[R-390] Orange Drop vs ceramic disc

[Ben Loper]

OK  I can use Orange drops throughout or I can use ceramics for bypass and
Orange drop for anything coupling a signal to the next stage.  This of
course excludes any freq determing applications (micas)

On Thu, Mar 31, 2011 at 9:29 AM, Shoppa, Tim <tshoppa at wmata.com> wrote:

> Please keep in mind that when it comes to ceramic caps, the dielectric
> materials available vary widely in their characteristics.
>
> C0G or NP0 ceramic caps could well be golden in audio applications but
> don't have enough uF per package to be used in most situations.
>
> X7R ceramic caps are probably good enough for not-hi-fi applications.
> Indeed lots of low-end consumer tube stuff from the 60's used ceramic audio
> coupling caps.
>
> Y5V caps literally sound like crap in audio coupling circuits.
>
> The latest SMD ceramic caps and their MLCC leaded cousins, almost certainly
> outperform any 50 year old NOS ceramics we have lying about, every which way
> from Sunday. I look at the high-end microwave SMT ceramic caps (actually the
> highest end ones are glass) and they beat the pants off of any leaded
> component.
>
> Tim N3QE
>
> From: MillerKE6F at aol.com [mailto:MillerKE6F at aol.com]
> Sent: Wednesday, March 30, 2011 6:04 PM
> To: Shoppa, Tim; n4buq at knology.net; r-390 at mailman.qth.net
> Subject: Re: [R-390] Orange Drop vs ceramic disc
>
>  RE: Maxim capacitor paper.....
>
> Granted that at the super low distortion levels  the effects of ceramic
> types can be measured, but  in a typical communications receiver audio
> amplifier section where THD  products of  5 percent or 10 percent are the
> norm,  I doubt if distortion products down 60 db or more are going to be
> measurable let alone heard by mere mortals.
>
>    And the tests were all done on the smaller SMT caps and I'd like to know
>  if physical size makes any difference, especially on the DC voltage applied
> parameter.  Always willing to read a good study.
>
> Cheers
>
>    Bob, KE6F
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>



-- 

“Earth provides enough for every man's need, but not every man's need"