### Author Topic: New VIC pictures discussion!!!  (Read 49563 times)

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##### Re: New VIC pictures discussion!!!
« Reply #64 on: February 14, 2009, 01:01:13 am »
thanks i will go over everything!

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##### Re: New VIC pictures discussion!!!
« Reply #65 on: February 14, 2009, 04:04:24 am »
so back from dinner i just thought to myself if we are calculating the inductance for each bobbin separately then why does stan's equation call for the mean radius?

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##### Re: New VIC pictures discussion!!!
« Reply #66 on: February 14, 2009, 22:45:52 pm »
mean radius is a measurment  from the center line to the middle of the depth of your coil.. all measurments are shown in figure 7-10.          i have done some reseach on what A B and C variable would be for john bostics demensions of bobbin.. these calculation are for the cavities to be wound completely full. and is only acounting for 1 cavity out of 14 for each seperate coils.
PRIMARY  .030 ga
A= .875
B= 2.399
C= .0625
N=312 max

SECONDARY .002 ga.
A= 1.875
B= .0625
C= .375
N= 5,797 max

RESONANT SS CHARGING CHOKES  .004 GA
A= .71875
B= .1875
C= .0625
N= 690 max

max N was achieved by for example resonant choke bobbin cavity is .1875 x .0625 .. the wire is .004 so  1.875 / .004= 15 and .0626 / .004= 46..   so the .004 will stack 15 wide and 46 high if enamel doesnt add diameter to the wire.. if so you need to know its tru dia to know wind capacity.. also important is that changing wind count  changes C and A..      B will remain constant.  hope this helps. please inform me if you see other wise?

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##### Re: New VIC pictures discussion!!!
« Reply #67 on: February 15, 2009, 01:28:28 am »
yeah i also pondered that it could mean that the Mean average of radius would be to the center of the depth of the winding......but then we are not really sure of this until it is actually wound......i swear the easiest thing to do would be to wind the coil use an inductance meter for both bobbins......and work your math off those readings......i always use my tools since i have come across so many unknown variables......this is why i have stayed away form the multicoil VIC configuration....it is way over my head in calculating.....im a trial and error / mathematic planning type of person.....i can't brute force these so what i say is that we just wind the damn thing with the proper amount of resistance and wind the secondary and primary to give us our desired ratio.....and use and inductance meter.......i have one and i am willing to mail it out as "loan"....if anyone needs to use it when we get to that point in time......

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##### Re: New VIC pictures discussion!!!
« Reply #68 on: February 15, 2009, 02:27:32 am »
This portion of the project is not my strong point, so I'm not diving into the discussion just yet.

But I do have some thoughts.

Ever hear the age old "Is the glass half empty? or half full?" ... well the Engineer says "It's twice as big as it needs to be!"

So... Stan designed these bobbins, and he's a smart guy, so why would he make it bigger than it needs to be?

"You have to learn to ask the right questions"

So what happens if we ask the question "What happens when you wind the bobbins completely full" ...

Maybe the answer is simple, and you already know, or maybe it's something that was overlooked or undiscovered. But I can't help but think that if Stan designed this thing with a certain capacity then he must have experiemented with the max capacity. Otherwise he would have did the math first, then designed the bobbins exactly to size.

Maybe he did do the math first and then designed it to it's proper size and thats what we are looking at... KISS...

KISS is telling me it is this size for a reason, so I wonder, and ask, what does the math spit out when you completely FILL these bobbins with wire?

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##### Re: New VIC pictures discussion!!!
« Reply #69 on: February 15, 2009, 03:42:19 am »
This drawing shows the mean radius for the coils.  These bobbins will not be wound completely full.  This is for a 10-1 ratio.  Dynodon scaled the bobbins from the pitcures.  This has got to be very close but it's not exact.  I hope this will be helpful.

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##### Re: New VIC pictures discussion!!!
« Reply #70 on: February 15, 2009, 04:05:23 am »
11.6 k is around 580 ft of dankies wire..
580 /14 = 41.42 ft in each cavity
times 2 since theres 2 wires.
so 82.84 feet in each cavity..
having a mean diameter of   1.437"  x 3.14= 4.51 circumference..
82.84 ft x 12= 994.08 inches
994.08 inches /  4.51 circumference= 220.41 winds per cavity.
knowing that you would need to be able to measure the coils demesions to find A and C if you know the depth and dementsions of your cavity C and A should be easy to find with one persicion measurement which would be the gap/void depth of bobbin cavity.
N will be the 220 winds
B is .0625

this is just a example all coils use the same method. i think secondary can be filled to the rim stans said the more winding the more voltage.. he never discouraged to much. now the stainless he says 11.6k so that will tell you the length for the stainless.  the primary will only hold 212 max for .030 ga. i say load it down and the seconday.. but hold to the 11.6k

outlawstc