[sdiy] Are there technical reasons that people use 1/8" jacks?

[Graham Atkins]

Yes,

On 22 Aug 2009, at 14:25, cheater cheater wrote:

> Actually I used 1/8" purely to avoid confusion - and instead added
> more :) I'm european, so I like the metric system more tbh.. but let's
> not get into that shall we! :)

My mistake !,

> A question open to everyone: is the 1/4" (7 mm) plug going to have too
> much capacitance for some things, such as FM feedback?
>
> D.


The capacitance (Or impedance) at audio frequencies or short cable runs
is not really an issue. It becomes important at higher frequencies and  
long
cable runs getting into transmission line theory when you are using  
things
like BNC plugs which need to have a fairly good match to the cable  
used e.g.
50 ohms for RF, 75 ohms for video etc. Even then of course the impedance
can only be defined for a fixed frequency.

Graham