I assume that you mean a Surgistor(TM). You'll find them for very high prices on eBay (the one currently listed is $25!). Google shows several places that claim to have them.
> -----Original Message----- > From: Gene Heskett [mailto:[email protected]] > Sent: Sunday, December 06, 2015 10:26 PM > To: Enhanced Machine Controller (EMC) > Subject: [Emc-users] Poor mans soft turnon > > Greetings all; > > Before tv's lost their crt's, there was a component in the power inlet circuit > that had a very high negative temp coefficient, which was used to create a > high voltage drop when it was cold, which in turn forced the first few seconds > of its power draw after being turned on, thru the degaussing coils wrapped > around the crt in order to demagnetise it. > > That voltage drop heated it, and it got hot enough to get down to just a couple > of ohms, which was not enough to overcome the MOV in series with the coils. > This also allowed the tv itself to be soft-started, and it worked so well that it > was often the major part failure in the tv for the first 3 or 4 years. > > About 3 or 4 of those, wired in parallel, would also serve as an inrush limiter > when I turn on the power supply for my G0704 mill. But the parts houses we > had locally have all evaporated. I just checked a couple surplus places without > finding any of those critters. > > Does anyone have a suggestion as to where a small handfull of these could be > sourced? Usually bare, they look like a graphite quarter coin with a lead wire > soldered to the middle of a silver plated dot in the middle of each face. > Usually slightly thicker than a 'merican quarter. > > When I was setting up the mill, and building that supply, I had wired up a 4 > plex on the wall behind it, putting it by itself on a 20 amp breaker. Turning it > on, trips the 20 instantly as the motor supply has a huge amount of > microfarads, probably in excess of 80,000 uf, mainly because that was the size > of the caps I could source, NOS, locally by the fine old art of horse trading. > > So, while it draws less than 3 amps with the spindle motor off, and could reach > 18 if the motor was in a LR state, but it takes a 30 amp breaker to withstand > the in-rush. If I could find some of these critters, building them into that motor > supply, I could put the 20 amp breaker back in and it wouldn't be quite so ill > eagle if an inspector looked it over. > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > Genes Web page <http://geneslinuxbox.net:6309/gene> > > ---------------------------------------------------------------------------- -- > Go from Idea to Many App Stores Faster with Intel(R) XDK Give your users > amazing mobile app experiences with Intel(R) XDK. > Use one codebase in this all-in-one HTML5 development environment. > Design, debug & build mobile apps & 2D/3D high-impact games for multiple > OSs. > http://pubads.g.doubleclick.net/gampad/clk?id=254741911&iu=/4140 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Go from Idea to Many App Stores Faster with Intel(R) XDK Give your users amazing mobile app experiences with Intel(R) XDK. Use one codebase in this all-in-one HTML5 development environment. Design, debug & build mobile apps & 2D/3D high-impact games for multiple OSs. http://pubads.g.doubleclick.net/gampad/clk?id=254741911&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
