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Date: Sun, 23 Feb 2014 19:47:13 +0100
From: wolf_dl4yhf <dl4yhf@freenet.de>
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References: <530A3920.9020308@iup.uni-heidelberg.de> <08C9605D129D408EA502F9E9CECE649A@F6CNI> <530A3F59.2030807@iup.uni-heidelberg.de>
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Subject: Re: LF: WSPR MF QRPPPPP by DK7FC ??
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All seem to use similar output powers now.. at least 'seen from a 
distance', hi:

1838 -17 -0.5   0.475690  0 DK7FC JN49 30
1840 -13  4.0   0.475611  0 IW4DXW JN64 43
1840 -18 -1.0   0.475642  0 G3WCB IO91 23
1840 -18 -0.6   0.475690  0 DK7FC JN49 30
1842  -1 -0.5   0.475658  0 F5WK JN18 27
1842 -21 -1.3   0.475720  0 DL8YCA JO31 10

73 + GL,
   Wolf .

Am 23.02.2014 19:35, schrieb schaefer:
> Hello Andy,
>
> Well, the lowest range for the antenna current is 5A and the needle of 
> the analog meter does not move at all. It must be less than 50 mA.
> The power drops more and more now since the battery is empty. Still 
> 1.85 V and F5WK detects me! :-)
>
> 73, Stefan
>
> Am 23.02.2014 19:25, schrieb André Guyé:
>> Ok Stefan,
>> here hard to copy you because your TX frequency is not clear at this 
>> moment.
>> Please, what is the current intensity at the base of the antenna ?
>> Andy.
>> *From:* schaefer <mailto:schaefer@iup.uni-heidelberg.de>
>> *Sent:* Sunday, February 23, 2014 7:08 PM
>> *To:* rsgb_lf_group@blacksheep.org <mailto:rsgb_lf_group@blacksheep.org>
>> *Subject:* LF: WSPR MF QRPPPPP by DK7FC ??
>> Hello all,
>>
>> You all know me as a QRP station :-) But today i want to run even 
>> less power!
>>
>> While running in the sunny afternoon i got the idea to build a very 
>> small and weak PA. After some playing arround it came to me that it 
>> will be a class-E PA. The power supply should be a lemon battery, 
>> i.e. a homemade galvanic element, maybe 2 in series!
>>
>> The desired RF power is arround 20...40 mW, at 2 V DC. And i'm using 
>> a BS170 
>> <https://dl.dropboxusercontent.com/u/19882028/Datenbl%C3%A4tter/BS170.pdf> 
>> MOSFET for that PA. The biggest part will be the BNC jack :-)
>>
>> So far i'm testing with an empty 9V battery and a 100 Ohm resistor in 
>> series. I measured 2V and 35mA. But the PA is not yet aligned for 
>> class E mode. Probably the efficiency is less than 50% in the moment.
>>
>> Anyway several stations seem to copy me :-)
>>
>> More reporting stations are apprechiated, if you like to test your 
>> sensitive RX :-)
>>
>> 73, Stefan/DK7FC
>>
>> PS: Later, i want to try to rectify some RF coming from AFN to my 
>> antenna. It this is fed to a 10F gold cap and WSPR-2 in 33% ratio is 
>> sent, maybe i can run that PA from the energy of AFN :-)
>>
>>
>>
>> ------------------------------------------------------------------------
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>>
>> Ce courrier électronique ne contient aucun virus ou logiciel 
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>> <http://www.avast.com/> est active.
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    <div class="moz-cite-prefix">All seem to use similar output powers
      now.. at least 'seen from a distance', hi:<br>
      <br>
      1838 -17 -0.5   0.475690  0 DK7FC JN49 30<br>
      1840 -13  4.0   0.475611  0 IW4DXW JN64 43<br>
      1840 -18 -1.0   0.475642  0 G3WCB IO91 23<br>
      1840 -18 -0.6   0.475690  0 DK7FC JN49 30<br>
      1842  -1 -0.5   0.475658  0 F5WK JN18 27<br>
      1842 -21 -1.3   0.475720  0 DL8YCA JO31 10<br>
      <br>
      73 + GL,<br>
        Wolf .<br>
      <br>
      Am 23.02.2014 19:35, schrieb schaefer:<br>
    </div>
    <blockquote cite="mid:530A3F59.2030807@iup.uni-heidelberg.de"
      type="cite">
      <meta content="text/html; charset=ISO-8859-15"
        http-equiv="Content-Type">
      Hello Andy, <br>
      <br>
      Well, the lowest range for the antenna current is 5A and the
      needle of
      the analog meter does not move at all. It must be less than 50 mA.<br>
      The power drops more and more now since the battery is empty.
      Still
      1.85 V and F5WK detects me! :-)<br>
      <br>
      73, Stefan<br>
      <br>
      Am 23.02.2014 19:25, schrieb André Guyé:
      <blockquote cite="mid:08C9605D129D408EA502F9E9CECE649A@F6CNI"
        type="cite">
        <meta content="text/html; charset=ISO-8859-15"
          http-equiv="content-type">
        <div dir="ltr">
          <div style="font-size: 12pt; font-family: 'Calibri'; color:
            rgb(0, 0, 0);">
            <div>Ok Stefan,</div>
            <div> </div>
            <div>here hard to copy you because your TX frequency is not
              clear at
              this moment.</div>
            <div> </div>
            <div>Please, what is the current intensity at the base of
              the antenna
              ?</div>
            <div> </div>
            <div>Andy.</div>
            <div style="font-size: small; text-decoration: none;
              font-family: &quot;Calibri&quot;; font-weight: normal;
              color: rgb(0, 0, 0); font-style: normal; display: inline;">
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                  <div style=""><b>From:</b> <a moz-do-not-send="true"
                      title="schaefer@iup.uni-heidelberg.de"
                      href="mailto:schaefer@iup.uni-heidelberg.de">schaefer</a>
                  </div>
                  <div><b>Sent:</b> Sunday, February 23, 2014 7:08 PM</div>
                  <div><b>To:</b> <a moz-do-not-send="true"
                      title="rsgb_lf_group@blacksheep.org"
                      href="mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@blacksheep.org</a>
                  </div>
                  <div><b>Subject:</b> LF: WSPR MF QRPPPPP by DK7FC ??</div>
                </div>
              </div>
              <div> </div>
            </div>
            <div style="font-size: small; text-decoration: none;
              font-family: &quot;Calibri&quot;; font-weight: normal;
              color: rgb(0, 0, 0); font-style: normal; display: inline;">Hello
all,
              <br>
              <br>
              You all know me as a QRP station :-) But today i want to
              run even less
              power!<br>
              <br>
              While running in the sunny afternoon i got the idea to
              build a very
              small and weak PA. After some playing arround it came to
              me that it
              will be a class-E PA. The power supply should be a lemon
              battery, i.e.
              a homemade galvanic element, maybe 2 in series!<br>
              <br>
              The desired RF power is arround 20...40 mW, at 2 V DC. And
              i'm using a <a moz-do-not-send="true"
href="https://dl.dropboxusercontent.com/u/19882028/Datenbl%C3%A4tter/BS170.pdf">BS170</a>
              MOSFET for that PA. The biggest part will be the BNC jack
              :-)<br>
              <br>
              So far i'm testing with an empty 9V battery and a 100 Ohm
              resistor in
              series. I measured 2V and 35mA. But the PA is not yet
              aligned for class
              E mode. Probably the efficiency is less than 50% in the
              moment. <br>
              <br>
              Anyway several stations seem to copy me :-)<br>
              <br>
              More reporting stations are apprechiated, if you like to
              test your
              sensitive RX :-)<br>
              <br>
              73, Stefan/DK7FC<br>
              <br>
              PS: Later, i want to try to rectify some RF coming from
              AFN to my
              antenna. It this is fed to a 10F gold cap and WSPR-2 in
              33% ratio is
              sent, maybe i can run that PA from the energy of AFN :-)<br>
              <br>
            </div>
          </div>
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