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SR-40 Folks,

The things I learned by doing the installation incorrectly may be of help to others. Especially those of us who are not software/hardware technicians and engineers.

If your computer is running with a current acceptable operating system, utilities and associated hardware, then here's what worked with my XP Pro system. You will need to know how to create folders, extract (unzip), locate and run the software much like any other application you would install. (I use MS Explorer to create folders and move files.) The following are two install options --

Indirect Extraction Method:

1. Download the PowerSDR v1.4.4 software into temp folder 1 as described in the SR-40 manual or AmQRP SR-40 website. Extract the files into the same folder/directory. You should see three files.

2. Download the SD-40 overlay software into a separate temp folder 2 and extract it into the same folder. You should see two files -- .

3. From temp folder 1 where PowerSDR was extracted, run Setup.exe. This will install all of the files for PowerSDR v1.4.4. You should see a shortcut icon on your desktop. The files are installed into the
"C:\Program Files\Flex Radio\PowerSDR v1.4.4" folder.

4. Locate and open the above PowerSDR folder.

5. Copy the two files from temp folder 2 into this folder. The SD-40 version will replace or overwrite the PowerSDR.exe file previously installed.

You should now be able to run the software from the PowerSDR icon on your desktop.

Direct Extraction Method:

1. Download the PowerSDR v1.4.4 software into temp folder 1 as described in the SR-40 manual. Extract the files into the same folder/directory. You should see three files.

2. Download the SD-40 overlay software into a separate temp folder 2.

3. From temp folder 1 where PowerSDR was extracted, run Setup.exe. This will install all of the files for PowerSDR v1.4.4. You should see a shortcut icon on your desktop. The files are installed into the
"C:\Program Files\Flex Radio\PowerSDR v1.4.4" folder.

4. Open temp folder 2 and extract the files directly to the path shown above. You should be able to browse to this path from your extraction program. This step will overwrite the PowerSDR.exe file and add a .dll file to the folder (total of 15 files now.)

You should now be able to run the software from the PowerSDR v1.4.4 icon on your desktop. Refer to the SD-40 manual to continue.


Worked for me -- hope it does for you too.


Chuck Carpenter, W5USJ, Point, TX -|- Rains Co. -|- EM22cv -|- 72 es <oo>
50 years -|- 19 - K2OFN and 31 - W5USJ -|- Most fun = QRP since 1984.
www.w5usj.com hosted by Hamnutz.com -|- NeTxQRP www.netxqrp.com

Not thinking about what was really supposed to happen...

My mind isn't working -- as usual -- the install direcdtory/folder is not the temp directory/folder...[g]

I checked the Program Files folder, found Flex Radio Systems, went back to the folder where I had opened the SR 40 stuff and copied the two files to the Flex Radio System folder.

Voila...

What a dunce... going to blame it on CRS...


Chuck Carpenter, W5USJ, Point, TX -|- Rains Co. -|- EM22cv -|- 72 es <oo>
50 years -|- 19 - K2OFN and 31 - W5USJ -|- Most fun = QRP since 1984.
www.w5usj.com hosted by Hamnutz.com -|- NeTxQRP www.netxqrp.com

Chuck,

Have you intalled the Softrock files into the same directory as
PowerSDR? The files that are Soft-Rock specific are supposed to be
written over the ones that come with the Power SDR distribution
files. Also, what version of Windows are you running?
-Bruce.

--- In softrock40@..., Chuck Carpenter <w5usj@9...>
wrote:

The install of the PowerSDR v1.4.4 seems to be OK. I can select

the

installed shortcut, see the screen and manipulate the controls.

When I run the PowerSDR.exe SoftRock 40 Editon, I see the loading

screen

and the thermometer open up and almost immediately a Fatal Error

message:

File or assembly name Interop.ADOX, or one of its dependencies,

was not found.

Then there are 4 file names listed as -- at PowerSDR.<ext>

The thermometer continues but stops at 9 seconds.

What's up?


Chuck Carpenter, W5USJ, Point, TX -|- Rains Co. -|- EM22cv -|- 72

es <oo>

50 years -|- 19 - K2OFN and 31 - W5USJ -|- Most fun = QRP since

1984.

www.w5usj.com hosted by Hamnutz.com -|- NeTxQRP www.netxqrp.com

The install of the PowerSDR v1.4.4 seems to be OK. I can select the installed shortcut, see the screen and manipulate the controls.

When I run the PowerSDR.exe SoftRock 40 Editon, I see the loading screen and the thermometer open up and almost immediately a Fatal Error message:

File or assembly name Interop.ADOX, or one of its dependencies, was not found.

Then there are 4 file names listed as -- at PowerSDR.<ext>

The thermometer continues but stops at 9 seconds.

What's up?


Chuck Carpenter, W5USJ, Point, TX -|- Rains Co. -|- EM22cv -|- 72 es <oo>
50 years -|- 19 - K2OFN and 31 - W5USJ -|- Most fun = QRP since 1984.
www.w5usj.com hosted by Hamnutz.com -|- NeTxQRP www.netxqrp.com

I updated to the latest wine from winehq.com and the window display
issues went away. SDRadio is much easier for me to use than PowerSDR.
It is just two files, runs right away, and has almost no learning
curve. No doubt PowerSDR is more featureful, but many of the UI
features aren't necessary for the SoftRock-40, as it lacks TX and a
VFO. 73, Leigh / WA5ZNU

--- In softrock40@..., Richard Gagnon <richg_1998@y...> wrote:

What might be the success of using it with Linspire 5.0?

Do you mean DTTSP or SDRadio?

SDradio would probably function equivalently on Linspire. They or the
CodeWeavers / Crossover people might have a little better luck with
the window edges and the window minimization behavior, which are
sub-par on Fedora Core 3 with WINE.

DTTSP appears to be a technology core with some test programs, not
intended for direct use, so I doubt it would run on anything other
than the exact setup the authors have. (The source code, of course,
is being re-used inside other projects, such as the FlexRadio software.)

What I'd really like to see a back end implementation of SDR with no
UI, and a network interface. I had hoped that was what jttdsp was
(Python/C) but it's hard to tell.

I'd like to hear from anyone who can make DTTSP do something, or who
can make Linrad do something with the SoftRock 40.

Maybe I can write one in Java for cross-platform use.

Leigh / WA5ZNU

I have a question about DDS performance. I look forward to the day when DDS is not a bad word with regard to receiver LO performance. There has been much discussion in all the email lists that involve DDS vfo's in their operation. At present, the DDS spectral issue is limiting our ability to produce an ultra high performance receiver.

I have thought about this 'spur' problem quite a bit, and wonder if it's possible to filter out the spurs in the present generation of DDS chips.

I present a possible method for doing so in the following paragraphs and invite comments and discussion.

------------------------------------------------------

If one uses a DDS in a conventional "typical" QSD with software defined radio type software, the bins in the receiver might be 10 Hz wide. By this, I mean the receivers DSP software looks at 10 Hz wide chunks of spectrum and quantifies the energy in each 10 Hz wide chunk of spectrum.

If the DDS chip has a small output corresponding to a particular 10 Hz bin, the software cannot distinguish between the desired signal having energy in this chunk of spectrum or whether it's the DDS (LO) that has a spur that falls within that 10 Hz chunk of spectrum....so, the software has to treat the DDS spur as though it was a weak, but desired signal. Hence, the DDS with a spur actually generates 'interference'. According to one QSD/SDR icons comments on another mailing list, it is unlikely that any 10 Hz wide bin escapes the spur problem because they are small but prevalent! So the bins are to large to avoid DDS spurs, the spurs are very widespread (well distributed in the output spectrum of the DDS). I know FlexRadio uses math to look for 'sweet spots' and jogs the LO and the sound card IF frequency to keep the DDS tuned to these spur free zones........

BUT.........

What would happen if the bins were (say, for instance) .1 Hz (or even .01 Hz) wide? That's 100 (or 1000) times less spectrum per each bin, and 100 (or 1000) times less chance of having a spur fall within a particular (randomly selected) bin. It's much narrower than we need to receive a cw or ssb signal, except in some specialized weak signal work where we use argo to look for very very weak (but coherent) constant frequency carriers.

With .1 Hz wide FFT bins, many of the bins would be spur free.....

BUT......

How can our FFT software tell whether the bin that has energy above the baseline level is the result of a weak desired signal or is the result of a DDS spur??

How about (temporarily) shorting the antenna terminals once the user has stopped tuning, and scanning for bins with energy in them? Those bins with energy in them are probably due to the DDS LO generated spurs. Once the bins with energy in them are identified, they can be removed electronically by having the FFT software toss out the energy in that particular bin before recombining the energy in the entire 3 KHz spectrum in order to listen to our desired ssb signal.

This can only work if the spurs are coherent or remain on the same frequency (once the user stops tuning). Since the DDS output is digital, presumably these spurs are not random in nature and occur at the same amplitude and frequency all the time.

I am software challenged myself. Maybe some of the more DDS savvy hardware people can comment on the coherence, amplitude stability and how often spurs occur when you zoom in on a 3 Khz slice of spectrum with much finer resolution than the typical 10 Hz wide FFT bin. Obviously this method would involve a heavier DSP processing load, but the spurs could be removed to allow for detection of weaker signals that are presently masked by the DDS spurs.

Would this scheme allow us to use a 'dirty' DDS output for our LO's without concern for spurs at all (trading processor load for improved weak signal receive capability)?

Regards,

Art


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What might be the success of using it with Linspire 5.0? I know many Linux
users do not consider it "real" Linux but it works for me since I am not very
geeky.
I do not have my receiver yet so I have not been able to try it.

Richard




--- "Leigh L. Klotz, Jr." <leigh@...> wrote:

I finished my SoftRock-40 and it worked first time on Windows with
SDRadio. Thanks!

I tried installing jDttsp and its many pre-reqs (python-2.4, jack, GNU
SDL-1.6) on FC3 but I couldn't find any documentation on their site
about what it does or how it does it, or even what keys to press, but
it did appear to start up.

So I tried SDRadio under WINE and it ran. I had to kick ALSA by
clickign on the volume control buttons a few times in the mixer (for
some reason this seems to happen after reboots).
The bottom part of the buttons and the right edge are cut off, but at
least it receives CW!

I'm using a Griffin iMic as the sound device. If you have a laptop with
mono sound, you might try one of these. They're cheap and will get you
up and running.

73,
Leigh / WA5ZNU





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I finished my SoftRock-40 and it worked first time on Windows with SDRadio. Thanks!

I tried installing jDttsp and its many pre-reqs (python-2.4, jack, GNU SDL-1.6) on FC3 but I couldn't find any documentation on their site about what it does or how it does it, or even what keys to press, but it did appear to start up.

So I tried SDRadio under WINE and it ran. I had to kick ALSA by clickign on the volume control buttons a few times in the mixer (for some reason this seems to happen after reboots).
The bottom part of the buttons and the right edge are cut off, but at least it receives CW!

I'm using a Griffin iMic as the sound device. If you have a laptop with mono sound, you might try one of these. They're cheap and will get you up and running.

73,
Leigh / WA5ZNU

Hi Eric,

I/Q outputs from U6 should be better than +/- 20% of each other. If one of the control signals to U5 (pins 1, 4, 10 or 13) is missing then the balance would be out by 50%. Please check carefully for opens at all IC pins and for solder bridges between pins.

73,
Tony KB9YIG

Double check the 4 signals controling U5. Also double check the
component values and placement around U6.. You said you did that,
but another check wouldn't hurt. c12 AND c13 of different values
could cause the problem as well as anything around U6.

Good luck!

73,
Marsh, NC7V

--- In softrock40@..., EricJ <eric_ke6us@y...> wrote:

I'll give it a try. I put a scope on I and Q earlier
in the day and discovered more than a small difference
between the two. More like a 50% difference. That
seems excessive, and might suggest something wrong
with U6. Components are all correct value in correct
position.

Thanks, Gene.

Eric
KE6US
www.ke6us.com

--- gene_scot <gmarcus@k...> wrote:

Eric,

There may be a small difference in the Softrock40 I
and Q amplitude
that is out of range of the DSP gain/phase
adjustments. I would
suggest opening your computer's Recording Control
window and adjust
the Line Input Balance Control and see if that
allows you null the
image. You will probably have to back to DSP Image
Reject adjustment
to realize a greater than 50 dB null.

I hope this helps.

73,

Gene W3PM GM4YRE

--- In softrock40@..., "Eric"
<eric_ke6us@y...> wrote:

The radio went together fairly easily, though I'm

at

a loss to figure out why an experimenter's radio

is

jammed onto such a small board. This might be OK

for

a production rig, but some room would be nice to
experiment.

That said, the radio works except there is no

image

rejection and the DSP image rejection controls do
nothing. The instructions say, "If the image

cannot

be nulled at least 50 db, then a problem

exists..."

Well, some guidance would have been helpful.
Especially, given my opening criticism.

I am reluctant to tear into this think quite yet

as

there is not a lot of room to work. I originally
thought it may be a transformer mis-wiring on my

part.

Again, we're talking an experimenter's radio on 40
meters where things are relatively less critical

than

other bands, so a little larger toroid with more

room

to make changes would make it a lot easier.

I'm hoping when I fix the image problem that all
that 7.056 +/- 5 khz energy is going to at least

be

diminished. 7.056 is S5. 7.051/7.061 are S3.

Anyway, I have no doubt the problem is my error. I
just want a little direction so that I can

minimize

stress on the board.

Eric
KE6US
www.ke6us.com

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I'll give it a try. I put a scope on I and Q earlier
in the day and discovered more than a small difference
between the two. More like a 50% difference. That
seems excessive, and might suggest something wrong
with U6. Components are all correct value in correct
position.

Thanks, Gene.

Eric
KE6US
www.ke6us.com

--- gene_scot <gmarcus@...> wrote:

Eric,

There may be a small difference in the Softrock40 I
and Q amplitude
that is out of range of the DSP gain/phase
adjustments. I would
suggest opening your computer's Recording Control
window and adjust
the Line Input Balance Control and see if that
allows you null the
image. You will probably have to back to DSP Image
Reject adjustment
to realize a greater than 50 dB null.

I hope this helps.

73,

Gene W3PM GM4YRE

--- In softrock40@..., "Eric"
<eric_ke6us@y...> wrote:

The radio went together fairly easily, though I'm

at

a loss to figure out why an experimenter's radio

is

jammed onto such a small board. This might be OK

for

a production rig, but some room would be nice to
experiment.

That said, the radio works except there is no

image

rejection and the DSP image rejection controls do
nothing. The instructions say, "If the image

cannot

be nulled at least 50 db, then a problem

exists..."

Well, some guidance would have been helpful.
Especially, given my opening criticism.

I am reluctant to tear into this think quite yet

as

there is not a lot of room to work. I originally
thought it may be a transformer mis-wiring on my

part.

Again, we're talking an experimenter's radio on 40
meters where things are relatively less critical

than

other bands, so a little larger toroid with more

room

to make changes would make it a lot easier.

I'm hoping when I fix the image problem that all
that 7.056 +/- 5 khz energy is going to at least

be

diminished. 7.056 is S5. 7.051/7.061 are S3.

Anyway, I have no doubt the problem is my error. I
just want a little direction so that I can

minimize

stress on the board.

Eric
KE6US
www.ke6us.com

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Eric,

There may be a small difference in the Softrock40 I and Q amplitude
that is out of range of the DSP gain/phase adjustments. I would
suggest opening your computer's Recording Control window and adjust
the Line Input Balance Control and see if that allows you null the
image. You will probably have to back to DSP Image Reject adjustment
to realize a greater than 50 dB null.

I hope this helps.

73,

Gene W3PM GM4YRE

despense some onto a toothpick to apply. Pretty messy
that way, but with a little patience I got by.

Thanks Dave.

It is pretty toxic stuff too, and dispensing with a toothpick is going to mean wiping the toothpick onto something once in awhile to keep the toothpick clean and prevent a big glob of it from forming on the tip.

I was hoping for something a bit more elegant in terms of the dispenser, but not elegant to the point of costing 200 dollars just for the micro dispensing hardware.

My original sample came in a syringe and was perfect for doing DIP packages and through hole type components. A smaller syringe might be better....but can't imagine it being fine enough for smt dispensing.

Thanks,

Art


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Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.11.3/107 - Release Date: 9/20/2005

Wow, Art, you scared me for a moment. I once saw a
brand new Heathkit HW-101 that a young new ham had
assembled using the plastic type "liquid solder". It
never did work.

I've had limited success using solder paste in a
plastic oral syringe given to me by a friendly
pharmacist. It's hardly small enough for any type of
precision, but at least it's controllable and useable
for small jobs or repairs. You nearly have to
despense some onto a toothpick to apply. Pretty messy
that way, but with a little patience I got by.

73,
Dave W5DHM

--- KY1K <ky1k@...> wrote:

Hi All,

I have been using liquid solder (paste) with great
success. 5 years
ago, I started out with a sample sent to me for free
by a vendor. It
was sent without an applicator, so using it on
really small smt was
impossible, couldn't apply small amounts of solder
without the
special (and pricey) micro-applicator.

The stuff was great, I used it with a conventional
Weller soldering
station and with the pyropen hot air 'iron'. It was
supposed to have
a 3 month shelf life, but I stored it in the
refrigerator and it has
lasted 5 years although it has degraded to the point
where I wouldn't
trust it on smt.

So, I need to buy more liquid solder and want a more
modest quantity,
and something that comes with an inexpensive
applicator so it will
dispense small amounts needed for smt pads.

Any suggestion as to which product to buy and where
to buy it???
Please, no Radio Shack recommends, been there, done
that...I've got
questions, they have blank stares:>: Reputable
vendors only please.

Thanks,

Art


--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.11.3/107 -
Release Date: 9/20/2005

__________________________________
Yahoo! Mail - PC Magazine Editors' Choice 2005

Hi All,

I have been using liquid solder (paste) with great success. 5 years ago, I started out with a sample sent to me for free by a vendor. It was sent without an applicator, so using it on really small smt was impossible, couldn't apply small amounts of solder without the special (and pricey) micro-applicator.

The stuff was great, I used it with a conventional Weller soldering station and with the pyropen hot air 'iron'. It was supposed to have a 3 month shelf life, but I stored it in the refrigerator and it has lasted 5 years although it has degraded to the point where I wouldn't trust it on smt.

So, I need to buy more liquid solder and want a more modest quantity, and something that comes with an inexpensive applicator so it will dispense small amounts needed for smt pads.

Any suggestion as to which product to buy and where to buy it??? Please, no Radio Shack recommends, been there, done that...I've got questions, they have blank stares:>: Reputable vendors only please.

Thanks,

Art


--
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.344 / Virus Database: 267.11.3/107 - Release Date: 9/20/2005

Completed assembly several days ago. Currently Using I2PHD's
program which I had already installed on my PC
for experimenting with the R2PRO.

Was able to get at least 50dB of image rejection by carefully adjusting
the amplitude and time delay settings in the program's control panel.

Thanks to all involved for this interesting project

73,
Bob Johansen WB2SRF

Good, makes sense.

The card is trying to read micro-volt signals, the ground used for power in a PC is horrible as far as noise is concerned. To make matters worse the power supply ground is connected to earth ground so there and lots of ways to get ground loops. The only way on a PC to eliminate a lot of that is to have the device not be powered by the filthy dirty signals of the PC.

You should have one ground connection between the SR-40 and the PC, using the signal cable(power should not be flowing), and the power of the two units should be totally separate. That will cut down 60 Hz hum and it's harmonics.

--
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 ...

Good Morning Group,

I have sent the following to a number of hams having the same
problem mentioned by serveral in the group. Every SoftRock I have
built (30+ and lost count) has worked properly, some with extra
effort.

73,
Tony KB9YIG

Not being able to null the image has usually been associated with
the I and
Q signals being crossed or one missing. Check to make sure the
stereo cable
is connected to the board with the stereo connector tip to C18, the
via
nearest the corner board mounting hole. Check with a meter to make
sure
there is nothing to short one of the I or Q signals to ground.
Also, if the QSD circuit
is not getting one of the clock phases, open at a IC pin or short
between
pins, it can result an unbalance between the I and Q signals such
that one can not get a null. Solder bridges between IC pins can
be hard to see without looking with good lighting and magnification.

The voltage gain from RF in to I or Q audio outputs is on the order
of 40-45 v/v.

--- In softrock40@..., John <digi9345@y...> wrote:

Eric,
It sounds as though you and I are in the same predicament.

The SR40 is working pretty good but the image rejection controls
have no affect. Be sure to let us know if you come up with a fix.

John [K7SVV]

EricJ <eric_ke6us@y...> wrote:
The radio went together fairly easily, though I'm at
a loss to figure out why an experimenter's radio is
jammed onto such a small board. This might be OK for
a production rig, but some room would be nice to
experiment.

That said, the radio works except there is no image
rejection and the DSP image rejection controls do
nothing. The instructions say, "If the image cannot
be nulled at least 50 db, then a problem exists..."
Well, some guidance would have been helpful.
Especially, given my opening criticism.

I am reluctant to tear into this think quite yet as
there is not a lot of room to work. I originally
thought it may be a transformer mis-wiring on my part.

Again, we're talking an experimenter's radio on 40
meters where things are relatively less critical than
other bands, so a little larger toroid with more room
to make changes would make it a lot easier.

I'm hoping when I fix the image problem that all
that 7.056 +/- 5 khz energy is going to at least be
diminished. 7.056 is S5. 7.051/7.061 are S3.

Anyway, I have no doubt the problem is my error. I
just want a little direction so that I can minimize
stress on the board.

Eric
KE6US
www.ke6us.com



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Good Morning Group,

I have sent the following to a number of hams having the same
problem mentioned by serveral in the group. Every SoftRock I have
built (30+ and lost count) has worked properly, some with extra
effort.

73,
Tony KB9YIG

Not being able to null the image has usually been associated with
the I and
Q signals being crossed or one missing. Check to make sure the
stereo cable
is connected to the board with the stereo connector tip to C18, the
via
nearest the corner board mounting hole. Check with a meter to make
sure
there is nothing to short one of the I or Q signals to ground.
Also, if the QSD circuit
is not getting one of the clock phases, open at a IC pin or short
between
pins, it can result an unbalance between the I and Q signals such
that one can not get a null. Solder bridges between IC pins can
be hard to see without looking with good lighting and magnification.

The voltage gain from RF in to I or Q audio outputs is on the order
of 40-45 v/v.

--- In softrock40@..., John <digi9345@y...> wrote:

Eric,
It sounds as though you and I are in the same predicament.

The SR40 is working pretty good but the image rejection controls
have no affect. Be sure to let us know if you come up with a fix.

John [K7SVV]

EricJ <eric_ke6us@y...> wrote:
The radio went together fairly easily, though I'm at
a loss to figure out why an experimenter's radio is
jammed onto such a small board. This might be OK for
a production rig, but some room would be nice to
experiment.

That said, the radio works except there is no image
rejection and the DSP image rejection controls do
nothing. The instructions say, "If the image cannot
be nulled at least 50 db, then a problem exists..."
Well, some guidance would have been helpful.
Especially, given my opening criticism.

I am reluctant to tear into this think quite yet as
there is not a lot of room to work. I originally
thought it may be a transformer mis-wiring on my part.

Again, we're talking an experimenter's radio on 40
meters where things are relatively less critical than
other bands, so a little larger toroid with more room
to make changes would make it a lot easier.

I'm hoping when I fix the image problem that all
that 7.056 +/- 5 khz energy is going to at least be
diminished. 7.056 is S5. 7.051/7.061 are S3.

Anyway, I have no doubt the problem is my error. I
just want a little direction so that I can minimize
stress on the board.

Eric
KE6US
www.ke6us.com



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To unsubscribe from this group, send an email to:
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---------------------------------




John
K7SVV
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