<div dir="ltr">Hopefully we hear some hints from software side too, for augmenting that noise, as this coupling to the chain during the modulation phase possibly.<div><br></div><div>The problem with hand made parts, that this inexpensive module use commerce mass production capable parts so not fitting the actual BOM.</div><div><br></div><div>73,</div><div>HA7DCD</div><div>Zoltan</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Sep 5, 2016 at 8:55 PM, Tom McDermott <span dir="ltr"><<a href="mailto:tom.n5eg@gmail.com" target="_blank">tom.n5eg@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div>Hi Ron, thanks for the pointer.<br><br>For use at 14 MHz, winding the two transformer windings on opposite sides of the ferrite core<br></div>could be an issue. That causes a lot of leakage inductance, and at 14 Mhz, depending on load<br>Z may attenuate the desired signal. 30 turns might be a bit much at 20 meters<br><br>Forming a bifilar twisted pair of the two windings reduces the leakage inductance a lot.<br></div></div><div><br></div>Minimizing the interwinding capacitance would not seem to be much of a consideration<br>at 60 or 120 Hertz.<br></div><br></div>-- Tom, N5EG<br><br><br><div><div><br></div></div></div>
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