MOTM

Yet another teaser, although this one's more "straight-forward"

www.synthtech.com/misc/m510.pdf

Sorry for the weird PDF, I hate Corel Draw! (and computers in general).

Demo (the old one, or it's NEW if you've never hear it):

www.synthtech.com/demo/wavewarper.mp3

Paul S.

hi there,
could someone explain in simple terms what a wavewarper exactly does 
or perhaps post a link to a site that explains this - i've been 
looking for quite some while - thank you,
tenor!

I know this has been discussed before and I have
reviewed Dave's excellent pages on the subject.

     http://www.hotrodmotm.com/distribute.htm

     http://www.hotrodmotm.com/distribute_sod.htm

But I am at a loss on the details.  And thumbing
through my parts catelogs isn't helping.

I have currently enabled a psuedo-star configuration
with a couple of 12 header boards (Paul has removed
these from the current catalog and they are not listed
on the order page and I can't remember the part
number.) coming off of the board in my '900 (using
standard MOTM power cables).

I am not quite sure whether to use the terminal block
on the '960 or the faston terminals.

What terminal block (brand and model number would be
great!) to use coming out of my '900.

For a true star configuration, do I need to bypass the
distribution board on the '900, go out to the terminal
block and then run power to each of the distribution
boards from there (including the distribution board on
the '900 itself)?  Are people removing the
distribution board from the '900 altogether in this
scenario?

What types of cable is being used between the PSU and
terminal block?  Between the terminal block and ther
distribution boards.  (I know this was posted
perviously by Larry or Dave, but I can't find it.) 
Does the type of wire need to change if I drop in a
larger power supply?

Someone has mentioned here before recommendations for
systems with multiple power suppliers.  Could someone
please restate them for me?

Are new '900s coming with '960s installed?  IS it
possible to swap them out one-for-one with no
modifications be made?

Why does the '960 include both faston headers and 2
terminal blocks?

How will all of this be affected when the '950s are
released?

What did I forget to ask to do this properly?  I don't
know enough yet to know what else to ask.

BTW, this is primarily intended for a mutiple cabinet
enclosure which may sometimes be transported to gigs.

Thanks!
Shemp (The 'Coarse' Stooge  ;-P  )

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--- In motm@y..., "tenorrusse" <tenorrusse@y...> wrote:
>
> could someone explain in simple terms what a wavewarper exactly does 
> or perhaps post a link to a site that explains this - i've been 
> looking for quite some while - thank you,

I think Paul has a pretty good description on the news page "basically 
a small analog computer" - meaning that with this module you can 
multiply waveforms, divide waveforms, raise to powers or take roots.  
So here is something to think about:

A common "math function" in an analog synthesizer is the VCA where you 
are essentially multiplying an "audio" waveform with a control 
voltage.  Another common operation is a ring modulator where you are 
multiplying two "audio" waveforms.  So you could do things like this 
with an analog computer but, being a "generic" computational unit, you 
can come up with other possibilities:

If you start with a pure tone (sine wave) and raise it to a power, 
harmonics are added to that pure tone.  If you were looking at the 
waveform on an oscilloscope, the higher the power you rise to the more 
"spiky" the sine wave will become.  (It will start to look something 
like a bell curve.)  Alternately, if you were to raise to a fractional 
power (take the root) the sine wave will start to "flatten out" - the 
larger the root, the flatter the tops of the waveform.  (In other 
words, it will start to look like a square wave.)  So in this example, 
you have something of an "un-filter" module - adding harmonics instead 
of removing them.


So Paul - is there an expectation as to cost of this 510 yet?  It 
seems useful - as in it would be cool to have more than one in a 
system :)


Seth

> ----- Original Message -----
> From: Tentochi <tentochi2003@...>
> I am not quite sure whether to use the terminal block on the '960 or the
faston terminals.

As I see it, it really makes no difference.  I used the screw terminals only
because I prefer lugs to faston terminations.  Paul has made it with
multiple connections which might tempt one to daisy chain from one 960 to
another.  I avoided that temptation and only used one terminaltion on each
960.

One issues I had with the 960s is tightning of the screws.  The terminal
block itself is not attached to the circuit board other than the solder
connections.  So, I think people like me (remember I torqued a screw out of
the back of a 700 panel once) could damage the connection if not careful
when tightening.  I was sure to hold the terminal block and not the PCB when
putting the final trun on the screw.

> What terminal block (brand and model number would be great!) to use coming
out of my '900.

In my opinion, "Marathon" brand terminal blocks are the best.  They are used
widely in industry for terminations where circuits are critical.  I used the
1600 series blocks.  But, I admit that they are total overkill and at least
4 times what is required.  But, I removed them from retired stuff that gets
tossed out at work.

> For a true star configuration, do I need to bypass the distribution board
on the '900, go out to the terminal block and then run power to each of the
distribution boards from there (including the distribution board on the '900
itself)?  Are people removing the distribution board from the '900
altogether in this scenario?

Todd, I have never had a 900 in my hands.  So, I cannot see exactly what you
mean.  But, if the wire size is large enough, you can create a star
"electrically" while it might not have the exact physical characteristics of
a star.  Just use overkill for the wire size from as close to the power
supply terminals as possible directly to each PCB board.  Then, each module
connects from there.  So, really you don't have a true star to each module.
But, if the wire from the power supply to each PCB is short and large,
electrically, those PCB appear to be right at the supply compared to the
resistance in the MOTM power cables.  I certainly cannot recommend jumping
from one PCB to the next with regular MOTM power cables used as a jumper.

> What types of cable is being used between the PSU and terminal block?
Between the terminal block and the distribution boards.

Is does not matter as long as the wired size is significanly larger than the
MOTM power cable wires.  I use # 12 or # 14 stranded copper.

> Does the type of wire need to change if I drop in a larger power supply?

How large is the question.  I am using a 5 amp supply.  Since the distance
is so short, I am staying with # 12 wire, which has a conservative current
rating of 20 amps.  I did think about jumping the wire from the supply to
the distribution block up to # 10.  But, since the measurement was only
about a foot, I curbed my anal tendency and left in the # 12.

> Someone has mentioned here before recommendations for systems with
multiple power suppliers.  Could someone
please restate them for me?

Wasn't me.  But, I think that is a good question.  Should PS ground be
bonded between supplies?  Certainly AC case ground needs to be tied down on
both.  You can have all kinds of problems if you don't.

> Why does the '960 include both faston headers and 2 terminal blocks?

User choice as I saw it.

Larry (not an engineer)

>
> I think Paul has a pretty good description on the news page "basically
> a small analog computer" - meaning that with this module you can
> multiply waveforms, divide waveforms, raise to powers or take roots.
> So here is something to think about:
>

((snip))

That was a correct description. The module is kind of like an Xpander filter, in the sense it
switches inter-connections of log amps to create the warping. The Xpander switches around
integrator sections and resistors to create different filters. That's where I got the idea :)

No exact cost until Dec. 1st. But, it *is* going to be a kit, and uses the current power supply.
Be aware that *most* new modules in the 500/600 series are NOT kits, because they use parts that
either:

a) only come in SMT
b) have so many parts that it doesn't make sense to have kits

Paul S.