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Date: Sat, 15 Feb 2014 21:18:55 +0100
From: schaefer <schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: LF Activity - G3XIZ
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Hi Bob, Wolf, LF,

Am 15.02.2014 20:46, schrieb wolf_dl4yhf:
> Hello Bob and all,
>>
>> It's much easier to put a good sigs out on 472 than 137 or 
>> 73.  Countless new modes to use and band conditions much more 
>> predictable on 600 meters.
>
> I agree as far as PEP-versus-ERP is concerned.

Hah! Was that a joke?
That would mean that generating a high transmit power is easy? Why are 
then several stations running a Yuma TX (50W) into a poor antenna or 
modifying a IC-735 to get a few watts RF power on MF? If someone has a 
very limited antenna size and wants to run a solid signal anyway, why 
are there not many many more kW transmitters on air? Obviously it seems 
to be a problem for some to put a few MOSFETs together, with a suitable 
driver and low pass filter. A kW PA for LF/MF can be built for about 50 
EUR but people prefer to _buy_ a ready to use transmitter. And thus, i 
have to conclude that it is not easy to put out a high PEP, not only 
PEP/ERP, at least for many stations.

Bob shows what is possible on TA work on MF, allowing several stations 
here to get good decodes from him. With a 50W TX, as the PA, not the 
PA-driver, you would probably struggle to get a WSPR decode. Same for LF 
of course.

Everything is easy if you know how to do. Same for the ERP. Just use a 
kite... But...

73, Stefan/DK7FC


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Hi Bob, Wolf, LF,<br>
<br>
Am 15.02.2014 20:46, schrieb wolf_dl4yhf:
<blockquote cite="mid:52FFC3FD.2040601@freenet.de" type="cite">
  <meta content="text/html; charset=ISO-8859-1"
 http-equiv="Content-Type">
  <div class="moz-cite-prefix">Hello Bob and all,<br>
  </div>
  <blockquote cite="mid:BLU180-W7288D17496E83683CA9275AC9F0@phx.gbl"
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    <style><!--
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It's much easier to put a&nbsp;good sigs out on&nbsp;472 than 137 or
73.&nbsp;&nbsp;Countless new modes to use and band conditions much more
predictable on 600 meters. <br>
    </div>
  </blockquote>
  <br>
I agree as far as PEP-versus-ERP is concerned.<br>
</blockquote>
<br>
Hah! Was that a joke? <br>
That would mean that generating a high transmit power is easy? Why are
then several stations running a Yuma TX (50W) into a poor antenna or
modifying a IC-735 to get a few watts RF power on MF? If someone has a
very limited antenna size and wants to run a solid signal anyway, why
are there not many many more kW transmitters on air? Obviously it seems
to be a problem for some to put a few MOSFETs together, with a suitable
driver and low pass filter. A kW PA for LF/MF can be built for about 50
EUR but people prefer to <u>buy</u> a ready to use transmitter. And
thus, i have to conclude that it is not easy to put out a high PEP, not
only PEP/ERP, at least for many stations.<br>
<br>
Bob shows what is possible on TA work on MF, allowing several stations
here to get good decodes from him. With a 50W TX, as the PA, not the
PA-driver, you would probably struggle to get a WSPR decode. Same for
LF of course.<br>
<br>
Everything is easy if you know how to do. Same for the ERP. Just use a
kite... But...<br>
<br>
73, Stefan/DK7FC<br>
<br>
<br>
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