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
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
>