Re: Designing Primary Coil - Which resonant frequency??

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>

Dan:  Trying to design a secondary to match a primary is a tough job few of
us would try. We just wind a secondary and tune the primary to fit. Computer
analysis can provide a guide before you start, but your real coil will
always be a bit differant , except by lucky accident. The primary is wound
with more than enough turns and tuned by moving your tap to get the right
point. No two capacitors are the same, so no two coils will be tapped at the
same point. In addition most coilers use home built  capacitors or
assemblies that differ each time they are assembled so they are inconsistant
at best.
  Robert  H

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Sat, 06 Jul 2002 22:12:39 -0600
> To: tesla-at-pupman-dot-com
> Subject: Designing Primary Coil - Which resonant frequency??
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Sat, 6 Jul 2002 22:18:41 -0600
> 
> Original poster: "Daniel McCauley by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <dhmccauley-at-spacecatlighting-dot-com>
> 
> Another quick question regarding the design of the Primary Coil.
> 
> I've chosen my power supply and am using a 15kV, 60mA NST with calculated
> output impedance of 250k ohms.
>> From this my tank cap should be 0.0106uF.
> 
> My question is from everyone's experience, how should i go about designing
> my primary coil?  Do i choose some arbitrary resonant frequency say between
> 100-200kHz from the tank circuit and then design the secondary coil to match
> it or is there some "magic" resonant frequency i should try to meet.
> 
> Thanks again for the help!!!
> 
> BTW, my second-gen SSTC passed the first test with 360VAC input and the
> results are spectacular.  Maybe tomorrow we'll move up to 480VAC,
> half-rectified and see what happens.  See if those 1000V FETs can take
> it!!!!
> 
> Dan
> 
> 
> 
> 
> 
>