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From: Roland Bruestle <r@mbsks.franken.de>
Message-ID: <f87c9c7d-5ca7-c398-7297-912bbc96b6ab@mbsks.franken.de>
Date: Fri, 13 May 2016 18:48:53 +0200
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Subject: Re: VLF: 8.27
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Hello Stefan,
ok, it should be 8270kHz.
I have now decreased theturns on the primary winding.
The antenna current is now 350mA, input power to the PA is 150W.
Cooler temperature remains still 37°C.
The transmission is finished since 15:00 UTC. I hope you can give me 
some report.
Are you using a Mini Whip for receiving? I will try to receive you on 
you next transmissions.
73,
  Roland

Am 13.05.2016 um 18:21 schrieb DK7FC:
> Hello Roland,
>
> 8170kHz?
> I have the EW loop connected on the tree. Don't hesitate to run a 
> carrier during the morning hours, 4...10 UTC is a good time as you can 
> see. With some luck i will see you in the 424 uHz window. That would 
> be remarkable.
>
> 73, GL, Stefan
>
> Am 13.05.2016 09:36, schrieb Roland Bruestle:
>> Hello Markus, Stefan, Paul,
>> I'm back at 8170kHz and using now a class D Amplifier. You can see me 
>> at Markus Grabber.
>> Amplifier :
>> max. power on 2 Ohm: 500W
>> mac. power on 4 Ohm: 250W
>> Power supply range. 20..48V
>> Switching frequency: 400kHz
>> IC: Texas DTA8950
>> IC is fan cooled
>> Price,  mono mode: Ebay, 50 €
>>
>> My actual values:
>> Power supply: 30V, 3A = 90W
>> PA output about 80W
>> Antenna current: 250mA
>> Temperature of cooler: 37°C
>> Fan mostly switched off
>>
>> For more power I have to increase the voltage of power supply or to 
>> lower the primary turns of the transformer.
>> 300Ws should be not a problem.
>>
>> For receiving I wont to use a min whip. I hope that the noise is not 
>> to high.
>>
>> 73
>> Roland DL3NDR


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    <div class="moz-cite-prefix">Hello Stefan,<br>
      ok, it should be 8270kHz.<br>
      I have now decreased the<tt> turns on the primary winding.<br>
        The antenna current is now 350mA, input power to the PA is 150W.<br>
        Cooler temperature remains still 37°C.<br>
        The transmission is finished since 15:00 UTC. I hope you can
        give me some report.<br>
        Are you using a Mini Whip for receiving? I will try to receive
        you on you next transmissions.<br>
        73,<br>
         Roland <br>
      </tt><br>
      Am 13.05.2016 um 18:21 schrieb DK7FC:<br>
    </div>
    <blockquote cite="mid:5735FF13.7070505@posteo.de" type="cite">
      <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
      Hello Roland, <br>
      <br>
      8170kHz?<br>
      I have the EW loop connected on the tree. Don't hesitate to run a
      carrier during the morning hours, 4...10 UTC is a good time as you
      can
      see. With some luck i will see you in the 424 uHz window. That
      would be
      remarkable.<br>
      <br>
      73, GL, Stefan<br>
      <br>
      Am 13.05.2016 09:36, schrieb Roland Bruestle:
      <blockquote
        cite="mid:4619df50-a672-49c1-0c7b-5c4e09929e9e@mbsks.franken.de"
        type="cite">
        <meta content="text/html; charset=utf-8"
          http-equiv="Content-Type">
        Hello Markus, Stefan, Paul,<br>
        I'm back at 8170kHz and using now a class D Amplifier. You can
        see me
        at Markus Grabber.<br>
        Amplifier :<br>
        max. power on 2 Ohm: 500W<br>
        mac. power on 4 Ohm: 250W<br>
        Power supply range. 20..48V<br>
        Switching frequency: 400kHz<br>
        IC: Texas DTA8950<br>
        IC is fan cooled<br>
        Price,  mono mode: Ebay, 50 €<br>
        <br>
        My actual values:<br>
        Power supply: 30V, 3A = 90W<br>
        PA output about 80W<br>
        Antenna current: 250mA<br>
        Temperature of cooler: 37°C<br>
        Fan mostly switched off<br>
        <br>
        For more power I have to increase the voltage of power supply or
        to
        lower the primary turns of the transformer.<br>
        300Ws should be not a problem.<br>
        <br>
        For receiving I wont to use a min whip. I hope that the noise is
        not to
        high.<br>
        <br>
        73<br>
        Roland DL3NDR<br>
      </blockquote>
    </blockquote>
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