Re: Cooking with the primary

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

Original poster: "Laurence Davis by way of Terry Fritz <teslalist-at-qwest-dot-net>" <meknar-at-hotmail-dot-com>

doesnt path loss, err... rf dissipation factor have a play here?
100 watts at 200khz is far more desirable then 100 watts at 1ghz (or even 
2.4ghz :)
hmmm....  whats the rf dissipation factor of brain matter?

larry.


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: Cooking with the primary
>Date: Fri, 15 Aug 2003 08:00:02 -0600
>
>Original poster: "Paul Marshall by way of Terry Fritz 
><teslalist-at-qwest-dot-net>" <klugmann-at-hotmail-dot-com>
>
>My thoughts on this are "If a cell phone transmission may cause brain 
>cancer, what are these CW coils doing to us" ?
>
>
>
>Paul S. Marshall
>
>
>
>
>
>>From: "Tesla list" <tesla-at-pupman-dot-com>
>>To: tesla-at-pupman-dot-com
>>Subject: Re: Cooking with the primary
>>Date: Thu, 14 Aug 2003 06:54:36 -0600
>>
>>Original poster: "sebastian gaeta by way of Terry Fritz 
>><teslalist-at-qwest-dot-net>" <sgtporky-at-prodigy-dot-net>
>>
>>Hi,
>>
>>I did a bit of accidental cooking with my 304TL coil. I used too large of 
>>a topload, and too large of a tank cap. The large tank cap caused me to 
>>use too few primary turns which causes a larger RF current to flow. 
>>According to Bert H. too large of a toroid also caused some large 
>>circulating currents to flow.This all added up to trouble, and caused the 
>>bottom bolt on the secondary to get so hot that it melted the solder 
>>connection. My wooden support burned all along where the bolt, and ground 
>>strap contacted it.
>>
>>Continuous wave coils are much better at cooking than spark gap systems 
>>by the way.
>>
>>Please be careful. When there is no secondary, and sparks to dissipate 
>>the energy, you are going to have lots more RF floating around, which can 
>>be nasty if you are wearing jewlery, and harmful to other electronic 
>>devices nearby. You will also get an RF burn off of practically every 
>>thing conductive that you touch, whether it is grounded or not. If your 
>>OFF switch is metal like mine was, use a plasic rod or something to flip 
>>it off with. If you absolutely need to touch something metal while the 
>>coil is running you will need to equalise your RF potential by bonding to 
>>it with a metal object that is already in your hand like a key or 
>>something before you can touch it with your bare skin. When you wish to 
>>draw your hand away, you will have to make contact with the key first 
>>before you break electrical contact with your skin, otherwise you will 
>>draw an arc and get an RF burn. This all sounds very bizzare, but welcome 
>>to the world of high powered radio!
>>
>>Have fun, and play safe,
>>Sue
>>
>>Tesla list <tesla-at-pupman-dot-com> wrote:
>>Original poster: "John by way of Terry Fritz "
>>
>>Hello,
>>I came up with an idea after looking at induction heaters on the Internet.
>>I was wondering if one could remove the secondary coil from the middle of
>>the primary and instead place something to be cooked. At high enough
>>frequencies this should work.
>>
>>John