<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><font class="Apple-style-span" face="Courier" size="4"><span class="Apple-style-span" style="font-size: 14px;">I wrote: "If a sufficient voltage V1 is difficult to obtain, it is still possible to drive a FET bridge B1 (and diode D1 if necessary) using plate position sensing or potential sensing circuitry to drive the gates provided the energy required is not excessive." </span></font></div><div><font class="Apple-style-span" face="Courier" size="4"><span class="Apple-style-span" style="font-size: 14px;"><br></span></font></div><div><font class="Apple-style-span" face="Courier" size="4"><span class="Apple-style-span" style="font-size: 14px;">That should say: "If a sufficient voltage V1 is difficult to obtain, it is still possible to drive a FET bridge B1 (and/or a FET replacement for diode D1 if necessary) using plate position sensing or potential sensing circuitry to drive the gates provided the energy required is not excessive." </span></font></div><div><font class="Apple-style-span" face="Courier" size="4"><span class="Apple-style-span" style="font-size: 14px;"> </span></font></div><div> <font class="Apple-style-span" face="Courier" size="4"><span class="Apple-style-span" style="font-size: 14px;">Best regards,<br class="Apple-interchange-newline"></span></font><div><font class="Apple-style-span" face="Courier" size="4"><span class="Apple-style-span" style="font-size: 14px;"><br class="khtml-block-placeholder"></span></font></div><div><font class="Apple-style-span" face="Courier" size="4"><span class="Apple-style-span" style="font-size: 14px;">Horace Heffner</span></font></div><div><font class="Apple-style-span" face="Courier" size="4"><span class="Apple-style-span" style="font-size: 14px;"><a href="http://www.mtaonline.net/~hheffner/">http://www.mtaonline.net/~hheffner/</a></span></font></div><div><font class="Apple-style-span" face="Courier" size="4"><span class="Apple-style-span" style="font-size: 14px;"><br class="khtml-block-placeholder"></span></font></div><font class="Apple-style-span" face="Courier" size="4"><span class="Apple-style-span" style="font-size: 14px;"><br class="Apple-interchange-newline"><br class="Apple-interchange-newline"></span></font> </div><br></body></html>