[Coco] WTB Orchestra 90 cartridge

[Simon Jonassen]

I would tend to agree that any audio OUTPUT that needs to be AC coupled (eg dc filtered out) should use an electrolytic cap 

just my 2c

/Simon :-)


-----Oprindelig meddelelse-----
Fra: Coco [mailto:coco-bounces at maltedmedia.com] På vegne af Zippster
Sendt: 1. august 2016 15:02
Til: CoCoList for Color Computer Enthusiasts
Emne: Re: [Coco] WTB Orchestra 90 cartridge

Things can get a little weird when you get into audio land with opinions on capacitors, but…

I think ceramic will be fine here considering the value (.1uF), and use (ac coupling).
If we were using a much larger value, I’d probably agree and go electrolytic or film.

In any case, I’ll put a scope on it and take a look at the signals.  
As well as the highly subjective test of human ears.   :)

- Ed


> On Aug 1, 2016, at 2:44 AM, Jayeson Lee-Steere <cocolistemail at titaniumstudios.com> wrote:
> 
> On audio, there are a lot of options about which caps are appropriate for
> audio, but all references I have seen say that ceramics are not an
> appropriate choice in the audio path. Given their strong piezoelectric
> properties, it is not clear to me what are appropriate uses for the
> recently available, high value MLCC ceramic caps. Too bad, because they are
> smaller and less costly than tantalum.
> 
> This reference on audio caps seems fairly balanced:
> http://sound.westhost.com/articles/capacitors.htm
> 
> Film capacitors are the thing to use where practical. It would seem some
> film types are better than others, but for this use, polyester would be
> more than sufficient. That is probably what the small value caps are in the
> original Orch 90. Next down the line are electrolytics, which are
> apparently fine for audio coupling if an appropriately large value is used.
> 
> Jayeson
> 


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