Re: Comments on my coil?

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

Original poster: "Dave Lewis by way of Terry Fritz <teslalist-at-qwest-dot-net>" <hvdave-at-earthlink-dot-net>

Thanks Josh,

Well its great to know you're getting 5 footers with that set up.  That
gives me some hope.  I would be really happy with that performance.

Adding another cap just might be what I need to suck the watts out of my
NST's.  The difference between the voltage on the primary (and
performance) with one NST or both in parrallel is not great.   I
measured the voltage with a HV probe into my scope with the coil
running.   That makes me agree with your comment.

The down side of the other caps is it will force me to use a fewer turn
primary, which are harder to tune IMO.  However, I've got a nice little
tuning coil that in series with the main primary coil which should make
it much easier.


I agree that the was #22 too big for my secondary.  If I wind up a new
secondary, I'm going to consider #24 down to #28.  I have a big spool
7lb of #26 right now so that hopefully that might work well.  If I did
double my pri cap, a new secondary with more inductance would be nice to
lower resonant frequency.

Thanks
Dave Lewis

Tesla list wrote:
 >
 > Original poster: "J Dow by way of Terry Fritz <teslalist-at-qwest-dot-net>" 
<jdowphotography-at-hotmail-dot-com>
 >
 > Well if you are using 2 15/60’s and getting 3-4 feet then there must be
 > room for improvement because I’m getting 5 footers with 2 12/60’s. The
 > first two things I can think of is your sec coil and your cap. I use twice
 > as much (0.0692mf) geek cap mmc.
 > Your secondary is short and the wire is fat. I thought that 22awg was going
 > to be the thing but I’ve found 24 awg can take it if you got a well made
 > sec coil.
 > My coil is 1700 turns on a 4” pvc form 36” tall. I covered the whole thing
 > with a full can of polyester reason. It has out preformed my old 10” 22awg
 > coil. That one died a miserable death (wound on a sona tube). My next coil
 > will be a 6” coil with 1700 turns 24 awg.
 > Coil winding and coating tip.  Microwave ovens are the best thing for the
 > home coiler!
 > All sorts of things can be got out of them. Like the rotisserie motor. A
 > strong little motor you can plug into the wall. And it turns your coil at
 > just the right speed to keep the coating of polyester resin from 
dripping off.
 >
 > I think your SRSG is fine. I use ¼ bolts they work well and are cheep and
 > melt less. I also run with 300mf pfc on my nst’s.
 > The rest looks good.
 >
 > Good luck
 > Read you later
 > Josh