<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">40 years ago, I made one, using a 24 volt secondary transformer and a 50 ohm wirewound variable resistor. I mounted both in a metal project box, with rubber grommets in the entry/exit holes. I haven't seen the need to upgrade to more modern items. Works great.<div><br class="webkit-block-placeholder"></div><div>Ron Van Putte</div><div><br><div><div>On Dec 26, 2007, at 10:17 AM, Ed Alt wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"> <div class="Section1"><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy">I just dug out my set up. I used a Stancor P-8554 transformer. The secondary winding is rated at 30 VCT 1.7A. You could use something close to that, around 24 to 36V would probably work, it will just mean that the dimmer switch position will be different depending on the characteristics of the transformer. You might want something around 2.5A rating, just for extra margin to keep it loafing along instead of straining it.</span></font></p><div><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy"> </span></font><br class="khtml-block-placeholder"></div><p class="MsoNormal"><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy">Ed</span></font></p><div><font size="2" color="navy" face="Arial"><span style="font-size: 10.0pt;font-family:Arial;color:navy"> </span></font><br class="khtml-block-placeholder"></div><p class="MsoNormal" style="margin-left:.5in"><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:Tahoma">-----Original Message-----<br> <b><span style="font-weight:bold">From:</span></b> nsrca-discussion-bounces@lists.nsrca.org [<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org">mailto:nsrca-discussion-bounces@lists.nsrca.org</a>] <b><span style="font-weight: bold">On Behalf Of </span></b>Ed Alt<br> <b><span style="font-weight:bold">Sent:</span></b> Wednesday, December 26, 2007 11:10 AM<br> <b><span style="font-weight:bold">To:</span></b> 'NSRCA Mailing List'<br> <b><span style="font-weight:bold">Subject:</span></b> Re: [NSRCA-discussion] Foam Wing Cutting</span></font></p><div style="margin-left: 0.5in; "><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font><br class="khtml-block-placeholder"></div><p class="MsoNormal" style="margin-left:.5in"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy">You can use a light dimmer switch in series with a step down transformer. Connect the cutter wire to the secondary and you have a variable temp cutter that doesn’t have a shock hazard, assuming you properly insulate all the wiring from the AC cord, dimmer and transformer primary.</span></font></p><div style="margin-left: 0.5in; "><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy"> </span></font><br class="khtml-block-placeholder"></div><p class="MsoNormal" style="margin-left:.5in"><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy">Ed</span></font></p><div style="margin-left: 0.5in; "><font size="2" color="navy" face="Arial"><span style="font-size:10.0pt;font-family:Arial;color:navy"> </span></font><br class="khtml-block-placeholder"></div><p class="MsoNormal" style="margin-left:1.0in"><font size="2" face="Tahoma"><span style="font-size:10.0pt;font-family:Tahoma">-----Original Message-----<br> <b><span style="font-weight:bold">From:</span></b> nsrca-discussion-bounces@lists.nsrca.org [<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org">mailto:nsrca-discussion-bounces@lists.nsrca.org</a>] <b><span style="font-weight: bold">On Behalf Of </span></b>Earl Haury<br> <b><span style="font-weight:bold">Sent:</span></b> Wednesday, December 26, 2007 10:44 AM<br> <b><span style="font-weight:bold">To:</span></b> NSRCA Mailing List<br> <b><span style="font-weight:bold">Subject:</span></b> Re: [NSRCA-discussion] Foam Wing Cutting</span></font></p><div style="margin-left: 1in; "><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font><br class="khtml-block-placeholder"></div> <div><p class="MsoNormal" style="margin-left:1.0in"><font size="3" face="Arial"><span style="font-size:12.0pt;font-family:Arial">I built one of these for my son several years ago (wish I'd built 2) and it's gotten a lot of use with no problems at all. The only issue now is that Radio Shack may no longer carry the parts - places like Mauser Electronic will have them though.</span></font></p> </div> <div><div style="margin-left: 1in; "><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> <div><p class="MsoNormal" style="margin-left:1.0in"><font size="3" face="Arial"><span style="font-size:12.0pt;font-family:Arial">Earl</span></font></p> </div> <blockquote style="border:none;border-left:solid black 1.5pt;padding:0in 0in 0in 4.0pt; margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt"> <div><p class="MsoNormal" style="margin-left:1.0in"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">----- Original Message ----- </span></font></p> </div> <div style="font-color:black"><p class="MsoNormal" style="margin-left:1.0in;background:#E4E4E4"><b><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;font-weight: bold">From:</span></font></b><font size="2" face="Arial"><span style="font-size: 10.0pt;font-family:Arial"> <a href="mailto:planedoc@ptd.net" title="planedoc@ptd.net">jimmy graver</a> </span></font></p> </div> <div><p class="MsoNormal" style="margin-left:1.0in"><b><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;font-weight:bold">To:</span></font></b><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial"> <a href="mailto:nsrca-discussion@lists.nsrca.org" title="nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a> </span></font></p> </div> <div><p class="MsoNormal" style="margin-left:1.0in"><b><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;font-weight:bold">Sent:</span></font></b><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial"> Wednesday, December 26, 2007 9:34 AM</span></font></p> </div> <div><p class="MsoNormal" style="margin-left:1.0in"><b><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial;font-weight:bold">Subject:</span></font></b><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial"> [NSRCA-discussion] Foam Wing Cutting</span></font></p> </div> <div><div style="margin-left: 1in; "><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> </span></font><br class="khtml-block-placeholder"></div> </div> <div><p class="MsoNormal" style="margin-left:1.0in"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">I was wondering if I could get a little input. On the NSRCA web site there is a foam wing cutter controller and I was thinking of</span></font></p> </div> <div><p class="MsoNormal" style="margin-left:1.0in"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">building it to try my hand at cutting my own wings. I never did this yet, always built balsa frame up. It will open up quite a few new</span></font></p> </div> <div><p class="MsoNormal" style="margin-left:1.0in"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">designs for me. I was thinking of building a Boxer but I have to be able to cut foam. So any help would be appreciated. Did any </span></font></p> </div> <div><p class="MsoNormal" style="margin-left:1.0in"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">of the people on the list build and use one? If so how did it work? Any other controllers better? You can either put your reply</span></font></p> </div> <div><p class="MsoNormal" style="margin-left:1.0in"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">on the list if you think there is an interest or send me a private email. Thanks for you help Jimmy.</span></font></p> </div> <div><p class="MsoNormal" style="margin-left:1.0in"><font size="2" face="Arial"><span style="font-size:10.0pt;font-family:Arial">email: <a href="mailto:planedoc@ptd.net">planedoc@ptd.net</a></span></font></p> </div> <div style="margin-left:.5in"> <div class="MsoNormal" align="center" style="margin-left:.5in;text-align:center"><font size="3" face="Times New Roman"><span style="font-size:12.0pt"> <hr size="2" width="100%" align="center"> </span></font></div> </div><p class="MsoNormal" style="margin-left:1.0in"><font size="3" face="Times New Roman"><span style="font-size:12.0pt">_______________________________________________<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">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></span></font></p> </blockquote> </div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">_______________________________________________</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">NSRCA-discussion mailing list</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</a></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><a href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</a></div> </blockquote></div><br></div></body></html>