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Re: Natural RF suppression?

I don't have the benefit of personal experience in this matter, but
according to previous posts, aluminum in the gap improves spark length a
great deal. Hey--whatever works!

           --Mr. Postman (Doug Brunner)
                <dabrunner-at-earthlink-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, October 28, 1998 8:41 PM
Subject: Re: Natural RF suppression?


>Original Poster: "D.C. Cox" <DR.RESONANCE-at-next-wave-dot-net>
>
>to: Gary, Bart
>
>I'be said it several times before and I'll say it again --- never use
>aluminum in any sparkgap design.  It will not conduct RF currents anywhere
>nearly as good as brass or copper materials and will greatly reduce your
>overall peak current.  As Terry Fritz pointed out in his recent work the
>primary circuit is very critical to achieving peak currents in the system
>and aluminum will reduce this.  We have also taken many measurements and
>concluded there is no valid reason for using aluminum in an Tesla
>oscillator spark gap.  If your coil is radiating it has more to do with the
>design of the coil and top load.  R. Hull has also pointed out that a
>properly tuned system is not a good radiator.  Don't use aluminum  -- it
>will surpress RF but it's a poor choice.  Example, running a 700 HP drag
>racing engine for occasional trips to the supermarket.
>
>DR.RESONANCE-at-next-wave-dot-net
>
>----------
>> From: Tesla List <tesla-at-pupman-dot-com>
>> To: tesla-at-pupman-dot-com
>> Subject: Natural RF suppression?
>> Date: Wednesday, October 28, 1998 11:02 AM
>>
>> Original Poster: Gary Lau  28-Oct-1998 0735 <lau-at-hdecad.ENET.dec-dot-com>
>>
>> >Original Poster: "Barton B. Anderson" <mopar-at-uswest-dot-net>=20
>> >
>> >Could you elaborate more how you constructed the aluminum standoffs in
>> >between each copper pipe? I was discussing with someone today an idea
>> >of using aluminum components in a sparkgap. Not to conduct energy, but
>to
>> >utilize aluminum's RF suppression characteristic to enhance quenching.
>>
>> What RF suppression characteristic?  Are you saying different metals
>> favor conduction at different frequencies?  I don't think so.
>>
>> Gary Lau
>> Waltham, MA USA
>>
>
>
>