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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The F3A adapter Scott mentioned pulls 2 cell voltage from the 5s adapter. That 2s voltage is then run to a (backup) voltage regulator. Backup Vreg meaning it is set at a lower voltage than the primary Vreg output, and would only supply current to the RX if the primary output dropped to below the backup voltage.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Switching regulators in parallel are not a good idea whether powered by a single battery, separate batteries, or “tapped” with an adapter from a motor battery.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The F3A adapter essentially allows a redundant power pathway (if a 2nd Vreg is used with it) without a 2<sup>nd</sup> RX battery.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dave Lockhart<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> nsrca-discussion-bounces@lists.nsrca.org [mailto:nsrca-discussion-bounces@lists.nsrca.org] <b>On Behalf Of </b>Peter Vogel<br><b>Sent:</b> Monday, January 23, 2012 5:50 PM<br><b>To:</b> General pattern discussion<br><b>Subject:</b> Re: [NSRCA-discussion] Main battery redundant lead for receiver<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>And, of course, with a non-switching BEC off a 10s or even a 5s pack you would have massive heat issues as it tries to step down the voltage from 18.5 volts to 7.2 or 6 volts, depending on whether you are running an HV or standard voltage setup, so the regulator would probably need a fan or heat sink of some sort, which likely negates any weight savings from not running with a second battery.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Peter+<o:p></o:p></p><div><p class=MsoNormal>On Mon, Jan 23, 2012 at 2:30 PM, Scott McHarg <<a href="mailto:scmcharg@gmail.com">scmcharg@gmail.com</a>> wrote:<o:p></o:p></p><p class=MsoNormal>You have to be careful using the BEC, especially from CC because it is a switching regulator which cannot be run in parallel. It's really best not to use the BEC and set up a truly separate system.<br><br>Scott<o:p></o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Mon, Jan 23, 2012 at 4:28 PM, George Kennie <<a href="mailto:geobet4evr@gmail.com" target="_blank">geobet4evr@gmail.com</a>> wrote:<o:p></o:p></p><div><p class=MsoNormal>Could a CC BEC also be used instead of a reg.? I don't know how much curent is passed by a reg. <o:p></o:p></p></div><div><p class=MsoNormal>Sounds good cause it's a bummer trying to solder an extra lead to the Deans.<o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>G.<o:p></o:p></p></div><div><div><div><p class=MsoNormal>On Mon, Jan 23, 2012 at 5:09 PM, Scott McHarg <<a href="mailto:scmcharg@gmail.com" target="_blank">scmcharg@gmail.com</a>> wrote:<o:p></o:p></p></div></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Guys,<br> Chris Moon just e-mailed me about some leads that were done at the factory. These leads run off your balance leads to a voltage regulator and allow your main battery pack to be utilized as a redundant receiver battery. It is NOT meant to be a primary but it will save 20+ grams if you're running 2 rx batteries. You still have to run the 2nd regulator for true redundancy but you eliminate the 2nd battery. These leads are factory made and eliminate the need to make them yourself with the concern about plugging in to the wrong cell. I know in my article, I was pretty much against doing this as a backup but, with Chris having this made at the factory, he has all but eliminated making a mistake by tying to the wrong cell. I have the link that I'll e-mail you off-list or you can just go to his website. I don't want to break the NSRCA list rules by advertising for him even though he advertises with the NSRCA. The leads are only $3.99 each and are found under the Connectors/Adapters listing.<br><br>Thank,<br>Scott<span style='color:#888888'><br clear=all><br>-- <br></span><b><span style='font-size:13.5pt;font-family:"Comic Sans MS";color:#3333FF'>Scott A. McHarg</span></b><span style='color:#888888'><br><br></span><o:p></o:p></p></div></div><p class=MsoNormal>_______________________________________________<br>NSRCA-discussion mailing list<br><a href="mailto:NSRCA-discussion@lists.nsrca.org" target="_blank">NSRCA-discussion@lists.nsrca.org</a><br><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target="_blank">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><o:p></o:p></p></blockquote></div><p class=MsoNormal><br><br>_______________________________________________<br>NSRCA-discussion mailing list<br><a href="mailto:NSRCA-discussion@lists.nsrca.org" target="_blank">NSRCA-discussion@lists.nsrca.org</a><br><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target="_blank">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><o:p></o:p></p></div><p class=MsoNormal><br><br clear=all><o:p></o:p></p></div></div><p class=MsoNormal><span class=hoenzb><span style='color:#888888'>-- </span></span><span style='color:#888888'><br></span><span class=hoenzb><b><span style='font-size:13.5pt;font-family:"Comic Sans MS";color:#3333FF'>Scott A. McHarg</span></b></span><span style='color:#888888'><br><br></span><br>_______________________________________________<br>NSRCA-discussion mailing list<br><a href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a><br><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" target="_blank">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a><o:p></o:p></p></div><p class=MsoNormal><br><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <o:p></o:p></p><div><p class=MsoNormal>Director, Fixed Wing Flight Training<o:p></o:p></p></div><div><p class=MsoNormal>Santa Clara County Model Aircraft Skypark<o:p></o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><img border=0 id="_x0000_i1025" src="http://farm8.staticflickr.com/7163/6513778381_5569cc985d_m.jpg"><o:p></o:p></p></div></div></body></html>