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Author: Subject: Microwave Chemistry !
aga
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[*] posted on 24-1-2017 at 12:43
Microwave Chemistry !


Yesterday i found a Microwave Oven in the bins.
(yep, aga-bin-raidin')

All that was missing was the glass turntable plate !

That must have been why they threw it out - the rest all works fine, and i already had a pyrex flan tray that fits perfectly !




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tsathoggua1
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[*] posted on 24-1-2017 at 13:13


Found one myself in pretty similar (ish) circumstances and would love to hear of practical attempts at modification to take a RBF of appropriate size and condenser Its more the latter that I find the earliest or most likely break in potential for serious eye damage and worse things than eyes being cooked.

Also, wouldn't it require the custom fabrication of a new resonant cavity> because nigh every lab MW oven intended for chemistry labs seems to be mono-mode in operation.
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aga
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[*] posted on 24-1-2017 at 13:14


I do not intend to modify the oven at all, well, at least not yet ;)



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phlogiston
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[*] posted on 24-1-2017 at 13:59


These two guys experimented with a naked magnetron tube. Insanely reckless, but entertaining:
https://www.youtube.com/watch?v=FIU8WZR9DNA


[Edited on 24-1-2017 by phlogiston]




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JJay
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[*] posted on 24-1-2017 at 17:45


Quote: Originally posted by phlogiston  
These two guys experimented with a naked magnetron tube. Insanely reckless, but entertaining:
https://www.youtube.com/watch?v=FIU8WZR9DNA


[Edited on 24-1-2017 by phlogiston]


That's incredibly entertaining. You'd think that DIY magnetron guns would be more popular.




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j_sum1
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[*] posted on 24-1-2017 at 18:55


Quote: Originally posted by phlogiston  
These two guys experimented with a naked magnetron tube. Insanely reckless, but entertaining:
https://www.youtube.com/watch?v=FIU8WZR9DNA


Hilarious. These guys are the new King of Random in my opinion; and without the obnoxious commercialisation. I just watched charging a mobile phone using induced current from overhead power lines. There is lots of similar stuff there as well.
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Jstuyfzand
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[*] posted on 25-1-2017 at 10:00


I once heard those microwave waves can burn your retina?
If this is not the case, and it feels just like heat (can someone confirm) I have a very interesting use for that old microwave in my shed
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Melgar
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[*] posted on 25-1-2017 at 10:05


They actually have used large microwave transmitters for crowd-control purposes similar to how they use tear gas. Apparently it produces burning sensations in your skin, but without actually doing significant damage. Microwaves would have a hard time reaching your retina through your ocular fluid, in any case. You may be thinking of the sparks from arc welders, which can release high-energy UV, which CAN damage your retina.
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Sulaiman
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[*] posted on 25-1-2017 at 10:43


I would first get a microwave leak detector
e.g. http://www.ebay.co.uk/itm/Microwave-Leak-Detector-3MHz-3GHz-...
then test it,
then mess with the microwave oven,

but the best is to use as intended,
kW microwaves scare me (I've worked from nW to 320 MW peak)




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aga
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[*] posted on 25-1-2017 at 11:53


No need to test - they All leak quite a lot anyway.

Did a few tests last summer, and not even one microwave oven tested was 'properly' sealed.

Best to be away from the thing when it's running, but then you can't see what's going on.

Much safer to do nothing at all, ever, but where's the fun in that ?




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Zyklon-A
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[*] posted on 25-1-2017 at 14:42


Does anyone know if an old mig welder transformer would destroy a average magnetron? Naturally you'd have to reverse the primary and secondary coil for HV. I don't have the MIG's specs ATM but it's definitely at or below average watts.
Point is I'm starving and I need this frozen turkey cooked in 25 minutes tops(:
Also a directional microwave gun would be a trip. sucks it's not possible to focus long distances, at least for amateurs. Think wire mesh is equivalent to a mirror for those frequencies, construct into a maser obviously.
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Sulaiman
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[*] posted on 25-1-2017 at 22:48


google HERF GUN

but do not make one until you know a lot about microwaves
then you would not make one anyway :P





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PHILOU Zrealone
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[*] posted on 30-1-2017 at 02:20


aga,

Aga2telya ;) (I get to tell you)

This might be interesting to you, I found it by a mere accident while searching for a paper for Boffis about benzothiazoles...I immediately thought about your microwave and your future microwave experiments :P

Microwave in organic synthesis pdf




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aga
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[*] posted on 30-1-2017 at 06:22


Lol.

Looks like a good read that there paper.

Depolymerisation of Cellulose (p.43) in 5 mins, 40% glucose yield !

Many thanks Philoo

[Edited on 30-1-2017 by aga]




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