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Re: Can anyone help ?
to: Cabbot
If you are running a pole pig I would suggest 450-480 bps for good results.
Run a 1/2 hp rotor 12 inch dia with 10 electrodes on rotor. Run a
standard 1725 rpm motor with resilent mounting to prevent vibration. A
synchro rotary uses a true synchronous rotor with 4 electrodes so each
rotary electrode lines up with the stationary electrode when the cap hits
full charge on the 60 Hz sine waveform of the power line. It works on the
same principle as an electric clock is synchro with the 60 Hz line current
to provide accurate time. A 4 electrode synchro motor runs at 1800 rpm and
fires 120 bps (60 pos peaks and 60 neg peaks per second). Forget the
sawblade -- it will work but not efficiently because the material is not a
good conductor of the high peak current at RF frequencies. Use only brass,
copper, tungsten in your design and skip the steel, carbide, and stainless
steel. With this size cap you are planning on using, these materials will
cost you 60-200 amperes in lost peak current -- bad Q, etc.
DR.RESONANCE-at-next-wave-dot-net
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From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com
Subject: Re: Can anyone help ?
Date: Thursday, September 10, 1998 6:46 PM
Original Poster: Cabbott Sanders <cabbott-at-cyberis-dot-net>
> <snip>
> A synchro rotary will give you the best output in most
> applications with small and medium size units.
>
Can someone please precisely define a synchro rotary? I made my rotary out
of
a skillsaw blade cut into an 8 pointed star, spinning at about 5400 rpm,
with 8
terminals. (pulley powered). this gives me about 720 pulses a sec. i will
have
to slow it down to about 400 pulses /sec. now, what makes a synchro rotary
a
synchro rotary? I have 15 kva pig and .161 mfd maxwell cap. what formula
would you use to find the optimum pulse rate?
> DR.RESONANCE-at-next-wave-dot-net
>
> ----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Can anyone help ?
> Date: Wednesday, September 09, 1998 10:29 PM
>
> Original Poster: RWB355-at-aol-dot-com
>
> Hello all,
>
> This mail is about RSG´s. I need some help.
>
> My thoughts about gaps/caps/xformers
>
> (Always for biggest bang size)
>
> If the cap is too big (for a given xformer) you will never fully charge
it,
> so
> you will only dump the charge voltage the cap reaches in 1/120 sec. I.e
if
> your xformer can supply 15kV and your cap is so big that it will only
> charge
> to 9kV (e.g.) you might as well only use a 9kV xformer (with a proper
cap),
> right?
>
> Now, if I do the opposite and run a too small cap, the xformer can charge
> it
> to max volts, but I won´t be pumping the max energy possible into my
> primary
> tank, right?
>
> This would tell me to get the biggest cap possible, that my xformer can
> still
> charge to its max voltage, right? (For biggest bangs)
>
> Let me continue on with my ramble: If I now use a rotary gap instead of a
> staic gap I can exceed the line BPS (you guys:120 // me: 100 BPS), right?
> This
> would, however mean the cap HAS to be smaller (because of less time to
> charge
> it) than on a static gap, right?
>
> Now comes my question:
>
> What is the relationship between xformer, cap size and BPS? Is there a
> formula
> out there that would tell me what cap I need for a given xformer and BPS?
> If
> so, lemme have it.
>
> Thanks for all,
> Coiler greets from germany,
> Reinhard
>
> ----------
--
Cabbott Sanders
Salem Oregon
Website: http://members.aol-dot-com/cabbotttt
Phone 503-390-8992
Cel 503-930-9173
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