*To*: Tesla Coil Mailing List <tesla@xxxxxxxxxx>*Subject*: Re: [TCML] was RE: How I modified the 3 phase for dual wye 5KV 2xI; ** Now charging inductors.*From*: Bert Hickman <bert@xxxxxxxxxxxxxxxxxxxxx>*Date*: Tue, 19 Aug 2014 10:35:55 -0500*Delivered-to*: teslaarchive@xxxxxxxxxx*Delivered-to*: tesla@xxxxxxxxxx*In-reply-to*: <B8B8DFC6EBE74A4E8AE75A9D7D6F713B@JimonVista32>*List-archive*: <http://www.pupman.com/pipermail/tesla/>*List-help*: <mailto:tesla-request@pupman.com?subject=help>*List-id*: Tesla Coil Mailing List <tesla.pupman.com>*List-post*: <mailto:tesla@pupman.com>*List-subscribe*: <http://www.pupman.com/mailman/listinfo/tesla>, <mailto:tesla-request@pupman.com?subject=subscribe>*List-unsubscribe*: <http://www.pupman.com/mailman/options/tesla>, <mailto:tesla-request@pupman.com?subject=unsubscribe>*Organization*: Stoneridge Engineering, LLC*References*: <54035D07869741C69E19EA89F28CBB5B@JimonVista32> <53F2517C.4080600@capturedlightning.com> <B8B8DFC6EBE74A4E8AE75A9D7D6F713B@JimonVista32>*Reply-to*: Tesla Coil Mailing List <tesla@xxxxxxxxxx>*Sender*: "Tesla" <tesla-bounces@xxxxxxxxxx>*User-agent*: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0 SeaMonkey/2.26.1

Hi Jim and all, Jim Mora wrote:

Hi Bert, et al, My newest gap is driven by a DC motor and has 8 equal spaced .5" tungsten electrodes (one of several works in progress). The motor is very rugged but will top out at 426 breaks calculated at full voltage rating DC (PWM).

I have an aircore choke that I use with my pig. It is thin wall 4" pvc wound 12 inches with milspec Teflon insulated 1000v silver coated 19 strand copper held in place with a thin coat of epoxy. This was a recommendation from DC Cox and he had one on top the Big Bruiser controller if I remember correctly feeding out the "Big Red" HV line to the big gap and tank. I seem to remember it was 100 turns. I also have a stash of HV ceramic puck caps that screw together to send some hash to ground. ** The charging inductor has always been the fly in the ointment on this project ;-^) Terry Fritz sold me a 20KV utility pole transient protector but it may it may fire all the time though I think it is intended to handle lightning transients. But I haven't looked at it in some time and never tested it. I have six identical MOT's and others but didn't want to go down that road. I will take the path of least resistance if it will be robust.

I did brake down that 10KVA dual C core transformer today, not easy! They are big cores and I found a company that makes multi-sectional Bobbins in selectable materials that fit it. I'll call their engineering department tomorrow to see what they say.

oooooooooooooo Layer N+1 |_____________ | oooooooooooooo Layer N

Let's review the 3H charge inductor and .1uf tank combination: Using Richie's standard F-res first equation formula and assuming a low loss inductor I get 291 hertz. How do you arrive at 600hz? Since I will have a lower break rate, is increasing the inductance slightly reasonable? This brings down the frequency of resonance even lower, yes?

Bert I really want to extend my appreciation for your help on this long side lined project. This Is turning out to be a "learning opportunity". Viva Lichtenberg discharges, shrunken quarters, and long streamers!

Jim Mora

Bert <snip> _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla

**References**:**[TCML] How I modified the 3 phase for dual wye 5KV 2xI***From:*Jim Mora

**Re: [TCML] How I modified the 3 phase for dual wye 5KV 2xI***From:*Bert Hickman

**[TCML] was RE: How I modified the 3 phase for dual wye 5KV 2xI; ** Now charging inductors.***From:*Jim Mora

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