Hi Charles (and everybody else)
Sory I didn't answer for so long time. But I've been buisy with
school. So I hadn't any time for building electronic stuff.
Thank you a lot for your offer with the Ge-diodes but I think it's to
expensive and complicated to send just a few diodes to Switzerland.
I'll look in some old gear if I can find some of these diodes.
But I'm interested in your RM output circuit with the TL072. Could you
e-mail it to me? Thaks a lot for your help!
Cheers Luke
--- In cgs_synth@yahoogroups.com, "Charles Osthelder" <osthelder@...>
wrote:
Sory I didn't answer for so long time. But I've been buisy with
school. So I hadn't any time for building electronic stuff.
Thank you a lot for your offer with the Ge-diodes but I think it's to
expensive and complicated to send just a few diodes to Switzerland.
I'll look in some old gear if I can find some of these diodes.
But I'm interested in your RM output circuit with the TL072. Could you
e-mail it to me? Thaks a lot for your help!
Cheers Luke
--- In cgs_synth@yahoogroups.com, "Charles Osthelder" <osthelder@...>
wrote:
>
> Hi Luke!
>
> The parts for the ring mod are in the archives of this list. The
> best transformers have a around 10K primary impedance and 2K
> secondary. The DC resistance is about 600 ohms and 160ohms
> respectively. Mouser has two transformers that work quite well. The
> larger is part # 42TM002 and the smaller (nice for pcb mounting) is
> part # 42XL002.
>
> The Ge diodes are a little harder to find, but I'd be happy to match
> a set for you free of charge. Just send me a mailing address and
> I'll get them out to you.
>
> It seemed a good idea to add a makeup amp and buffer to the output of
> the RM circuit. Mine uses a TL072. The non-inverting amp has a gain
> of 2 (or so...) and the output of the buffer connects to the output
> through a 1K resistor for short protection.
>
> Chub
>
> --- In cgs_synth@yahoogroups.com, "poketo77" <poketo77@h...> wrote:
> >
> > Hi anyone
> > Recently I found Ken's page about his Modular synth. It's a great
> page!
> > So now I've a question about the real Ringmodulator:
> >
> > Somehow I couldn't find some rigt transformers.
> > What type of transformers are used in the Ringmodulator? It would
> be
> > nice if you could tell me the ... as well.
> > Could you give me a suggestion about the Ge-Diodes? I read
> somwhere,
> > that usually Shottky-Diodes (I don't know if they are caled so in
> > English) were used for ringmods.
> >
> > I hope you understand what I'm writing... English isn't my mother-
> > tongue...
> >
> > Thanks for your help!
> >
> > Cheers Luke
> >
>