<Noxz2>
somehow stumbled into magnetron design today.. the aim I was looking at is not for sputtering like you may have guessed, but actually for heating
<Noxz2>
thus resonant cavities are needed
<Noxz2>
havent really found why heating the cathod is necessary, but I am sure I will find that info at some point
<Noxz2>
but yeah, I was more or less searching for a small microwave trnasmitter
<Noxz2>
for heat
<Noxz2>
instead of, say, nichrome or calrod to heat stuff up
<Noxz2>
the actual application was actually for a smoke generator, like for music events, somehow popped into my head last night, I did look into homemade smoke gens before, and they all basically use an electric heating block that takes a while to heat up, and just thought: what if...
<Noxz2>
k, going to leave to go home shortly, but though I would pop that in here just cuz..
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<Noxz>
so heating helps overcome the energy required.. and things like barium naturally flick off electrons (sorta like alkaline metals lose their single electron very readily)
<Noxz>
work even better when heated
<sync>
why don't you just buy a commercial microwave magnetron and design a chamber around it?
<Noxz>
I want a tiny one
<Noxz>
not 1kw
<Noxz>
by chamber, you mean oven/cavity
<Noxz>
i assume
<Noxz>
I want something on the order of under 100w
<Noxz>
maybe even less
<sync>
why not just use a resistive heater with a temperature controller?
<Noxz>
the point is to not use a resistive heater to heat stuff
<sync>
sure, but there is no need for it to take a while to heat up
<sync>
if you have a fairly dynamic heating system there is no reason why it should take a while to heat up
<Noxz>
I also have a lab microwave that I am trying to rig up a bit better, and was sorta curious yet again on the internals
<Noxz>
also moving soon, so all my science shit is boxed up
<Noxz>
I tried searching for tiny/small magnetrons and nothign really showed up
<Noxz>
that's what I did first
<Noxz>
then went onward into: how hard would it be to make one
<sync>
quite
<Noxz>
meh
<Noxz>
not impossible
<Noxz>
even synthesizing barium oxide isnt a stretch
<sync>
the problem is not making them, but getting them to work
<sync>
the ceramic to metal seals are not trivial to get right
<Noxz>
I have not yet looked into what they actually do just yet
<Noxz>
transmit the energy from the resonating metal to air?
<sync>
wat
<Noxz>
what is the point of the ceramic
<sync>
keeping the air out
<Noxz>
oh, sure
<Noxz>
no rubber gasket, I suppose
<sync>
well you have to put vacuum in there
<sync>
and to keep it in there you have to somehow seal stuff against the copper body
<Noxz>
yeah, I was thinking about that too
<Noxz>
it's not really in the books to make one, I was just pondering the idea
<Noxz>
like, what would be required to make one at home
<Noxz>
if at all possible
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<SpeedEvil>
You buy them.
<SpeedEvil>
PWM an ordinary one
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<lain>
get an inverter microwave :>
<lain>
those can run at any given power level continuously, as opposed to the usual microwaves which will pwm at like 1 cycle per 30 seconds
<Noxz>
yeah, my lab one wasnt as good as I thought it wa in the end, electrical wise