[sdiy] Advices for ringmod and noise source

[Linium]

Thank you everybody for all the answers i gathered ! :)

So from my own sum-up, AD633 based design would be the most accurate:
I found one from Roman Sowa, here :
http://www.sowa.synth.net/rm.html

Ken Stone on his own quest for beautiful raw sound prefered a germanium 
matched diodes design with transformers:
http://www.cgs.synth.net/modules/cgsrr.html

Jurgen Haible give a schemo on his web of an OTA based design that would sound 
interesting with some non-linearities:
http://www.oldcrows.net/~jhaible/tonline_stuff/jh1_ring.gif

A very simple design from ARP:
http://www.simple-answer.com/ARPring.gif

The Don Buchla's design:
http://rubidium.dyndns.org/~magnus/synths/companies/buchla/Buchla_4100_4_200.jpg

Well , they are probably tons of other. Too bad that the Ken Stone's design 
seems to require germanium matched diode and transformers, but since i may 
order some germanium diode for some guitar FX, may be...
On the other hand, the Jurgen Haible's design appeals to me since it is seems 
to be one with an interesting sound.
Last, the ARP one is brain dead easy to build, seamingly.

Thks again for all the inputs, for the noise source i need to think about it a 
little more, i will see later.

Cheers,

Linium