[TCML] Multilayered Secondary Coils

[Jeff Behary <electrotherapy@xxxxxxxxxxx>]

Hey all,
 
I've made a few flat coils over the years (some of the first were in September, 1999), but I think these are my first "real" Pancake Coils.  
I've documented the entire creation of one of them:
 
http://www.electrotherapymuseum.com/2008/29June2008/index.htm
http://www.electrotherapymuseum.com/2008/29June2008/index_2.htm
 
and have made a second one last night:
http://www.electrotherapymuseum.com/2008/KinraideCoilII/index.htm
 
They are about the closest thing to what Tesla and others were doing in the 1890s.  Many turns of wire, meticulously insulated, embedded in a wax compound, with a ribbon primary coil.  A lot of effort on the part of several people - Frank, who acquired the impossible - a source for silk-covered wire, a man who was patient enough to rebuild his machine in order to cover the cover the wire multiple times.  This is normal 30 AWG magnet wire, covered with silk until it was .040" thick.  (Getting the silk was an ordeal in itself, it took *hundreds* of spools, all had to be imported).  Others may not agree, but I still feel that this wire can be insulated to a better degree than other wires for this specific configuration.  The coils are wound with a lot of tension, and the insulation still flows easily between the turns.  
 
I've done some initial tests with both coils individually, and plan to also test both in series.
With .1 mfd, around 1000 volts, power limited to less than 100 watts, each coil can produce a 6" spark.
 
Whether there are many thin  sparks surrounded by blue effluves or a single thick slow crackle depends on the spark gap.  The large 6"
diameter gap in the last post makes the former discharge, a 1.25" diameter tungsten gap opened to point where it nearly doesn't operate produces the second discharge.  
 
At around 200 watts, I could get a hot flaming discharge 6-8" long.  Photos to come, this time I tried to document the construction of things first.
Jeff Behary
_________________________________________________________________
Keep your kids safer online with Windows Live Family Safety.
http://www.windowslive.com/family_safety/overview.html?ocid=TXT_TAGLM_WL_family_safety_072008_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla