From: DK7FC <73dk7fc@googlemail.com>
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Date: Fri, 27 Mar 2015 14:27:50 +0100
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Subject: Re: LF: Re: TXing WSPR on 630m on a Raspberry Pi, Stefan in QRP...
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Hi Andy,

Am 27.03.2015 11:26, schrieb Guyé André:
> If you want to have real QRPP test, you can test WSPR at 500 micro 
> watt PAR, and still have lucky reports up to 1500 km.

Oh, that will highly depend on your location i think. Maybe we are in 
about the same situation whereas PA stns are advanced :-)

Another interesting test is to have lucky reports up to 1500 W ;-)

Now i want to try to wind a trifilar winding on the FT50-77 to get an 
opposite phase signal to drive my 12V/100W PA from the Raspi. And i 
wrote an email to PE1NNZ and asked to a modification of the C-program to 
generate a signal with 4x higher FSK shift. Then it it would be possible 
to use that version for OMs having a divide-by-4 stage in their PA (to 
get a perfect 50% duty cycle and rectangular shape (after passing 
optocouplers etc)). This would be a safe way to drive my QRP PA, 
testwise of course...

Good luck with your experiments.

73, Stefan

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Hi Andy, <br>
<br>
Am 27.03.2015 11:26, schrieb Guyé André:
<blockquote cite="mid:520562D5C7694FF69C20E595E00B793D@F6CNIToshiba"
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  <div
 style="font-size: 12pt; font-family: 'Calibri'; color: rgb(0, 0, 0);">If
you want to have real QRPP test, you can test WSPR at 500 micro watt
PAR, and still have lucky reports up to 1500 km.<br>
  </div>
  </div>
</blockquote>
<br>
Oh, that will highly depend on your location i think. Maybe we are in
about the same situation whereas PA stns are advanced :-)<br>
<br>
Another interesting test is to have lucky reports up to 1500 W ;-)<br>
<br>
Now i want to try to wind a trifilar winding on the FT50-77 to get an
opposite phase signal to drive my 12V/100W PA from the Raspi. And i
wrote an email to PE1NNZ and asked to a modification of the C-program
to generate a signal with 4x higher FSK shift. Then it it would be
possible to use that version for OMs having a divide-by-4 stage in
their PA (to get a perfect 50% duty cycle and rectangular shape (after
passing optocouplers etc)). This would be a safe way to drive my QRP
PA, testwise of course...<br>
<br>
Good luck with your experiments. <br>
<br>
73, Stefan<br>
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