[Skimmertalk] Barking up wrong tree ? Flex and CW Skimmer Alignment (again!)

Andrew O'Brien k3ukandy at gmail.com
Sat Jun 15 08:00:09 EDT 2013

I'm still working on it, but it seems to be working today!  It was a
strange phenomenon  replicated  on different machines. I suspect is not RBN
or Flex related but something related to a VAC setting and CW Skimmer.

Andy K3UK

On Sat, Jun 15, 2013 at 7:32 AM, Pete Smith N4ZR <n4zr at contesting.com>wrote:

>  Thanks for reporting this, Andy.  I don't think it is the RBN that's
> off, because each RBN station independently makes its own reading of the
> spotted station's frequency, and we don't tamper with that at the server.
> We do dynamically check spots made by each station with a complex dynamic
> network of reference stations (also on the RBN), and quickly notify anyone
> who is off-frequency by more than +/- 0.2 KHz.
> I suspect this is something in your Flex setup, but I can't begin to guess
> what it might be.  Have you talked to VE2WU? Marten has a Skimmer running
> on his Flex, with no big frequency discrepancies.
> 73, Pete N4ZR
> Check out the Reverse Beacon Network at http://reversebeacon.net,
> blog at reversebeacon.blogspot.com.
> For spots, please go to your favorite
> ARC V6 or VE7CC DX cluster node.
> On 6/14/2013 7:11 PM, Andrew O'Brien wrote:
> You may recall a thread a couple of weeks ago about getting the frequency
> readout of a Flex radio to match the frequency reported in CW Skimmer.
>  I've set up three different Flex radios (one 1500, two 3000's) on 4
> different computers following detailed instructions for PowerSDR, Cw
> Skimmer, and VAC. I concluded that none were aligned correctly but now I am
> wondering if my reference point is what is throwing me off.  If I decode a
> CW signal with the new Flex 3000 , the frequency read out of the Flex and
> Cw Skimmer are aligned correctly. However, when I check reports on the
> reverse beacon network from OTHER stations, the reported signal differs
> from my radio substantially.  It seems to me that the reverse beacon folks
> are reporting the wrong frequency.  However, I know the RBN folks take
> accuracy seriously.
> Example  YU6DX is reported by RBN
> dxfreqcq/dxsnrspeedtimeDF7GB <http://www.reversebeacon.net/qrz/rbn/DF7GB> <http://www.reversebeacon.net/qrz/rbn/DF7GB>
> YU6DX <http://www.reversebeacon.net/qrz/rbn/YU6DX> <http://www.reversebeacon.net/qrz/rbn/YU6DX>14006.1CW CQ12 dB32 wpm2304z
> 14 JunON5KQ <http://www.reversebeacon.net/qrz/rbn/ON5KQ> <http://www.reversebeacon.net/qrz/rbn/ON5KQ>
> YU6DX<http://www.reversebeacon.net/qrz/rbn/YU6DX> <http://www.reversebeacon.net/qrz/rbn/YU6DX>
> 14006.0CW CQ20 dB32 wpm2304z 14
> JunW4KAZ<http://www.reversebeacon.net/qrz/rbn/W4KAZ> <http://www.reversebeacon.net/qrz/rbn/W4KAZ>
>  YU6DX <http://www.reversebeacon.net/qrz/rbn/YU6DX> <http://www.reversebeacon.net/qrz/rbn/YU6DX>14006.0CW CQ36 dB32 wpm2304z
> 14 Jun
> but I am seeing him at 14057 , that is a BIG difference.  If I tune to WWV
> at 10 and 15  mHZ, the WWV signal is aligned in both PowerSDR and CW
> Skimmer at the correct frequency.
> No spur reduction here, running CW-U in PowerSDR.
> ANdu K3UK
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