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Re: sunc gap? tuning w/ o-scope?
to: Ross
A small "antenna" fashioned from a simple 3 inch long wire is located via a
coax cable (shielded) at a distance of usually 2-3 feet away from the
operating primary coil (exact distance depends on how large your system is).
Secondary coil can be in place or simulated with a 30 Ohm 2 kva resistor
(nichrome heater elements) connected across the primary coil to simulate the
secondary "load" condition. The system is run and the o-scope will display
the sparkgap firing and show at what time along the 60 Hertz waveform the
spark gap actually "fires". If it is not at the peak of the charging 60 Hz
waveform then the rotor is adjusted on the motor shaft and the process is
repeated. Eventually you will get the system firing right at the top of the
60 cycle peak (actually 2-5 degrees past is best) and your synchronous
rotary gap will be delivering energy as the capacitors reach full charge.
You might also wish to check the archives --- I believe John Freau and Terry
Fritz have posted some data on this antenna construction.
Regards,
Dr.Resonance-at-next-wave-dot-net
-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Wednesday, February 24, 1999 2:11 AM
Subject: sunc gap? tuning w/ o-scope?
>Original Poster: Ross Andrews <sflourine-at-home-dot-com>
>
>
> Hi,
>
> I just have a couple questions for you more experienced coilers out
>there:
>
> -Many people on this list have talked about "120 bps sync gaps". Am I
>correct in thinking that this is a rotary gap driven by a synchronous
>motor?
>
> -I understand the prospect of tuning a coil by the "trial-and-error"
>method, but I have also herd of tuning it with an o-scope. Is this
>feasible? How is it done?
>
> Many thanks,
>
> Ross Andrews
>
> sflourine-at-home-dot-com
>--
>If you want to know what God thinks about money, look at the people he
>gives it to.
>
>