Yes. It's in .1V increments, so if you see 100, then it's 10.1V
This is taken at 20V .5A and mounted on a warm heat sink.
😎
Interesting.
If you were to use a switching supply on this amp. Do you have a preferred switcher that is up to the task?
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I think the material is ceramic😉
Good insulator for high voltage but maybe not good for heat through...🙄
Like Nelson said they look like Beryllium Oxide. They can be a little brittle so careful tightening them but I don't think anything beats them for low thermal resistance. I think I saw a statement that they conducted heat better than aluminum. Back in 1977 I think they had a retail price of about $ 3 each !
Beryllium Oxide is a ceramic.
Beryllium Oxide is an excellent conductor of heat, yet it is an insulator electrically.
As Nelson has mentioned though, it is VERY TOXIC if particles (as dust or smoke) are inhaled.
If it is B.O.(sometimes named Berlox), DO NOT break, or grind, or sand or modify it in any way that could release any as dust particles which could be breathed in.
It's manufacture is highly regulated in the USA and has been nearly put out of business because of it's waste byproducts.
Do not let your children play with any B.O. products.
Safety First.
Know what you are dealing with !
Best Regards
Beryllium Oxide is an excellent conductor of heat, yet it is an insulator electrically.
As Nelson has mentioned though, it is VERY TOXIC if particles (as dust or smoke) are inhaled.
If it is B.O.(sometimes named Berlox), DO NOT break, or grind, or sand or modify it in any way that could release any as dust particles which could be breathed in.
It's manufacture is highly regulated in the USA and has been nearly put out of business because of it's waste byproducts.
Do not let your children play with any B.O. products.
Safety First.
Know what you are dealing with !
Best Regards
Thanks for helps! Yes, I guess it's Beryllium Oxide Ceramic and good conductor of heat
Beryllium Oxide Ceramic - heat sink interface material
Beryllium Oxide Ceramic - heat sink interface material
Just don't be tempted to scrape off that gunk on them! Maybe some solvent like acetone would work
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Wow - a whole bag full of unobtanium! When I first started looking into insulators about 15 years ago, Beryllium Oxide was listed as having the best thermal characteristics and had long since been banned from sale. Do pay attention to what others have said concerning breaking, scraping, or any other activity that produces dust or particles.
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Not to downplay the cautions about BeO, but it is a very hard ceramic and is rather hard to break. It doesn't flake off or rub into a powder or anything. It is particularly dangerous to fabricate and process, but ot so much to use when it is a thick enough solid.
I would guess (at the moment I do have my periods table of elements with me on the beach) that BeO has a very high hardness like aluminiumoxide. So you can polish tjhe surface, but solvent would get the dust liquefied. Don't try to change the surface.
"Help of spell correction"
I meant:
...but solvent wouldn't get the dust liquefied. It more like the stuff on sanding paper.
I meant:
...but solvent wouldn't get the dust liquefied. It more like the stuff on sanding paper.
Or they could be regular type ceramic. I have some ceramic insulators that aren't BeO and they look just like that- white ceramic, but their heat transmission is nowhere as good..So I guess we just don't know, so have to err on the side of caution
Not trying to liquefy the dust, discussing how to remove that old grease or whatever on them, without scraping.
Not trying to liquefy the dust, discussing how to remove that old grease or whatever on them, without scraping.
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Large difference in thermal conductivity between BeO and Al2O3
BeO 260 W/mK
Al2O3 36 W/mK
I bought a stash of BeO insulators for my A40 build which still isn't finished, maybe some day. They are very difficult to find now.
Craig
Craig
The alumina insulators (particularly if you can find the 0.6mm types) work very well, though. I posted somewhere on this forum some measurements I made, did much better than mica.