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Date: Fri, 13 May 2016 18:21:39 +0200
From: DK7FC <selberdenken@posteo.de>
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In-Reply-To: <4619df50-a672-49c1-0c7b-5c4e09929e9e@mbsks.franken.de>
Subject: Re: VLF: 8.27
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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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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>
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