Re: Vacuum/blast gap

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

Original poster: "Jonathan Peakall by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jpeakall-at-madlabs.info>

Steve,

Are you running the gap at full  vacuum? I found my Lau type gap worked best
when I limited input voltage to the vac motor to around 40V. I have heard of
others just letting the vac system "leak" to lower pressure without a
variac.

HTH,

Jonathan Peakall

----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, September 15, 2002 3:01 PM
Subject: RE: Vacuum/blast gap


> Original poster: "Dave Hartwick by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <ddhartwick-at-earthlink-dot-net>
>
> I use a similar gap, but the air is blown through and into the gap instead
> of being sucked out.
> It blows away my RQ/TCBOR gap, particularly at higher power levels.
>
> You could try blowing instead of sucking, but Gary's original
configuration
> seems to be an excellent gap. It is a mystery.
>
>
> Original poster: "Steven Ward by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <srward16-at-hotmail-dot-com>
>
> Hi all,
>
> I recently attempted to reproduce Gary Lau's sucker gap.  I bought the
same
> vacuum motor.  My meter claims 3A for the motor, yet Gary claims about
> 10A?!?!  Thats not what im getting at.  My problem is that this gaps
stinks!
>   Of course, i could have made it differently, but it doesnt perform
nearly
> as well as me RQ gap.  Though, i must say, it makes the coolest noises
when
> you turn off the coil, and you hear all kinds of pitched wistling from the
> motor.  It sounds real sci-fi, like a major shut down.  Im running with a
> 15/120 PSU.  Im wondering it anyone has used this type of gap, but with
air
> blowing outward??  So basically, i need some ideas, or reccomendations, on
> what i should do.  Sould i keep the RQ and put the vac motor on it??  Or
> should i make the single gap, but blow out the arc, rather than suck it
up?
> All opinions are wanted.  Thanks,
>
> Steve Ward.
>
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