[Skimmertalk] CWS and PowerSDR again..

Andrew O'Brien k3ukandy at gmail.com
Fri Jan 1 20:20:20 EST 2016

I have the problem, almost solved.  I did also hear from 2-3 other that
have a similar problem.  CW Skimmer works fine with my other SDR radios, so
the issue is specific to Flex radios and probably PowerSDR .  Anyway, after
going back to basics I have it close to working by following instructions.
The only thing remaining to be solved is the fact that when I click on a
 stream within CW Skimmer the Skimmer and PowerSDR frequencies shift
correctly but the desired morse code stream is not close enough to display
in the decode window . However this is random,  2-3 more attempts causes it
to be perfect.  I suspect a polling issue, possibly DDutil or VSPM
related.  Still working on it.
For those with this problem my trouble shooting reveals...
CW Skimmer settings ... Radio= Soft rock-IF. CW Pitch = 600. IF Hz = 9600 .
Sample Rate 4800 .
PowerSDR setting : Sample Rate =4800 . VAC Direct box checked, Calibrate IQ
box checked. IF Hz =9000 (in expert area).

Andy K3UK

On Fri, Jan 1, 2016 at 5:08 PM, Pete Smith N4ZR <n4zr at contesting.com> wrote:

> Andy, you might want to be in touch with VE2WU,  I believe he has had some
> similar issues and might be able to help.  You might also re[ost this on
> the RBN-OPS at yahoogroups.com reflector, which is rather larger than the
> Skimmertalk group.
> 73, Pete N4ZR
> Download the new N1MM Logger+ at
> <http://N1MM.hamdocs.com>. Check
> out the Reverse Beacon Network at
> <http://reversebeacon.net>, now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
> On 1/1/2016 3:45 PM, Andrew O'Brien wrote:
>> I often have months where CW Skimmer, PowerSDR and my Flex 3K work
>> together
>> perfectly. Then inexplicably the display in CW Skimmer is WAY OFF the
>> actual frequency and no amount of logical adjustments solve the problem.
>> Then, perhaps a few days after I have given up following hours of trying
>> to
>> fix, all is magically working again. Today, while PowerSDR is tuned to
>> 7050
>> CW , Cw Skimmer is displaying the tell-tale images of JT65A that reside at
>> 7076!
>> So, since many posts about correct configuration are old links, I wanted
>> to
>> double check my assumptions about correctly align CW Skimmer with
>> PowerSDR.
>> Comments appreciated .
>> In PowerSDR ... (General tab) IF Hz = 9000 . (Audio Tab) OUTPUT TO VAC
>> Checked .
>> In CW Skimmer SOFTROCK-IF selected . CW Pitch 600, Audio IF Hz = 9000
>> Anything obvious missing ?
>> Sometimes when off by many Khz, I can get close by changing the audio IF
>> in
>> CW Skimmer. I trim it up or down by a few hundred Hz, but just as I think
>> I
>> am getting close, it zooms to a WAY off range again. If I leave it for a
>> few days, it seems to fix self.  Clicking on a stream within CW Skimmer
>> causes skimmer to move up or down, so you never land on a desired stream.
>> Others report this issue too.
>> Andy K3UK
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