[sdiy] x0xb0x

[Metzger, Michael A]

I met Limor at AHNE and played with the prototype x0xb0x's she brought. I've
never played with a real 303 so I don't know how close the sound is to the
original. Too bad she only brought headphones - it would've been nice to hear it
through an amp. She is trying to use all original components. We talked for a
while about the difficulty of sourcing obsolete trannies. One of the two she
brought had a frosted and etched plastic front panel. Production front panels
are aluminum but the plastic one was cool looking. The build quality seemed
pretty good. Its a nice machine. 

Mike


-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Seb Francis
Sent: Wednesday, May 11, 2005 8:28 PM
To: Synth DIY
Subject: Re: [sdiy] x0xb0x


Fiercefish wrote:

>Apparently the x0xb0x creators used
>all the original components?
>
>  
>
Not quite .. from the website I see they use a BA6110 OTA instead of 
BA662 which is not quite the same (but this is only for the VCA so 
perhaps it's not too critical).

Also I suspect that some of the currently available transistors may not 
be 100% the same as those in the original 303.  For example the website 
says the x0xb0x uses the 2SK30A JFET, but in my 303 schemo there is used 
the 2SK30(O) and 2SK30(Y).

Nevertheless it looks like an admirable effort -  the audio samples do 
sound good, I would say _almost_ as nice as a real 303 - but that's a 
subjective opinion, and remember that actual 303s themselves can vary 
quite considerably in sound.

Seb