[sdiy] Passive ringmod at higher power

[Toby Paddock]

*Comments inline - Toby

Harry said:

> Maybe not 'quite' right...
> with lower impedance transformers, and diodes capable of higher
> currents and much larger current available from the X source... it
could
> be higher power.
*I've been using coils to listen to AF magnetic fields: xfmrs, tube
oscillators
in an old organ; computers; lightning and stuff. So I thought I'd
breadboard something
that would make (maybe) interesting fields. So it would be "tuned" and
powered by low voltage 60Hz. Full wave bridge maybe for frequency
doubling. SCR or triac for pwm. Stuff like that.

I've got a pair of 8 ohm to 25 volt speaker xfmrs I was going to start
with.

>
> It would be ineffecient, likely... at high power. You'd need buffer
amps
Ha! Effeciency and optimization have no place in this project!

>
> to drive it, etc... and the voltage in the ring portion has to stay
very
> low...
*Ahhh, V in the ring is low. That's what I wasn't seeing.

> but the current could be high.  Before you go there.. the idea that
the
> circuit
> requires 'no external power' will be kind of moot. You'll need LOTS of
> power
> at that point. Drive with a stereo amp perhaps ?  The ring section
will
> take no
> power but the amp sure will.
*No problem, I'l just drive it with a bigger xfmr.  :)

>
> At that point, you'd want an active ring mod (or passive) follwed by a
> buffer amp.
> Cheaper and better
>
> (how much power did you WANT anyway ???   :^)
*Not really a lot. I shouldn't have said *higher power*. I know to some
people here if it won't melt a truck, it's not *higher power*.  :)

Thanks for the tips Harry, it helped.

>
> H^) harry
>
> Toby Paddock wrote:
>
> > I had thoughs about using
> > the passive ring mod
> > http://www.synthfool.com/ringmod.html
> > for higher power, but it looks like
> > you're depending on the impeadance of
> > the X source, xfmr, and diodes for
> > it not to burn up.
> >
> > Is that true or am I not looking at it
> > right?
> >
> > Thanks,
> > Toby Paddock
>
>