[sdiy] "VINTAGE AUDIO" capacitors

[dan snazelle]

there is a link to an interview with him (quote is below)

what does this mean (ac pulse response)


John Gaynor: I am working on several types of capacitors currently but my original capacitors are based on the same material used in the Phillips caps in the 60’s. They are based on a polyester (Mylar) and aluminum foil. Most capacitors today are a metallized polyester. They vacuum impregnate the Mylar with an aluminum spray. They do not have the same AC pulse response as the true film and foil caps and you can plainly hear it.







On Aug 12, 2011, at 9:41 PM, 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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