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real ring modulator...

real ring modulator...

2004-04-27 by eske500

Hi
I want to create the "real ring modulator"- (http://www.cgs.synth.net/modules/
cgsrr.html)
It looks easier to assemble than others found on the internet... But what are the values
components? I'll be very pleased if anybody can help, either by giving the values or an
alternative schematic....

thanx in advance.

eske500@...

Re: real ring modulator...

2004-04-27 by sasami@hotkey.net.au

All details are already on the appropriate web page! 3k to 3k center tapped
audio transformer x2. Germanium diodes (matched for same voltage drop) x 4.
Any further details are irrelevant. Germaniums are so rare these days you
use what you can find.

Ken
Show quoted textHide quoted text
>Hi
>I want to create the "real ring modulator"- (http://www.cgs.synth.net/modules/
>cgsrr.html)
>It looks easier to assemble than others found on the internet... But what
are the values
>components? I'll be very pleased if anybody can help, either by giving the
values or an
>alternative schematic....
>
>thanx in advance.
>
>eske500@...
>
>
>
>
>See the following URLS for the CGS Modular Synth home page:
>Main: http://www.cgs.synth.net/
>Secondary: http://otherunicorn.0catch.com/synth/
>Yahoo! Groups Links
>
>
>
>
>
>
_______________________________________________________________________
Ken Stone sasami@... or ken@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Re: real ring modulator... a bit OT

2004-04-28 by Richard Brewster

Would you believe me if I told you all that one of the first electronic
kits I built as a kid was an intercom, a simple audio amplifier. It
used three germanium *transistors*. Neat kit from General Electric.
Early 1960's. It is in a clear plastic housing about 3 x 8 x 10 inches,
with the circuit diagram painted on a masonite board that holds
spring-clips into which all the components are fastened. No soldering.
Each resistor, capacitor and transistor is positioned right above its
symbol on the diagram. I still have this, and I think it still works.
Those transistors are really wild looking, large metal cans.

-Richard Brewster

sasami@... wrote:
Show quoted textHide quoted text
>All details are already on the appropriate web page! 3k to 3k center tapped
>audio transformer x2. Germanium diodes (matched for same voltage drop) x 4.
>Any further details are irrelevant. Germaniums are so rare these days you
>use what you can find.
>
>Ken
>
>
>
>
>

Re: real ring modulator...

2004-04-28 by sasami@hotkey.net.au

10V signals are fine. I had no problems driving them with any of the CGS
stuff, Roland etc.

Ken
Show quoted textHide quoted text
>BTW, no problem with 10V signals?
>What will be it's (approx?) range?
>
>f
>*
>
>
>
>
>
>See the following URLS for the CGS Modular Synth home page:
>Main: http://www.cgs.synth.net/
>Secondary: http://otherunicorn.0catch.com/synth/
>Yahoo! Groups Links
>
>
>
>
>
>
_______________________________________________________________________
Ken Stone sasami@... or ken@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

Re: real ring modulator...

2004-04-28 by bbluthang

there seems to be a few germanium diodes in akihabara
i bought some marked '26' for Y30 each.

is there a range of suitable transformers, i found some 2k ones?
andrew
Show quoted textHide quoted text
--- In cgs_synth@yahoogroups.com, sasami@h... wrote:
> 10V signals are fine. I had no problems driving them with any of
the CGS
> stuff, Roland etc.
>
> Ken
>
> >BTW, no problem with 10V signals?
> >What will be it's (approx?) range?
> >
> >f
> >*
> >
> >
> >
> >
> >
> >See the following URLS for the CGS Modular Synth home page:
> >Main: http://www.cgs.synth.net/
> >Secondary: http://otherunicorn.0catch.com/synth/
> >Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
>
______________________________________________________________________
_
> Ken Stone sasami@h... or ken@c...
> Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
> Australian Miniature Horses & Ponies
<http://www.blaze.net.au/~sasami/>

Re: real ring modulator...

2004-04-28 by sasami@hotkey.net.au

The transformers are not too critical. A 3k impedence one actually measures
at around 250 ohms DC resistance on a multimeter. My really early (24 years
ago) ones actually used some really low impedence parts, and they still
worked. The reason we don't want low-imedence is the divider effect of a
synthesizer's 1k output resistor in line with a low impedence would cause a
significant signal drop.

Ken
Show quoted textHide quoted text
>there seems to be a few germanium diodes in akihabara
>i bought some marked '26' for Y30 each.
>
>is there a range of suitable transformers, i found some 2k ones?
>andrew
>
_______________________________________________________________________
Ken Stone sasami@... or ken@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

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