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</o:shapelayout></xml><![endif]--></head><body lang=FR-CA link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoPlainText>So starting with the mixer schematic Jesse kindly proposed<o:p></o:p></p><p class=MsoPlainText>What would you suggest as a final ‘transmitting’ load<br>for all 4 mixed frequencies ?<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Looking at what people suggested it looks like<br>a loop antenna with low Q (adjusted for 500Khz to 1700Khz) would do ?<br><br><o:p></o:p></p><p class=MsoPlainText>P.S. After the next replies I will close this discussion as it is (and always has been)<br>out of topics for Synth DIY.. Thanks for you guys who kindly offered your help !<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>*********************************************************************<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Yep, there's a vibrant analog video synth community these days using that same old tech from back when. Eurorack even.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>LM6172 is a nice little dual opamp with something like 80mhz bandwidth IIRC. Theyre easy to use because it's fine w +-12V rails. The DIP version just went end of life a few weeks ago, SOIC package is still being produced. Just mind the datasheet, it likes a 1k feedback resistor.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Here's a little summing mixer schematic maybe it'll be useful to you.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>2mhz is nbd, I wouldn't sweat it too much. We're a bunch of amateurs monkeying w 60-80mhz for vertical rate stuff and seems like most people's PCB's aren't laid out with any kind of understanding of signal integrity whatsoever and it all works just fine.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Uninterrupted ground planes are your pal <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>You could probably ask on LZX Community Forum if you run into snags, there's a handful of video DIYers there that kick schematics around and tend to be helpful. There's a discord as well <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Cheers,<o:p></o:p></p><p class=MsoPlainText>Jesse<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>_______________________________________________<o:p></o:p></p><p class=MsoPlainText>Synth-diy mailing list<o:p></o:p></p><p class=MsoPlainText>mailto:Synth-diy@synth-diy.org<o:p></o:p></p><p class=MsoPlainText>http://synth-diy.org/mailman/listinfo/synth-diy<o:p></o:p></p><p class=MsoPlainText>Selling or trading? Use mailto:marketplace@synth-diy.org<o:p></o:p></p></div></body></html>