[sdiy] "VINTAGE AUDIO" capacitors

[KATAYAMA]

Be careful, friends!

I do agree with Paul.
And, I must advise to you that OLD CAPACITORS (about 1972 and before) 
may CONTAINS TOXIC CHEMICAL - PCB(Poly Chlorinated Biphenyl) and its 
alike chemicals.
In almost countries, electronic/electric parts which contain PCB are 
strictly forbidden by law and international treaty(Stockholm Treaty).
We Japanese have had terrible tragedy with PCB-pollution of food in 1960's.



(2011/08/13 10:41), Paul Perry wrote:
> I was actually there 'back in the day' (born in the first half of last
> century!) and I can tell you, there were no "engineered for audio" caps
> back then.
> Plenty of leaky old rubbish, yes. Plenty of caps that MADE their own
> audio, if you like random pops and fizz.
> One of the few advantages of living in these benighted times is that one
> can buy perfectly ordinary caps - much cheaper than back then - and they
> actually have guaranteed characteristics which they meet.
>
> Now it is true that there are SOME caps that have strange voltage
> dependent characteristics that you would not necessarily want in a hi fi
> amp - but I do not think any sane person is going to use miniature
> high-k blue bypass ceramic caps salvaged from an old TV in an audio path
> anywhere.
>
> paul perry Melbourne Australia
> ----- Original Message -----

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KATAYAMA, Takuya
Muse Music Synthesizer Laboratory, Japan