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

[Needham, Alan]

1/8" (sorry - I meant 3.5mm) versus 6.35mm (sorry - I meant 1/4") has to
be purely a matter of taste and/or physical size. I would have thought
any connecter capacitance would be totally swamped by the cable's
capacitance, and this will be too small to worry about on a synth unless
you go up to radio frequencies or have modules with output impedances of
several MegOhms.

As for shorting the signal when inserting a plug, both systems will
suffer equally with this, modules should be robust enough to be safe so
the only time it will be an issue is if you have a signal patched to
several places through a simple, passive multiple - a 'fault' in the
design of the 'mult'?

So, I don't know of any "technical" reason to influence the choice.


-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of cheater
cheater
Sent: 22 August 2009 14:25
To: synth-diy
Subject: Re: [sdiy] Are there technical reasons that people use 1/8"
jacks?

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! :)

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?

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