Re: Propeller Gap (was ARSG/cap/gap help)

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

Original poster: "Jeremy Scott by way of Terry Fritz <teslalist-at-qwest-dot-net>" <supertux1-at-yahoo-dot-com>


Hi,

I built a similar gap, except that I used an
'oriental' 1800 RPM motor and only four
stationary electrodes on the corners. My base
is a 12" square of HDPE on top of an oak box.

I used 1/4" diameter tungsten carbide blanks
for the post electrodes, and I crammed three
1/8" diameter x 7" long tungsten rods into the
rotor block. I've seen designs that only use 1/8"
rods and thought that 1/4" throughout the
whole system would be better.

The phase is adjusted with John Freau's series
variac-capacitor control thingy :)

I will probably bring it to the Cheesehead Teslathon,
or I'll post pictures tonight if anyone is interested.


--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: "by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>"
 > <dhmccauley-at-spacecatlighting-dot-com>
 >
 > My portable demo coil uses almost the same
 > equipment.
 >
 > 1.5kVA 14.4kV Potential Transformer
 > ARSG Propellar Gap
 > 0.0257uF Capacitor
 >
 > The following link describes every detail of my
 > coil.  It currently runs at
 > about 3 to 3.5kW input power with 6-8 foot
 > streamers.
 > http://www.spacecatlighting-dot-com/teslacoil7.htm
 >
 > The next link below describes my ARSG propellar gap,
 > which is based on Terry
 > Blake's ARSG.
 > http://www.spacecatlighting-dot-com/teslacoil9.htm
 >
 > If you are using the 14.4kV, 1.5kVA PT, then the
 > 500ft roll of 12 AWG works
 > perfectly as a ballast and limits input power to
 > about 3 to 3.5kW which the
 > potential transformer
 > can easily do for short durations.  I run the
 > ballast for up to 15 minutes
 > at a time with no problems.  Although, I typically
 > allow everything to cool
 > a bit when running continous like
 > that at 3 to 3.5kW.
 >
 > As for capacitor size.  For this set-up, 0.01uF to
 > 0.03uF works the best.
 > You'll vary the ARSG to get maximum spark length.  I
 > wouldn't recommend
 > going above 0.03uF for this
 > set-up.  Also, be sure to be aware of your ARSG
 > speed.  When using a variac
 > to control ARSG speed and a variac to control input
 > voltage to the
 > transformer, you sometimes might
 > get confused with everything that is going on and
 > accidently turn the ARSG
 > speed down when you really want to decrease the
 > transformer voltage.  This
 > can be very bad for the
 > capacitors etc...
 >
 > Hope this helps.
 >
 > The Captain
 >
 >
 >
 >  > I am in the process of building the "Terry blake
 > ARSG gap". I will have a
 >  > 19,500 RPM motor on it, but, thats WAY too fast,
 > so i will put a dimmer
 >  > switch on it (i was going to run the coil, and
 > adjust it while it was
 >  > running to get the best output. Probally around
 > 4000 rpm). I am running a
 >  > 14.4 KV 1.5KVA pt and i was planning to use 2
 > strings of 10 geek group
 > caps
 >  > for a total of .03UF. Should i use more caps?
 > And, is that rating for the
 >  > cap good?
 >  > Thanks
 >  > Adam
 >  >
 >  >
 >  >
 >  >
 >  >
 >
 >


__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo-dot-com