it goes imediately back to STANDBY. I do not have a
SoftRock 40 hooked up yet. I don't think anything has changed on my system,
but I will reboot and check everything out if that doesn't fix it. Any
ideas? The previous versions worked fine.

I get a constant loud rough-sounding dit-dah-dit..., without anything
connected. I still get it when playing one of the wav files.

Leon



--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 16/09/2005

---
[This E-mail has been scanned for viruses but it is your responsibility
to maintain up to date anti virus software on the device that you are
currently using to read this email. ]

Oh, good! It's not just me.

Eric
KE6US
www.ke6us.com

--- Stan Rife <srife@...> wrote:

> Bill,
>     I downloaded the update and when I try to turn
> on the SDR software, I
> get no response and it goes imediately back to
> STANDBY. I do not have a
> SoftRock 40 hooked up yet. I don't think anything
> has changed on my system,
> but I will reboot and check everything out if that
> doesn't fix it. Any
> ideas? The previous versions worked fine.
>
> Thanks,
>
>
> Stan Rife
> W5EWA
> Houston, TX
> K2 S/N 4216
>
>
> -----Original Message-----
> From: softrock40@yahoogroups.com
> [mailto:softrock40@yahoogroups.com] On
> Behalf Of Bill Tracey
> Sent: Monday, September 19, 2005 8:35 AM
> To: softrock40@yahoogroups.com
> Subject: [softrock40] Fresh Software - 20050917
> level
>
>
> I've posted a few updates to the SoftRock updates
> for PowerSDR.  Nothing
> major, just some bug fixes.  Specifically:
>
> - Fixed problem using an SDR 1000 in fixed freq mode
> - Fixed a potential glitch/hang in level calibration
> with a SoftRock 40
> - Fixed smooth panadapter scrolling when in fixed
> freq mode
>
> To get the new code:
> http://ewjt.com/kd5tfd/sdr1k-notebook/sr40/sw.html
>
> Regards,
>
> Bill (kd5tfd)
>
>
>
>
>
> SPONSORED LINKS
> Shortwave
>
<http://groups.yahoo.com/gads?t=ms&k=Shortwave+receivers&w1=Shortwave+receiv
>
ers&w2=Ham+radio&c=2&s=40&.sig=MB4yUGINw9tizVKS3Upr0w>
> receivers  Ham
>
<http://groups.yahoo.com/gads?t=ms&k=Ham+radio&w1=Shortwave+receivers&w2=Ham
> +radio&c=2&s=40&.sig=XNtLoznpXE_hqNE4dvfaHA> radio
>
>   _____
>
> YAHOO! GROUPS LINKS
>
>
>
> *  Visit your group "softrock40
> <http://groups.yahoo.com/group/softrock40> " on the
> web.
>
>
> *  To unsubscribe from this group, send an email to:
>  softrock40-unsubscribe@yahoogroups.com
>
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>
>
>
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Eric, Leon & Stan

I saw you were having trouble with Bill's latest software so I just
now downloaded it and updated my system to check it out. It came up
without any problem. I wonder if you have the latest PowerSDR 1.4.4
installed or if you are using a previous version? It seems to be
working fine here without a receiver attached. Remember to select
the "Hardware Oscillator" option under Setup, SoftRock.

Cecil WA6RDY



--- In softrock40@yahoogroups.com, EricJ <eric_ke6us@y...> wrote:
> Oh, good! It's not just me.
>
> Eric
> KE6US
> www.ke6us.com
>
> --- Stan Rife <srife@s...> wrote:
>
> > Bill,
> >     I downloaded the update and when I try to turn
> > on the SDR software, I
> > get no response and it goes imediately back to
> > STANDBY. I do not have a
> > SoftRock 40 hooked up yet. I don't think anything
> > has changed on my system,
> > but I will reboot and check everything out if that
> > doesn't fix it. Any
> > ideas? The previous versions worked fine.
> >
> > Thanks,
> >
> >
> > Stan Rife
> > W5EWA
> > Houston, TX
> > K2 S/N 4216
> >
> >
> > -----Original Message-----
> > From: softrock40@yahoogroups.com
> > [mailto:softrock40@yahoogroups.com] On
> > Behalf Of Bill Tracey
> > Sent: Monday, September 19, 2005 8:35 AM
> > To: softrock40@yahoogroups.com
> > Subject: [softrock40] Fresh Software - 20050917
> > level
> >
> >
> > I've posted a few updates to the SoftRock updates
> > for PowerSDR.  Nothing
> > major, just some bug fixes.  Specifically:
> >
> > - Fixed problem using an SDR 1000 in fixed freq mode
> > - Fixed a potential glitch/hang in level calibration
> > with a SoftRock 40
> > - Fixed smooth panadapter scrolling when in fixed
> > freq mode
> >
> > To get the new code:
> > http://ewjt.com/kd5tfd/sdr1k-notebook/sr40/sw.html
> >
> > Regards,
> >
> > Bill (kd5tfd)
> >
> >
> >
> >
> >
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