[sdiy] sdiy, real ring modulator schematics

[Ken Stone]

It works fine. I built them like that 20 odd years ago. Lots of fun! In
fact, that sequenc on my site would have been recorded using one.
http://kato.sai.com.au/catgirl/synth/synth/music/ring_mod_sequence_1980.mp3
Ken

>btw:  anyone have that passive ring mod schemo from Synthfool?
>anyone  build it?  results?  interesting?  ( i'm not expecting hi-fi)
>best,
>pH
>
>
>
>Magnus Danielson wrote:
>
>> From: "Happy Harry" <paia2720 at hotmail.com>
>> Subject: Re: [sdiy] sdiy, real ring modulator schematics
>> Date: Thu, 12 Apr 2001 22:26:18 -0000
>>
>> > As I understand it... no. The diodes are biased on by the carrier, and the
>> > signal is modulated by the varying resistance of the diodes... so
>> > the signal should be small and NOT turn the diodes on.
>>
>> Right. Real ring-modulators is used even with very faint signals.
>> We often use diodes below the 0.7V you know ;)
>>
>> > Yes the signal is AC coupled, but the carrier is not. This is like a
>> > VCA as used in the Koeg MS-50 filter... but it is four quadrant instead of
>> > two.
>>
>> Not really, not really.. look again.
>>
>> > I think....   ;^)
>>
>> Good disclaimer Harry!
>>
>> Cheers,
>> Magnus
>
>
_______________________________________________________________________
Ken Stone   sasami at blaze.net.au  
Modular Synth <http://kato.sai.com.au/catgirl/synth/>
Catgirl Paradise <http://www.anime.net/~kens/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>