<html><body>Gerd,<br>In the App note there is also complete artwork of the board layout with a 1" scale mark at the bottom..<br>Just one additional step to translate from the drawing to Metric...<br>Just in case you hadn't gotten that far...<br><br>Have Fun<br><br>Peter<br>N7BMG<br><br>
<blockquote webmail="1" style="border-left: 2px solid blue; margin-left: 8px; padding-left: 8px;">
-------- Original Message --------<br>
Subject: Re: [hpsdr] Transformers from Communication Concepts<br>
From: "Gerd Loch" <g.loch@nt-electronics.de><br>
Date: Thu, February 14, 2008 8:11 am<br>
To: "'Peter'" <Peter@GEHughes.us><br>
Cc: hpsdr@lists.hpsdr.org<br>
<br>
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<hr><title>Nachricht</title> <div><span class="421290513-14022008"><font color="#0000ff" face="Arial" size="2">Peter,</font></span></div> <div><span class="421290513-14022008"><font color="#0000ff" face="Arial" size="2"></font></span> </div> <div><span class="421290513-14022008"><font color="#0000ff" face="Arial" size="2">thanks for the additional information. Up to now I only found references to Communication Concepts.</font></span></div> <div><span class="421290513-14022008"><font color="#0000ff" face="Arial" size="2">You are right that the transformers are cheap and I do not intend to build the transfomers myself. </font></span></div> <div><span class="421290513-14022008"><font color="#0000ff" face="Arial" size="2">But nevertheless I need complete mechanical data for the layout of pcbs where they are used as I have not yet samples on my desk to measure.</font></span></div> <div><span class="421290513-14022008"><font color="#0000ff" face="Arial" size="2"></font></span> </div> <div><span class="421290513-14022008"><font color="#0000ff" face="Arial" size="2">73, Gerd</font></span></div> <div><span class="421290513-14022008"><font color="#0000ff" face="Arial" size="2">DJ8AY</font></span></div> <div><span class="421290513-14022008"><font color="#0000ff" face="Arial" size="2"></font></span> </div> <blockquote dir="ltr" style="margin-right: 0px;"> <div></div> <div class="OutlookMessageHeader" dir="ltr" align="left" lang="de"><font face="Tahoma" size="2">-----Original Message-----<br><b>From:</b> Peter [<a href="mailto:Peter@GEHughes.us]">mailto:Peter@GEHughes.us]</a> <br><b>Sent:</b> Thursday, February 14, 2008 1:35 PM<br><b>To:</b> g.loch@nt-electronics.de<br><b>Cc:</b> hpsdr@lists.hpsdr.org<br><b>Subject:</b> RE: [hpsdr] Transformers from Communication Concepts<br><br></font></div>Gerd<br>I think they went into businesss to simply make all of the Motorola APP notes a reality... and have been doing so since the mid 80's<br>If you notice their amps are exact duplicates of the ones described in the App notes... They are even mentioned as a source of kits in the App notes.. along with references to RF Concepts..Which supplied the original Transformers<br>The Original APP Notes were created at Motorola in Phoenix, Az by Helge Granberg who was also an ARRL Technical Advisor ...RFConcepts is in Peoria, AZ.. and Communication Concepts, in <font face="Trebuchet MS, Arial, Helvetica">Beavercreek, Oh</font>, is quite close to Dayton.. Lots of Hams there.... and in Az...<br><br>Just one big happy family...<br>For the very low cost of the transformers ($US~6.00) are you sure you want to waste you time trying to build and tune one? I think it would cost more to simply try and procure all of the parts you need..<br><br>Peter<br>N7BMG<br><br> <blockquote style="border-left: 2px solid blue; padding-left: 8px; margin-left: 8px;" webmail="1">-------- Original Message --------<br>Subject: RE: [hpsdr] Transformers from Communication Concepts<br>From: "Gerd Loch" <g.loch@nt-electronics.de><br>Date: Thu, February 14, 2008 7:09 am<br>To: "'Peter'" <Peter@GEHughes.us><br>Cc: <hpsdr@lists.hpsdr.org><br><br> <div><span class="417260612-14022008"><font color="#0000ff" face="Arial" size="2">Peter,</font></span></div> <div><span class="417260612-14022008"><font color="#0000ff" face="Arial" size="2"></font></span> </div> <div><span class="417260612-14022008"><font color="#0000ff" face="Arial" size="2">thanks for yor link. That helps of course.</font></span></div> <div><span class="417260612-14022008"><font color="#0000ff" face="Arial" size="2">What is then the business of Communication Concepts?</font></span></div> <div><span class="417260612-14022008"><font color="#0000ff" face="Arial" size="2"></font></span> </div> <div><span class="417260612-14022008"><font color="#0000ff" face="Arial" size="2">73, Gerd</font></span></div> <div><span class="417260612-14022008"><font color="#0000ff" face="Arial" size="2">DJ8AY</font></span></div> <blockquote dir="ltr" style="margin-right: 0px;"> <div></div> <div class="OutlookMessageHeader" dir="ltr" align="left" lang="de"><font face="Tahoma " size="2">-----Original Message-----<br><b>From:</b> Peter [<a href="mailto:Peter@GEHughes.us%5D" target="_blank" _onclick="Popup.composeWindow('pcompose.php?sendto=Peter%40GEHughes.us%5D');; return false;">mailto:Peter@GEHughes.us]</a> <br><b>Sent:</b> Thursday, February 14, 2008 12:45 PM<br><b>To:</b> g.loch@nt-electronics.de<br><b>Cc:</b> hpsdr@lists.hpsdr.org<br><b>Subject:</b> RE: [hpsdr] Transformers from Communication Concepts<br><br></font></div>Gerd<br>Try:<br><a href="http://www.rfpowersystems.com/prod02.htm" target="_blank">http://www.rfpowersystems.com/prod02.htm</a><br><br>This the place which actually makes the Transformers used by Communications Concepts..<br>They have dimensions listed for their current line which should help you as far as just straight mechanical .<br>Also look at Application note AR347 on Communications Concepts for a write up on the amp.<br><br>Peter Hughes<br>N7BMG<br><br> <blockquote style="border-left: 2px solid blue; padding-left: 8px; margin-left: 8px;" webmail="1"> </blockquote></blockquote></blockquote></blockquote> <hr>_______________________________________________<br>
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