Message-ID: <5AAAFB72.80406@posteo.de>
Date: Fri, 16 Mar 2018 00:02:10 +0100
From: DK7FC <selberdenken@posteo.de>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <b93789ed-2568-b4ef-49f2-851fd2d50026@bigpond.com> <5A95721D.2060008@posteo.de> <5AAA8DBF.80604@posteo.de>
In-Reply-To: <5AAA8DBF.80604@posteo.de>
Subject: Re: LF: DL to VK7 ?
Content-Type: multipart/alternative;
 boundary="------------090000020702020605020603"
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

This is a multi-part message in MIME format.
--------------090000020702020605020603
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit

Between 22:16...22:36 UTC there was an interruption of the carrier 
transmission, unfortunately.

Am 15.03.2018 16:14, schrieb DK7FC:
> VLF,
>
> Today, i'll start TXing on 17.4701 kHz. Start time is 16 UTC and i 
> intend to run a plain carrier at about 1 A antenna current.
>
> I'm not happy with my linear PA. The efficiency is too bad an i often 
> get dead FETs!! I'm now thinking about a digital solution, a hard 
> keyed class-D PA in combination with a step down converter modulating 
> the supply voltage of the PA. Not a new concept but i never built one 
> of them. Does someone have a circuit recommendation to give some 
> inspiration?
>
> If all works well i'll continue directly with an EbNaut message for 
> Jay and Garry and of course anyone else who is interested:
>
> *f = 17470.1000 Hz
> Start time: 15:Mar.2018  23:30:00 UTC
> Symbol period: 20 s
> Characters: 3
> CRC bits: 24
> Coding 16K21A
> Duration: 05:30:40 [hh:mm:ss]
> Antenna current: 1 A*
>
> 73, Stefan
>
>
>
>
>>
>>
>> Am 27.02.2018 09:23, schrieb Edgar:
>>>
>>> Is it possible?  Reception at Moonah, Tasmania.
>>>
>>>
>>>
>>> Regards, Edgar
>>> Moonah,Tasmania.

--------------090000020702020605020603
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 8bit

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Between 22:16...22:36 UTC there was an interruption of the carrier
transmission, unfortunately.<br>
<br>
Am 15.03.2018 16:14, schrieb DK7FC:
<blockquote cite="mid:5AAA8DBF.80604@posteo.de" type="cite">
  <meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
VLF, <br>
  <br>
Today, i'll start TXing on 17.4701 kHz. Start time is 16 UTC and i
intend to run a plain carrier at about 1 A antenna current. <br>
  <br>
I'm not happy with my linear PA. The efficiency is too bad an i often
get dead FETs!! I'm now thinking about a digital solution, a hard keyed
class-D PA in combination with a step down converter modulating the
supply voltage of the PA. Not a new concept but i never built one of
them. Does someone have a circuit recommendation to give some
inspiration?<br>
  <br>
If all works well i'll continue directly with an EbNaut message for Jay
and Garry and of course anyone else who is interested:<br>
  <br>
  <b>f = 17470.1000 Hz<br>
Start time: 15:Mar.2018  23:30:00 UTC<br>
Symbol period: 20 s<br>
Characters: 3<br>
CRC bits: 24<br>
Coding 16K21A<br>
Duration: 05:30:40 [hh:mm:ss]<br>
Antenna current: 1 A</b><br>
  <br>
73, Stefan<br>
  <br>
  <br>
  <br>
  <br>
  <blockquote cite="mid:5A95721D.2060008@posteo.de" type="cite"><br>
    <br>
Am 27.02.2018 09:23, schrieb Edgar:
    <blockquote
 cite="mid:b93789ed-2568-b4ef-49f2-851fd2d50026@bigpond.com" type="cite">
      <meta http-equiv="content-type" content="text/html; charset=UTF-8">
      <br>
Is it possible?  Reception at Moonah, Tasmania.<br>
      <br>
      <br>
      <br>
Regards, Edgar<br>
Moonah,Tasmania.<br>
    </blockquote>
  </blockquote>
</blockquote>
</body>
</html>

--------------090000020702020605020603--