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Old 22nd February 2007, 12:57 AM   #1
Nixie is offline Nixie  Canada
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Even beryllia is safe once cut and clean. I've yet to find a better way to mount devices on heatsinks.
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Old 22nd February 2007, 09:46 PM   #2
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Quote:
Originally posted by Nixie
Even beryllia is safe once cut and clean. I've yet to find a better way to mount devices on heatsinks.

'Tis called the "isolated package".
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Old 22nd February 2007, 11:13 PM   #3
Nixie is offline Nixie  Canada
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Quote:
Originally posted by maxro
'Tis called the "isolated package".
Are you smoking something, maxro? The isolated package has a built in plastic isolation. Beryllia, on the other hand, is almost twice as heat conductive as the aluminum of the heatsink itself, comparable to copper instead (while being an electrical insulator). So what's better, the copper-like heat conductivity of beryllia, or plastic? Indeed, the beryllia is even better than a non-isolated heatsink attached directly to a metal-backed part, because it spreads the heat to a larger initial surface of the aluminum.
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Old 22nd February 2007, 11:46 PM   #4
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The best option seen from an environmental point of view would be the isolated package. When beryllium would be used there will be a time it will end up somewhere in the environment. With a possibility that it ends up in the vicinity of people not knowing the risks.

But people that build such hot amps that really need the beryllia for that last degree difference probably don't care.
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Old 22nd February 2007, 11:48 PM   #5
Nixie is offline Nixie  Canada
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Huh? Beryllium comes from the environment. Nothing wrong with it ending up back there, even if it has been oxidized to beryllia.
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Old 22nd February 2007, 11:50 PM   #6
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Seen like that litterally everything comes from ( and ends up in ) the environment....

http://en.wikipedia.org/wiki/Beryllium

I am glad we finally found a destination for our left-over beryllium.
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Old 23rd February 2007, 12:01 AM   #7
Nixie is offline Nixie  Canada
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Send it to me
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Old 23rd February 2007, 12:04 AM   #8
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I will !
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Old 23rd February 2007, 12:40 AM   #9
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Default toxic stuff

Are you folks for real??

Do you drive a car? There are sooo many everyday hazards out there that noone seems to give a *&^% about, and you're worrying about teflon fumes?

GET REAL!!

I've worked in nuclear reactors, with explosives... with cyanide vats > 1000 gallons... with permanganic/chromic/perchlori acid fumes, HF, you name it... I'm still here.. multi 100KV tesla coils...pipe bombs...

Secret here is... BE CAREFUL!!! Don't do sumpthin stupid...

Not to mention I bult a SPUD GUN that'll launch flaming potatoes 300 meters... ;-)

I worry about alot of stuff... but teflon ...gimme a break... go talk to Al...

John L.
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Old 23rd February 2007, 12:50 AM   #10
Nixie is offline Nixie  Canada
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Default Re: toxic stuff

Quote:
Originally posted by auplater
I've worked in nuclear reactors, with explosives... with cyanide vats > 1000 gallons... with permanganic/chromic/perchlori acid fumes, HF, you name it... I'm still here.. multi 100KV tesla coils...pipe bombs...
But with all these things you take measures to protect yourself. I built a 100 kV X-ray machine in my basement, and I've made anything from abrin to PETN. But continued exposure to low levels of environmental toxicity is much more worse because it's not practical to wear protective gear in everyday life.
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