A little something from the parts bin?!!! I think my wife would go
off!
Don't worry about the postage, either Bob. If I'm ever in
Cleveland, just buy me a drink! I got the diodes free, I give the
diodes free. 'Nuff said.
I'm just happy to have two of these RM's in the Engine of Chaos.
Ken's enthusiasm for this classic design won me over.
I'll get the goods out tomorrow.
Chub
off!
Don't worry about the postage, either Bob. If I'm ever in
Cleveland, just buy me a drink! I got the diodes free, I give the
diodes free. 'Nuff said.
I'm just happy to have two of these RM's in the Engine of Chaos.
Ken's enthusiasm for this classic design won me over.
I'll get the goods out tomorrow.
Chub
--- In cgs_synth@yahoogroups.com, "R. Drake" <rdrake@d...> wrote:
> Chub,
>
> I'd like to take you up on the offer of a set of diodes, but at
the very
> least let me reimburse you for shipping... if your offer stands,
send to
>
> Bob Drake
> PO Box 585
> Cleveland OH 44107
>
> and I'll shoot you back whatever the postage is, plus a little
something
> from the parts bin...
>
> best
> luigi-bob drake
>
>
> on 7/28/04 5:40 AM, cgs_synth@yahoogroups.com at
cgs_synth@yahoogroups.com
> wrote:
>
> >
> > Message: 1
> > Date: Tue, 27 Jul 2004 13:36:28 -0000
> > From: "charlesosthelder" <osthelder@n...>
> > Subject: Re: Ring modulator questions......
> >
> > The passive ring modulator sounds different because of the losses
> > inherent in the transformers and to a lesser extent, the diodes.
> > However, these losses are frequency specific, making the circuit
> > very "organic" sounding when compared to an active balanced
> > modulator. I liked the sound so much I made a dual RM module.
> >
> > The signal loss is enough for most to add a make up amp. I went
with
> > a non-inverting op-amp with a gain of about 3, followed by a
buffer.
> > This arrangement uses a single TL072.
> >
> > A "ring" modulator is a nickname for a diode-based balanced
> > modulator. Ken's article on his website clearly points out why.
> > This is a very old radio circuit (from the 30's) designed to
improve
> > radiotelephony by using the sidebands of modulated speech.
Sideband
> > information is of higher frequency, and therefore covers a much
more
> > narrow band of radio frequencies. An AM signal is over 6KHz
wide,
> > while a single sideband signal is about 1.5KHz wide. It is also
much
> > easier to filter the sideband signal.
> >
> > Any information you'll need is available in the message archives
of
> > this list. Also, I still have a small cache of germanium diodes
and
> > I'd be happy to send you a matched quartet.
> >
> > Chub