Re: Skull crucibles.

Now if you put the RF stuff inside a metal box and close the door

> before you turn it on, there's no problem at all. You do this every > time you warm up your coffee in the microwave oven. It's perfectly > safe. > > So what's your problem?

The problem is that the amount of power in a microwave oven is relatively small and is carefully generated back inside and carried by a wave guide to spread out all over the inside and the box is carefully designed not to let the stuff out. Even then a small flaw in a microwave door interlock can produce local heating that will cook an area of flesh on the hand. Doing high heating with RF involves building a complicated cylindrical "antenna"/radiator and pumping a lot of wattage into a small area. Meanwhile, on the backside of the antenna, wattages a lot higher than in a microwave are being thrown out. Comparing it to broadcast radio power is absurd, since the radio has to be carefully designed to pick up milliwatts of signal and cooking is done with levels of watts per sq.cm

> > > You're talking about "RF Induction Heating". > > > > RF is VERY DANGEROUS. You don't have to touch it, It will reach out and go > > after you. > > It already has, if you hadn't noticed. It's literally all around you. > If you don't believe it, then take a portable radio and turn it on. > See? That proves that it's all around you. > > Now if you put the RF stuff inside a metal box and close the door > before you turn it on, there's no problem at all. You do this every > time you warm up your coffee in the microwave oven. It's perfectly > safe. > > So what's your problem? > > > Jay > > > > > I did some googling, and found remarkably little, and the one hit on > > > google-groups doesn't quite seem relevant. > > > > > > In brief, these are things in which you pile a heap of powder, run cooling > > > water through the coils surrounding it, then turn on a large amount of RF. > > > Handy for heating things to insanely high temperatures without needing > > > a crucible that can withstand the temperatures. > > > > > > Can anyone point me at any helpfull books? > > > > > > I became interested after finding a brief description of the process of > > making > > > Cubic Zirconia, and it seems like a fun project. > > > > > > -- > > >
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| mailto: snipped-for-privacy@i.am | Ian> > Stirling.> > > -- > @@F@r@o@m@@O@r@a@n@g@e@@C@o@u@n@t@y@,@@C@a@l@,@@w@h@e@r@e@@ > ###Got a Question about ELECTRONICS? Check HERE First:### >
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My email address is whitelisted. *All* email sent to it> goes directly to the trash unless you add NOSPAM in the> Subject: line with other stuff. alondra101 hotmail.com> Don't be ripped off by the big book dealers. Go to the URL> that will give you a choice and save you money(up to half).>
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You'll be glad you did!> Just when you thought you had all this figured out, the gov't> changed it:
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Reply to
Mike Firth
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There is a book I stumbled over that discusses the history and development of making synthetic stones. I tried to check it out on the Dallas Library catalog, but they are down for the weekend. I didn't keep notes as it was just a fun read for me. Seemed a good way to turn a big fortune into a small fortune.

Reply to
Mike Firth

This would more be as a project, without any great hope of making actual money. I've got most of the bits I'd need (large bag of RF powertransistors, ...)

If you happen to find it again, I'd appreciate the ISBN/... Thanks.

Reply to
Ian Stirling

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