Doepfer

I have an ever-growing and ever-re-arranging set of 3 portable cases.  
In one I have a A-190 and plan on adding some Bus-access A-185-1/2  
modules and A-164-1 manual gate modules to it and to the other cases.  
I know there is a problem and potential danger with having the  
A-185s, A-164-1, and the A-190 in the same cabinet (if the busses are  
connected) without removing internal jumpers on A-190. What other  
modules should I have the same concerns about? Also will the A-190  
drive multiple VCO's like the A-185s will? I may have damaged my 190  
already by temporarily having it on the same buss as my new A-164-1  
module (I have to start reading the manuals before turning them on!).  
The A-190 seems not to send gates to the A-141 on the same buss but I  
have to pull some modules to get a better look inside. Basically I'm  
sort of lazy and it would be nice to get a list of modules that send  
or receive CV and Gates to and from the buss that could possibly  
damage each other. I'm trying to avoid having to look through all the  
PDF manuals.

-James

hello James,

the A141, normaly, does NOT receive gate singals from the buss.

best regards,
Bakis.




Bakis Sirros - Parallel Worlds / Interconnected / Memory Geist
[Doepfer_a100] group owner
www. parallel - worlds - music. com
www. myspace. com/ parallelworldsmusic
www. myspace. com/ interconnectedmusic
www. myspace. com/ memorygeist
www. DiN. org. uk
www. musicamaximamagnetica. com
www. shimarecords. co. uk
www. rubberrecords. gr
Athens - Greece


--- On Thu, 6/26/08, James Husted <the_ersatz_planet@mac.com> wrote:

> From: James Husted <the_ersatz_planet@mac.com>
> Subject: [Doepfer_a100] dangerous module combinations on the buss...
> To: Doepfer_a100@yahoogroups.com
> Date: Thursday, June 26, 2008, 11:24 PM
> I have an ever-growing and ever-re-arranging set of 3
> portable cases.  
> In one I have a A-190 and plan on adding some Bus-access
> A-185-1/2  
> modules and A-164-1 manual gate modules to it and to the
> other cases.  
> I know there is a problem and potential danger with having
> the  
> A-185s, A-164-1, and the A-190 in the same cabinet (if the
> busses are  
> connected) without removing internal jumpers on A-190. What
> other  
> modules should I have the same concerns about? Also will
> the A-190  
> drive multiple VCO's like the A-185s will? I may have
> damaged my 190  
> already by temporarily having it on the same buss as my new
> A-164-1  
> module (I have to start reading the manuals before turning
> them on!).  
> The A-190 seems not to send gates to the A-141 on the same
> buss but I  
> have to pull some modules to get a better look inside.
> Basically I'm  
> sort of lazy and it would be nice to get a list of modules
> that send  
> or receive CV and Gates to and from the buss that could
> possibly  
> damage each other. I'm trying to avoid having to look
> through all the  
> PDF manuals.
> 
> -James

On Jun 26, 2008, at 1:28 PM, Bakis Sirros wrote:

> hello James,
>
> the A141, normaly, does NOT receive gate singals from the buss.
>

In a way that is a good thing to hear - at least my A-141 is not  
broken. I guess I was missled by the A-190's owner manual (page 4):

The gate output (5) and CV1 output (c) are automatically
connected to the system bus of the A-100, so
don’t use patch cables to connect these, unless you
have cut the links, or wish to connect to a module
whose system bus isn’t connected with the A-190’s
(have a look at the note on using more than one
A-190). VCOs on the same system bus automatically
receive CV1, and ADSRs automatically receive
the gate signal.

I wonder why the A-141 was left out of this? I guess I will be  
swapping some modules around again! I guess the need of a list that  
notes which modules talk and listen to the Buss is needed more than I  
thought.

-James

> I have an ever-growing and ever-re-arranging set of 3 portable cases.
> In one I have a A-190 and plan on adding some Bus-access A-185-1/2
> modules and A-164-1 manual gate modules to it and to the other cases.
> I know there is a problem and potential danger with having the
> A-185s, A-164-1, and the A-190 in the same cabinet (if the busses are
> connected) without removing internal jumpers on A-190. What other
> modules should I have the same concerns about? Also will the A-190
> drive multiple VCO's like the A-185s will? I may have damaged my 190
> already by temporarily having it on the same buss as my new A-164-1
> module (I have to start reading the manuals before turning them on!).
> The A-190 seems not to send gates to the A-141 on the same buss but I
> have to pull some modules to get a better look inside. Basically I'm
> sort of lazy and it would be nice to get a list of modules that send
> or receive CV and Gates to and from the buss that could possibly
> damage each other. I'm trying to avoid having to look through all the
> PDF manuals.
>
> -James


Here is the list

1. CV/Gate transmitters

A-164-1: gate (can be turned on/off via jumper)
A-185-1: gate and CV (can be turned on/off separately via jumpers)
A-185-2: CV (can be turned on/off via jumpers)
A-190  : gate and CV (can be interrupted separately by cutting wire jumpers)

2. CV/Gate receivers

A-110  : CV (can be turned on/off via jumper, normalled to jack socket CV1)
A-111  : CV (can be turned on/off via jumper, added to the pitch, i.e. not
normalled to socket CV1)
A-140  : gate (can be turned on/off via jumper, normalled to gate socket)

Remarks:
1. Do not connect two CV transmitters or two gate transmitters to the same
bus ! This causes a short circuit that may damage the transmitter modules as
these are not equipped with protection resistors at the outputs (like other
A-100 modules).
1. If more than two VCOs are driven by the same source (e.g. A-190, A-170) a
CV buffer is recommended (A-185-1 or A-185-2). For gate signals this is not
necessary.
2. The gate and CV bus can be interrupted in the middle of each bus board by
two jumpers to obtain different bus groups
3. If the CV and/or gate of different bus boards have to be connected (e.g.
if the A-190 and A-140 are located at different bus boards) a special
CV/gate connection cable is available (order no. A-100BC)

It is possible to connect each module to the bus CV or bus gate (if
meaningful) even later. The procedure is described on the A-100 DIY page:
"subsequent bus normalling of modules"

I know that the bus connection features of the modules is a bit inconsequent
(e.g. the missing gate connection for the A-141). But I ask for your
understanding as the modules were developed over a time span of more than 12
years by different developers. With the subsequent bus normalling of modules
each module can be connected to the bus if desired. We do these
modifications upon request even in the factory.

I'll add this information as a separate document to our website.

Best wishes
Dieter Doepfer

>
> Here is the list
>
> 'snip"

> It is possible to connect each module to the bus CV or bus gate (if
> meaningful) even later. The procedure is described on the A-100 DIY  
> page:
> "subsequent bus normalling of modules"
>
> I know that the bus connection features of the modules is a bit  
> inconsequent
> (e.g. the missing gate connection for the A-141). But I ask for your
> understanding as the modules were developed over a time span of  
> more than 12
> years by different developers. With the subsequent bus normalling  
> of modules
> each module can be connected to the bus if desired. We do these
> modifications upon request even in the factory.
>

Thank you Dieter! This is very helpful, I fully understand the  
evolution of the product line and have no problems, the consistency  
of the module build quality and functionality over the 12 years is  
something to be very proud of. I haven't read the "subsequent bus  
normalling of modules" page yet but I imagine that to make my A-140  
work on the buss it is as simple as jumping a lead from the  
normalizing connection on the gate in jack to the correct pin on the  
ribbon cable header connection. I would love to have more than one  
gate transmitter on a buss (the A-190 and a A-161-1 for example). Is  
it as simple as replacing the wire jumper with a resistor. If not, I  
guess a A-186-1 or  A-166 is in my future rig. Thanks for the Info. I  
would love this to end up being a page on the site - getting updated  
with new modules as developed (I would bet it is there already by the  
time you get this message!)

Thanks again-
James

"1. If more than two VCOs are driven by the same source (e.g. A-190, A-170) a
CV buffer is recommended (A-185-1 or A-185-2). "
   
  Does this apply only to the bus connection?  Or does it apply to a combination of bus and jack connections as well?  In other words are there tuning issues when running one Oscillator from the A-190 off the bus and running another Oscillator from that A-190 that is not connected to the same bus but is connected by cable?
   
  Ross Stapf
  Cedar Hill Texas
                           



[Non-text portions of this message have been removed]

On Jun 27, 2008, at 8:02 AM, James Husted wrote:
>  I would love to have more than one
> gate transmitter on a buss (the A-190 and a A-161-1 for example). Is
> it as simple as replacing the wire jumper with a resistor. If not, I
> guess a A-186-1 or  A-166 is in my future rig. Thanks for the Info.
> Thanks again-
> James
>

I have just looked at the DIY pages and see that replacing the gate  
jumper with a diode/resistor combination - duplicating the "Or-Wired  
Sockets" circuit shown - would do the trick to combine gates  
transmitters on the same bus. I should have sought out this page  
first. This is why I love analogue - a person who can handle a  
soldering iron can do allot. I can say I'm a very knowledgeable power- 
computer user but I sure can't modify a soft synth!

-James

>    "1. If more than two VCOs are driven by the same source (e.g.
> A-190, A-170) a
> CV buffer is recommended (A-185-1 or A-185-2). "
>
>   Does this apply only to the bus connection?  Or does it apply
> to a combination of bus and jack connections as well?  In other
> words are there tuning issues when running one Oscillator from
> the A-190 off the bus and running another Oscillator from that
> A-190 that is not connected to the same bus but is connected by cable?
>
>   Ross Stapf
>   Cedar Hill Texas

This applies to all kind of connections no matter if they are established
via patch cables or the bus.
For example: if you have two A-110 or A-111 sitting on the same bus as the
A-190 and you patch a third A-110 to the CV output of the A-190 you have 3
VCOs. In this case this connection is recommended:

A-190 -> A-185-1 (or A-185-2)
A-185-1/2 -> bus (to the two VCOs sitting on the bus) and to the third VCO
(via patch cable at the front)

Attention: The default connection between the A-190 CV and the bus has to be
interrupted in this case as you would generate a short circuit between the
CV outs of the A-190 and the A-185-1/2. Only if the A-190 and the A-185-1/2
are on different bus boards it is not necessary to interrupt the A-190 CV.

Best wishes
Dieter Doepfer

I just had a fuse go out on my A100 NT12 power supply.  Is this a standard type fuse that I can easily find at Radio Shack or is this a specialized type that I'll need to order?

Ross Stapf
Cedar Hill TX


[Non-text portions of this message have been removed]

> I just had a fuse go out on my A100 NT12 power supply.  Is this a
> standard type fuse that I can easily find at Radio Shack or is
> this a specialized type that I'll need to order?
>
> Ross Stapf
> Cedar Hill TX

Please look at our website to the FAQ page: www.doepfer.com > FAQ > A-100 >
values for A-100 fuses

Best wishes
Dieter Doepfer