From: DK7FC <73dk7fc@googlemail.com>
Message-ID: <55157580.9090209@gmail.com>
Date: Fri, 27 Mar 2015 16:21:36 +0100
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Subject: LF: MF WSPR
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Just FYI, i switched to my normal "1W" ERP on MF because i need the 
Raspi for some other tests.
I see there are quite many stns "listening" to that time. Obviously it 
becomes an active MF evening!
Unfortunately i have no time this evening (party) so i cannot join the 
CW folks :-( But tomorrow!! :-)

73, GL, Stefan

Am 27.03.2015 14:53, schrieb DK7FC:
>
> Am 27.03.2015 14:43, schrieb Rik Strobbe:
>>
>> Hi Stefan, all,
>>
>> /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...
>> /
>> I have written such a program for windows (actually you can set 
>> the devider ratio to any number between 1 and 100).
>> That way any HF TRX can be used to gerate a MF (or 
>> LF) WSPR signal with a simple CMOS ot TTL divider IC.
>> If anyone is interested just let me know ...
>> 73, Rik  ON7YD - OR7T
>
> Hi Rik,
>
> Sounds good but how does the windows PC generate the RF? You know, the 
> Raspi directly generates a "tone" at 475 kHz (or any other frequency 
> up to 250 MHz), not at 1500 Hz.
> Anyway it is interesting. Does your program provide time sync and a 
> GUI to type callsign/locator/erp and a "duty cycle"?
>
> 73, Stefan

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Just FYI, i switched to my normal "1W" ERP on MF because i need the
Raspi for some other tests. <br>
I see there are quite many stns "listening" to that time. Obviously it
becomes an active MF evening! <br>
Unfortunately i have no time this evening (party) so i cannot join the
CW folks :-( But tomorrow!! :-)<br>
<br>
73, GL, Stefan<br>
<br>
Am 27.03.2015 14:53, schrieb DK7FC:
<blockquote cite="mid:551560D0.1040306@gmail.com" type="cite">
  <meta content="text/html; charset=ISO-8859-1"
 http-equiv="Content-Type">
  <br>
Am 27.03.2015 14:43, schrieb Rik Strobbe:
  <blockquote
 cite="mid:7E7DFBB4D102A04DB5ADC88D66628A4A234F1AFC@ICTS-S-MBX1.luna.kuleuven.be"
 type="cite">
    <meta http-equiv="Content-Type"
 content="text/html; charset=ISO-8859-1">
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    <div
 style="font-family: Tahoma; direction: ltr; color: rgb(0, 0, 0); font-size: 10pt;">
    <p>Hi&nbsp;Stefan, all,</p>
    <p>&nbsp;</p>
    <div><em><font color="#0000ff">And i&nbsp;wrote&nbsp;an email to&nbsp;PE1NNZ
and&nbsp;asked to a&nbsp;modification of the&nbsp;C-program to&nbsp;generate
a&nbsp;signal&nbsp;with&nbsp;4x&nbsp;higher&nbsp;FSK
shift.&nbsp;Then&nbsp;it&nbsp;it&nbsp;would&nbsp;be&nbsp;possible to&nbsp;use&nbsp;that&nbsp;version&nbsp;for&nbsp;OMs&nbsp;having
a&nbsp;divide-by-4 stage in&nbsp;their PA (to&nbsp;get a perfect 50%&nbsp;duty&nbsp;cycle
and&nbsp;rectangular&nbsp;shape (after passing&nbsp;optocouplers etc)).&nbsp;This&nbsp;would&nbsp;be
a safe&nbsp;way to drive&nbsp;my&nbsp;QRP PA,&nbsp;testwise of course...<br>
    </font></em><br>
I have&nbsp;written&nbsp;such a&nbsp;program&nbsp;for&nbsp;windows&nbsp;(actually&nbsp;you&nbsp;can set
the&nbsp;devider ratio to&nbsp;any&nbsp;number&nbsp;between 1&nbsp;and 100).</div>
    <div>That&nbsp;way&nbsp;any HF&nbsp;TRX&nbsp;can&nbsp;be&nbsp;used to&nbsp;gerate a&nbsp;MF (or
LF)&nbsp;WSPR&nbsp;signal&nbsp;with
a&nbsp;simple&nbsp;CMOS&nbsp;ot&nbsp;TTL&nbsp;divider IC.</div>
    <div>If&nbsp;anyone is&nbsp;interested&nbsp;just let me&nbsp;know ...</div>
    <div>&nbsp;</div>
    <div>73, Rik&nbsp;&nbsp;ON7YD - OR7T</div>
    </div>
  </blockquote>
&nbsp;<br>
Hi Rik, <br>
  <br>
Sounds good but how does the windows PC generate the RF? You know, the
Raspi directly generates a "tone" at 475 kHz (or any other frequency up
to 250 MHz), not at 1500 Hz.<br>
Anyway it is interesting. Does your program provide time sync and a GUI
to type callsign/locator/erp and a "duty cycle"?<br>
  <br>
73, Stefan<br>
  <blockquote
 cite="mid:7E7DFBB4D102A04DB5ADC88D66628A4A234F1AFC@ICTS-S-MBX1.luna.kuleuven.be"
 type="cite"> </blockquote>
</blockquote>
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