<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Hi Dave,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>How do you define ‘high performance’ in that frequency range? For serious DXing or contesting you need high sensitivity AND high RX dynamic, much more than on the HF bands. There are only a few (expensive) designs that do not suffer from deficient LOs and overstrained mixers. Bad phase noise limits not only the RX dynamic, but also generates a bad TX spectrum.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Basically a well designed DDC/DUC approach could be the key architecture to overcome these issues in a economic way, but it’s certainly not a weekend project.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>73, Helmut, DC6NY<o:p></o:p></span></p><p class=MsoNormal><b><i><span style='font-size:11.0pt;font-family:"Arial","sans-serif"'><o:p> </o:p></span></i></b></p></div></body></html>