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 <4619df50-a672-49c1-0c7b-5c4e09929e9e@mbsks.franken.de>
To: rsgb_lf_group@blacksheep.org
From: Roland Bruestle <r@mbsks.franken.de>
Message-ID: <4181b8cd-59b9-a8a7-84a1-41bb78de45d2@mbsks.franken.de>
Date: Fri, 13 May 2016 09:53:28 +0200
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In-Reply-To: <4619df50-a672-49c1-0c7b-5c4e09929e9e@mbsks.franken.de>
Subject: LF: DL3NDR back on 8270kHz
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Hi,
sorry a correction: it is not IC: Texas DTA8950 it is Texas TAS5630
Roland

Am 13.05.2016 um 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">Hi,<br>
      sorry a correction: it is not IC: Texas DTA8950 it is Texas
      TAS5630<br>
      Roland<br>
      <br>
      Am 13.05.2016 um 09:36 schrieb Roland Bruestle:<br>
    </div>
    <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>
    <p><br>
    </p>
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