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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Hi,<o:p></o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Excellent news. Best news since Apache took over and the HPSDR boards became much less affordable than those manufactured by TAPR. Understandably so since they have been sold non-profit as fits open project. I hope the new Hermes 2M will stay that way.<o:p></o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>I'd like to be added to the list of interested.<o:p></o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Some thoughts I'd like to share.<o:p></o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Concerning the 2m band. I am with those who say that it's preferable to have a 300Msps ADC. And thinking about a new ADC it would be great to have it dual channel allowing diversity and pure signal stuff.<o:p></o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>I looked into what's available to replace the currently used LTC2208 priced at about $90:<o:p></o:p></span></p><p class=MsoPlainText style='margin-left:36.0pt;text-align:left;text-indent:-18.0pt;mso-list:l1 level1 lfo2;direction:ltr;unicode-bidi:embed'><![if !supportLists]><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span dir=LTR></span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>If decided to stay with 16 bit resolution, then this looks reasonable:<o:p></o:p></span></p><p class=MsoPlainText style='margin-left:36.0pt;text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>AD9652 - 16-bit, Dual, 310Msps, 87dBFS SFDR – priced at about $300<o:p></o:p></span></p><p class=MsoPlainText style='margin-left:36.0pt;text-align:left;text-indent:-18.0pt;mso-list:l1 level1 lfo2;direction:ltr;unicode-bidi:embed'><![if !supportLists]><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span dir=LTR></span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>However, if 14 bit resolution seems to be sufficient this A/D looks as a good candidate:<o:p></o:p></span></p><p class=MsoPlainText style='margin-left:36.0pt;text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>LTC2158-14 – 14-bit, Dual, 310Msps, 88dBFS SFDR – priced at about $200<o:p></o:p></span></p><p class=MsoPlainText style='margin-left:36.0pt;text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoPlainText style='margin-left:36.0pt;text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>These are of course more expensive that the LT2208 currently used (which is 1 channel 250Msps) priced at about $90.<o:p></o:p></span></p><p class=MsoPlainText style='margin-left:36.0pt;text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Accordingly D/A should also be dual and with the with the matching update rate. Possibly one of these alternatives:<o:p></o:p></span></p><p class=MsoPlainText style='margin-left:36.0pt;text-align:left;text-indent:-18.0pt;mso-list:l0 level1 lfo4;direction:ltr;unicode-bidi:embed'><![if !supportLists]><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span dir=LTR></span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>AD9781 - 14-bit, Dual, 600Msps, Parallel/LVDS, 78dB SFDR, 0.44W Power – priced at about $21<o:p></o:p></span></p><p class=MsoPlainText style='margin-left:36.0pt;text-align:left;text-indent:-18.0pt;mso-list:l0 level1 lfo4;direction:ltr;unicode-bidi:embed'><![if !supportLists]><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span></span><![endif]><span dir=LTR></span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>AD9787 – 14-bit, Dual, 800Msps, Parallel, 82dB SFDR, 1.05W Power – priced at about $27<o:p></o:p></span></p><p class=MsoPlainText style='margin-left:36.0pt;text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoPlainText style='margin-left:36.0pt;text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Compared to $18 for currently used AD9744.<o:p></o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Kjell, hope this helps in your very welcome and blessed efforts.<o:p></o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'><o:p> </o:p></span></p><p class=MsoPlainText style='text-align:left;direction:ltr;unicode-bidi:embed'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>73 Isaac 4Z1AO<o:p></o:p></span></p><p class=MsoPlainText dir=RTL><span dir=LTR><o:p> </o:p></span></p></div></body></html>