[sdiy] Alltime best ring modulator circuit... ever?

[Antonio Tuzzi]

yes and the pots must have this color sequence: black white red and green...
;-)

(seems the yamaha cs50 RM...)
at

On Mon, Feb 18, 2008 at 11:24 PM, JH. <jhaible at debitel.net> wrote:
> The best RM circuit has a "quadrant slider" for wet/dry mix, and an
>  attack-decay envelope for FM of the RM's own modulation oscillator, with
>  controls located on the left side of a keyboard.
>
>  *Everything* else is secondary to this, including the choice of ICs.
>
>  JH.
>
>  ----- Original Message -----
>  From: "anthony" <aankrom at bluemarble.net>
>  To: <synth-diy at dropmix.xs4all.nl>
>  Sent: Monday, February 18, 2008 5:58 PM
>  Subject: [sdiy] Alltime best ring modulator circuit... ever?
>
>
>  I was wondering what people think is the best ring modulator circuit, both
>  for use in a modular synth and maybe as an effect for other instruments like
>  guitar.
>
>  I suppose different circuits have their merits, but I was wondering things
>  like: are the circuits with MC1495 or MC1496 or even the MC1595, MC1596
>  better than something built from an OTA? And is there a big difference in
>  results between the MC1495 & MC1496? I think the latter is more readilly
>  available and they seem like nearly interchangeable parts, but the former
>  seems to be more sought after. And I wonder if this is just because there
>  were some classic early circuits that used the early chip and people haven't
>  thought to use the latter chip?
>
>  And how about AD633 ring modulator circuits?
>
>  And since I'm using the old term for what is generally called a
>  four-quadrant multiplier, I should ask about the grandaddy of them all: the
>  simple Ge (or schottky?) diode ring/2-phase-splitter transformer combo. Ken
>  Stone makes a case for this and even sells a popular ready-built circuit
>  (that is always on my Christmas list but I never get...). He speaks of the
>  raw, gritty power of these units that just don't seem to obtain with other
>  ring modulator units. I personally like this circuit. I have built one using
>  classic Hewlett Packard Ge diodes that I matched and 2 transformers
>  (600Ohm:600Ohm CT roughly) that I got from 2 identical telephones (crude
>  tests on my scope showed a relatively high impedence on both sides), but I
>  have yet to test it. I had wanted it to work like a tremolo sometimes, but
>  responses from an earlier post said that that wouldn't really be possible
>  because I couldn't get a really low LFO frequency through that transformers.
>
>  OK! So I think the general answer to which circuit is best would be: it
>  depends on your application. But I do want to know the relative merits of
>  the MC1495, MC1496 & the AD633 and others I've forgotten or just didn't
>  bother to think of.
>  And THEN I would like some opinions on the alltime best ring modulator
>  circuit ever. (Hence the subject of this message...)
>
>
>  cheers,
>  Anthony
>
>
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