Hello Bakis,
Shields, as in your typical single-ended phone <=> phone or Mini-
phone cables, are not suitable for grounding. These are not
connectors! (that's they are called plugs and jacks as a seperate
class from a connector)
My friend at National semi, Bob Pease, told me, "Phone jacks are
most closely related to relays as the "shield" is always floating -
held in place by a mechanical spring loaded 'tip'".
A connector, on the other hand, has all it's contact wiring points
held individually by means a bi-fricated cup that grasps on two
sides of its mating male "pin".
The correct way to do it, Bakis, is to use what is called
a "telescoping" shield wiring, were the shield is only connected on
one end of the cable, but extends the lenght of the run and is then
terminated (un-connected) as near to the opposite plug break out as
possible. That way the shield "drain" goes in one direction thus
prventing "ground loops" as the small potentials from the different
power supplies involved are unequivalent and can create both
unwanted audio (buss, noise radio pickup , etc.), sub-audio (DC/AC
offsets that eat up power bandwidth) and sometimes super-audio
oscillations (stuff you can't hear, but can damage or compromise
equipment).
The way to ground systems is through connecting the PS commons using
16 awg or better wire.
This isn't a scare tactic as I'm not against inter-system workings.
However, I am promoting more care and a deeper understanding of the
requirments of the "interface" before you break out the marshmellows
to cook 'em up on your rigs.
0000XXXx
Chip_Puller
--- In SergeModular@yahoogroups.com, Bakis Sirros
<synth_freak_2000@...> wrote:
_______________
category=shopping
Shields, as in your typical single-ended phone <=> phone or Mini-
phone cables, are not suitable for grounding. These are not
connectors! (that's they are called plugs and jacks as a seperate
class from a connector)
My friend at National semi, Bob Pease, told me, "Phone jacks are
most closely related to relays as the "shield" is always floating -
held in place by a mechanical spring loaded 'tip'".
A connector, on the other hand, has all it's contact wiring points
held individually by means a bi-fricated cup that grasps on two
sides of its mating male "pin".
The correct way to do it, Bakis, is to use what is called
a "telescoping" shield wiring, were the shield is only connected on
one end of the cable, but extends the lenght of the run and is then
terminated (un-connected) as near to the opposite plug break out as
possible. That way the shield "drain" goes in one direction thus
prventing "ground loops" as the small potentials from the different
power supplies involved are unequivalent and can create both
unwanted audio (buss, noise radio pickup , etc.), sub-audio (DC/AC
offsets that eat up power bandwidth) and sometimes super-audio
oscillations (stuff you can't hear, but can damage or compromise
equipment).
The way to ground systems is through connecting the PS commons using
16 awg or better wire.
This isn't a scare tactic as I'm not against inter-system workings.
However, I am promoting more care and a deeper understanding of the
requirments of the "interface" before you break out the marshmellows
to cook 'em up on your rigs.
0000XXXx
Chip_Puller
--- In SergeModular@yahoogroups.com, Bakis Sirros
<synth_freak_2000@...> wrote:
>_____________________________________________________________________
> if you ground the Serge (you will anyway, right?), the
> ground is then transferred thru the minijack cables to
> your minijack modulars. so cross-patching is fine. i
> do it all the time.
> if you want to cross-patch with another banana modular
> then you have to ground the two banana modulars
> together. the serge psu has a black ground banana jack
> that is for tha purpose. i use that too and i also
> cross-patch between my serge modular and my bananafied
> Metalbox frac modules all the time.
> everything works fine...
> Serge should not be a 'closed system'.
> Harry?
>
> best regards,
> Bakis.
>
>
> --- kkonkkrete <kkonkkrete@...> wrote:
>
> >
> > Hello Mr. Tique
> >
> > Good point. I am very much a 'user' rather than a
> > 'developer' of
> > analogue things, so that hadn't even crossed my
> > mind. Could be very
> > dangerous I suppose. I'm used to just sticking my
> > patch cables into
> > any old sockets that come along, as long as it's
> > V/Oct, I just assumed
> > it would be OK. Perhaps it's better for me to treat
> > any prospective
> > serge acquisitions as closed systems, rather than
> > attempt to bridge
> > the gaps...
> >
> > any insight on the speed of the S&H unit?
> >
> > -- K0nk
> >
> >
> > --- In SergeModular@yahoogroups.com, "Harold Tique"
> > <sts7@> wrote:
> > >
> > > Hello Mr. Krete,
> > >
> > > I'm glad that all the great guys here in the SMOG
> > either have been
> > > helpful in showing the wonders the 'Greek orgy'
> > style of Serge inter-
> > > patchability.
> > >
> > > I personally have been through many synthesizer
> > architectures and
> > > patching paradigms (Buchla & Moog & EMS) and,
> > after all that, found
> > > the Serge far and away both the most flexible and,
> > most important,
> > > the most exciting & fun to play with!
> > >
> > > The question of "interface" is, on the `face' of
> > it, a simple
> > > matter of basic jack/plug type 'sex changes'.
> > >
> > > The reality of it is more complex, even in this
> > beautiful world of
> > > analogue we float in. There are several 'schools'
> > of thought
> > > prevailing out there representing the 'best' way
> > to accomplish the
> > > interconnectivity of the modules, set by the
> > designer's personal
> > > preferences and existing standards set down by the
> > audio/broadcast
> > > industries before them.
> > >
> > > One must do some study of the exact voltage
> > requirements, plus
> > > current source/sink and impedance considerations,
> > to begin the
> > > process of providing the mortar on which the
> > bridge to
> > > successful 'interfacing' rests.
> > >
> > > The single most important part of building this
> > 'bridge', and the
> > > most misunderstood, is the common referencing of
> > the two (or more)
> > > involved systems' signal and power "grounds".
> > >
> > > Deeper specifics fall into the range of
> > consulting.
> > >
> > >
> > > Cheers,
> > >
> > > Harry
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > --- In SergeModular@yahoogroups.com, "kkonkkrete"
> > <kkonkkrete@>
> > > wrote:
> > > >
> > > >
> > > > Hi ---
> > > >
> > > > It's all slowly beginning to sink in. It really
> > is amazing how
> > > > diverse these units are --- I never realized how
> > 'conventional' I
> > > was
> > > > in my whole approach to modular synthesis.
> > > >
> > > > I'm sorry for yet more questions, but I just
> > want to make sure I'm
> > > not
> > > > being unrealistic in my expectations:
> > > >
> > > > - how fast does the S&H cell of the smooth /
> > stepped generator go?
> > > > I'd like to use it for aliasing effects, so I'd
> > need I guess up to
> > > a
> > > > couple of thousand Hz --- is that possible with
> > the internal clock
> > > of
> > > > that cell, or would it only work with an audio
> > rate oscillator
> > > plugged
> > > > into the "sample" jack? Or have I misunderstood
> > what the rate jack
> > > > and knobs do?
> > > >
> > > > - do you think there is any chance to persuade
> > Rex Probe to add a
> > > > couple of passive banana-to-mini-jack converters
> > to the central
> > > strip
> > > > of the M-boat? That would help a lot with
> > interfacing to other CV
> > > gear.
> > > >
> > > > Thanks for all your help! I'm really psyched
> > about this thing...
> > > >
> > > > -- KkoNkkrete
> > > >
> > > >
> > > > --- In SergeModular@yahoogroups.com, Carbon111
> > <carbon111@> wrote:
> > > > >
> > > > > Hi there,
> > > > >
> > > > > >Sorry if my previous post was a bit moronic!
> >
> > > > >
> > > > > Not at all, it was a perfectly valid question.
> > I just wanted to
> > > make
> > > > sure you didn't misunderstand me.
> > > > >
> > > > > >as for requesting mp3s --- I didn't mean to
> > suggest that lossy
> > > > > >compression could do justice to the sounds
> > --- I just wanted to
> > > get a
> > > > > >rough glimpse of the range that was possible,
> > given that I am in
> > > > > >Europe and may not have a chance to see one
> > in the flesh for a
> > > while.
> > > > >
> > > > > No problems there either. Its just that a
> > modular synthesizer
> > > > dosen't really sound like *anything* if you get
> > my meaning...its
> > > like
> > > > trying to show someone what a piano is like just
> > by hitting middle
> > > C ;)
> > > > >
> > > > > I'll try to put some wav files up in a few
> > days but people
> > > shouldn't
> > > > take them as *definitive* examples...everyone
> > will get *completely*
> > > > different sounds from this thing...
> > > > >
> > > > > >Sorry about all these basic questions, I'm
> > really excited about
> > > the
> > > > > >possibilities, but I just want to get things
> > clear before
> > > taking the
> > > > > >plunge...
> > > > >
> > > > > No problem at all. :)
> > > > >
> > > > > Best Regards, James
> > > > > --
> > > > > http://www.carbon111.com/serge_index.html
> > > > >
> > > >
> > >
> >
> >
> >
>
>
>
>
_______________
> Looking for last minute shopping deals?http://tools.search.yahoo.com/newsearch/category.php?
> Find them fast with Yahoo! Search.
category=shopping
>