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Old 02 January 2008, 12:39   #11
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No Polwart, I just get wound up a bit by an industry that clearly can make good phones and make them waterproof but doesnt because they wouldnt sell as many as fewer would be dying due to water ingress although most of my phones have packed up at around the 14-18 month mark due to other problems.

I'll keep quiet and only rant in a positive way next time.
NO Okay - sorry that was the conclusion I had come to - I thought you had found a legitiamite reason!
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Old 02 January 2008, 14:52   #12
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we had some sales rep in our place prior to xmas with some solution, name escapes me at present, think it may be Nova,
this barmy git got a std light fitting with normal 240v baynet bulb pluged it in mains sprayed solution and immersed it in bucket of water whilst still holding it, now thats faith or dam right stupid, was amazed to be shaking his hand at the end of the demo. expected to be pumping his chest instead,

there is also a vidio of a tv being sprayed with cover of, then placing in vat of water, strange watching tv under water,
seen the same on tommorrows world about 30 years ago with an electric drill, can of spray and a tank of water
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Old 02 January 2008, 15:45   #13
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seen the same on tommorrows world about 30 years ago with an electric drill, can of spray and a tank of water
Not the same - that was just a normal coating - this is a bit higher tech than that - prob does the same job though!!!
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Old 02 January 2008, 17:20   #14
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Not the same - that was just a normal coating - this is a bit higher tech than that - prob does the same job though!!!
still, it was a brave man to pull the trigger on the drill in a tank of water
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Old 02 January 2008, 18:52   #15
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It is actually not as dangerous even without the coating as it may seem.
As long as he was wearing insulating soles, didn't have the other hand touching a good earth and the water was fresh water he wouldn't have been in much danger of getting much of a shock.
People work on HV equipment quite regularly, as long as the proper precautions are taken it is relatively safe
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Old 03 January 2008, 14:58   #16
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still, it was a brave man to pull the trigger on the drill in a tank of water
i was stood 6ft from this guy, trust me i thought f#@k that, its only a job.
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Old 13 January 2008, 04:24   #17
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water conductivity.

Trust me! water when pure is not a good conductor, in fact its a good insulator. In our laser labs water used to get used for corona suppression on 80000v pulse forming networks,
Also our sputtering magnetrons are water cooled, the water is directly in contact with the back of the target at 1000 volts, pipework is stainless with a foot of plastic tube to isolate the 1kv from the earthed tube, only a few micro amps are lost as long as the coolant is demineralised water.
I would quite happily immerse a 240 volt drill in deionised water and operate it
then again i do have a reputation for being dangerous with high voltages!
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Old 14 January 2008, 05:42   #18
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sputtering magnetrons
what's one of them then?

Sounds like an April Fool to me but it's a bit early
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Old 14 January 2008, 07:07   #19
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Sputtering is a physical vapor deposition, PVD process whereby atoms in a solid target material are ejected into the gas phase due to bombardment of the material by energetic ions. It is commonly used for thin-film deposition, as well as analytical techniques.
The magnetron consists basically of a ring of magnets behind the target material, the target is conected to the high voltage and is in a low pressure gas atmosphere, the gas ionises forming the plasma.
there is a good explanation on wiki.
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