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A180-9 multicore

A180-9 multicore

2017-12-30 by Jonathan

Hi everyone. Almost Happy (Christian) New Year. I bought myself a pair of the new multicore modules as a Xmas treat (how incredibly useful in a large system Dieter - amazing that no-one has thought of it before). I have a very odd problem - The modules link perfectly with the cables supplied but they are only very short. When I try any other network cables however nothing seems to connect. I have checked the cables by linking my laptop to the router and that works fine, but I get no connections at all when I use them between the A180-9s. One of them is 1m long and two are 3m. Any suggestions please?
Jonathan
From my iPad Air

Re: [Doepfer_a100] A180-9 multicore

2017-12-30 by Neil Kagan

Do they use a cat5e or cat6 cable? The connector will be the same. 

Neil

Sent from my iPhone
Show quoted textHide quoted text
> On 30 Dec 2017, at 09:53, Jonathan jss9h@aol.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> Hi everyone. Almost Happy (Christian) New Year. I bought myself a pair of the new multicore modules as a Xmas treat (how incredibly useful in a large system Dieter - amazing that no-one has thought of it before). I have a very odd problem - The modules link perfectly with the cables supplied but they are only very short. When I try any other network cables however nothing seems to connect. I have checked the cables by linking my laptop to the router and that works fine, but I get no connections at all when I use them between the A180-9s. One of them is 1m long and two are 3m. Any suggestions please?
> Jonathan
> From my iPad Air
>

Re: [Doepfer_a100] A180-9 multicore

2017-12-30 by Jacco Ville

Seems there are cross-cables also....
I’m not very familiar with CAT cables but when this module was introduced I took a small dive into this kind of connections because the provided cable is a bit short. 


Sent from my IPhone. 
Show quoted textHide quoted text
> Op 30 dec. 2017 om 11:31 heeft Neil Kagan nkagan@mac.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> het volgende geschreven:
> 
> Do they use a cat5e or cat6 cable? The connector will be the same. 
> 
> 
> Neil
> 
> Sent from my iPhone
> 
>> On 30 Dec 2017, at 09:53, Jonathan jss9h@aol.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>> 
>>  
>> Hi everyone. Almost Happy (Christian) New Year. I bought myself a pair of the new multicore modules as a Xmas treat (how incredibly useful in a large system Dieter - amazing that no-one has thought of it before). I have a very odd problem - The modules link perfectly with the cables supplied but they are only very short. When I try any other network cables however nothing seems to connect. I have checked the cables by linking my laptop to the router and that works fine, but I get no connections at all when I use them between the A180-9s. One of them is 1m long and two are 3m. Any suggestions please?
>> Jonathan
>> From my iPad Air
> 
>

Re: [Doepfer_a100] A180-9 multicore

2017-12-30 by Neil Kagan

Does that mean they’ve been wired to US or Euro standard? I’m no expert but we recent had a nightmare installing cctv at work and found the reason was the installers wired some com ports with the US standard so a couple of wires are reversed. 

Neil

Sent from my iPhone
Show quoted textHide quoted text
> On 30 Dec 2017, at 11:43, Jacco Ville jaccoville@yahoo.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> Seems there are cross-cables also....
> 
> I’m not very familiar with CAT cables but when this module was introduced I took a small dive into this kind of connections because the provided cable is a bit short. 
> 
> 
> Sent from my IPhone.. 
> 
>> Op 30 dec. 2017 om 11:31 heeft Neil Kagan nkagan@mac.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> het volgende geschreven:
>> 
>>  
>> Do they use a cat5e or cat6 cable? The connector will be the same. 
>> 
>> 
>> Neil
>> 
>> Sent from my iPhone
>> 
>>> On 30 Dec 2017, at 09:53, Jonathan jss9h@aol.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>>> 
>>>  
>>> Hi everyone. Almost Happy (Christian) New Year. I bought myself a pair of the new multicore modules as a Xmas treat (how incredibly useful in a large system Dieter - amazing that no-one has thought of it before). I have a very odd problem - The modules link perfectly with the cables supplied but they are only very short. When I try any other network cables however nothing seems to connect. I have checked the cables by linking my laptop to the router and that works fine, but I get no connections at all when I use them between the A180-9s. One of them is 1m long and two are 3m. Any suggestions please?
>>> Jonathan
>>> From my iPad Air
>> 
> 
>

Re: [Doepfer_a100] A180-9 multicore

2017-12-30 by Jonathan

Hi everyone. After a bit more research I have answered my own question. There are 8 cores in a cat 5 cable, and Dieter has used all of them in the module. That means there is no separate earth connection. I use nylon washers so my A180-9s were not earthed, consequently when I tested them in separate cases with an LED plug, nothing happened. When I removed one washer from each module so the panels were connected to earth via the mounting rail and other modules in the case, everything worked fine. Dieter, you may want to consider mentioning this in the product description so that other people are aware who are not in the Yahoo group. 
Best wishes to all.
Jonathan
From my iPad Air
Show quoted textHide quoted text
> On 30 Dec 2017, at 09:53, Jonathan jss9h@aol.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> Hi everyone. Almost Happy (Christian) New Year. I bought myself a pair of the new multicore modules as a Xmas treat (how incredibly useful in a large system Dieter - amazing that no-one has thought of it before). I have a very odd problem - The modules link perfectly with the cables supplied but they are only very short. When I try any other network cables however nothing seems to connect. I have checked the cables by linking my laptop to the router and that works fine, but I get no connections at all when I use them between the A180-9s. One of them is 1m long and two are 3m. Any suggestions please?
> Jonathan
> From my iPad Air
> 
> 
> ------------------------------------
> Posted by: Jonathan <jss9h@aol.com>
> ------------------------------------
> 
> 
> ------------------------------------
> 
> Yahoo Groups Links
> 
> 
>

Re: [Doepfer_a100] A180-9 multicore

2017-12-30 by Jonathan

Hi Neil
Thanks for your response. Please see my next posting as I have solved the problem - it was the nylon washers.
My understanding is that cat 5 and cat 6 cables are exactly the same electrically, just have slightly different impedances to accomodate higher network speeds for cat 6. At modular speeds there will be no effective difference.
Best wishes
Jonathan
From my iPad Air
Show quoted textHide quoted text
> On 30 Dec 2017, at 10:31, Neil Kagan nkagan@mac.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> 
> 
> Do they use a cat5e or cat6 cable? The connector will be the same. 
> 
> Neil
> 
> Sent from my iPhone
> 
>> On 30 Dec 2017, at 09:53, Jonathan jss9h@aol.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>> 
>> Hi everyone. Almost Happy (Christian) New Year. I bought myself a pair of the new multicore modules as a Xmas treat (how incredibly useful in a large system Dieter - amazing that no-one has thought of it before). I have a very odd problem - The modules link perfectly with the cables supplied but they are only very short. When I try any other network cables however nothing seems to connect. I have checked the cables by linking my laptop to the router and that works fine, but I get no connections at all when I use them between the A180-9s. One of them is 1m long and two are 3m. Any suggestions please?
>> Jonathan
>> From my iPad Air
> 
> 
>

Re: [Doepfer_a100] A180-9 multicore

2017-12-30 by Jonathan

I was not aware of that difference. It seems Dieter needs to put some warnings on the website about all these potential problems.

Jonathan
From my iPad Air
Show quoted textHide quoted text
> On 30 Dec 2017, at 12:08, Neil Kagan nkagan@mac.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> 
> 
> Does that mean they’ve been wired to US or Euro standard? I’m no expert but we recent had a nightmare installing cctv at work and found the reason was the installers wired some com ports with the US standard so a couple of wires are reversed. 
> 
> Neil
> 
> Sent from my iPhone
> 
>> On 30 Dec 2017, at 11:43, Jacco Ville jaccoville@yahoo.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>> 
>> Seems there are cross-cables also....
>> 
>> I’m not very familiar with CAT cables but when this module was introduced I took a small dive into this kind of connections because the provided cable is a bit short. 
>> 
>> 
>> Sent from my IPhone.. 
>> 
>>> Op 30 dec. 2017 om 11:31 heeft Neil Kagan nkagan@mac.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> het volgende geschreven:
>>> 
>>>  
>>> Do they use a cat5e or cat6 cable? The connector will be the same. 
>>> 
>>> 
>>> Neil
>>> 
>>> Sent from my iPhone
>>> 
>>>> On 30 Dec 2017, at 09:53, Jonathan jss9h@aol.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>>>> 
>>>>  
>>>> Hi everyone. Almost Happy (Christian) New Year. I bought myself a pair of the new multicore modules as a Xmas treat (how incredibly useful in a large system Dieter - amazing that no-one has thought of it before). I have a very odd problem - The modules link perfectly with the cables supplied but they are only very short. When I try any other network cables however nothing seems to connect. I have checked the cables by linking my laptop to the router and that works fine, but I get no connections at all when I use them between the A180-9s. One of them is 1m long and two are 3m. Any suggestions please?
>>>> Jonathan
>>>> From my iPad Air
>>> 
>> 
> 
> 
>

Re: [Doepfer_a100] A180-9 multicore

2017-12-30 by Neil Kagan

Nice work - that would have kept me confused for a lot longer!

Sent from my iPhone
Show quoted textHide quoted text
> On 30 Dec 2017, at 12:31, Jonathan jss9h@aol.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> Hi Neil
> 
> Thanks for your response. Please see my next posting as I have solved the problem - it was the nylon washers.
> My understanding is that cat 5 and cat 6 cables are exactly the same electrically, just have slightly different impedances to accomodate higher network speeds for cat 6. At modular speeds there will be no effective difference.
> Best wishes
> Jonathan
> From my iPad Air
> 
>> On 30 Dec 2017, at 10:31, Neil Kagan nkagan@mac.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>> 
>> Do they use a cat5e or cat6 cable? The connector will be the same. 
>> 
>> Neil
>> 
>> Sent from my iPhone
>> 
>>> On 30 Dec 2017, at 09:53, Jonathan jss9h@aol.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>>> 
>>>  
>>> Hi everyone. Almost Happy (Christian) New Year. I bought myself a pair of the new multicore modules as a Xmas treat (how incredibly useful in a large system Dieter - amazing that no-one has thought of it before). I have a very odd problem - The modules link perfectly with the cables supplied but they are only very short. When I try any other network cables however nothing seems to connect. I have checked the cables by linking my laptop to the router and that works fine, but I get no connections at all when I use them between the A180-9s. One of them is 1m long and two are 3m. Any suggestions please?
>>> Jonathan
>>> From my iPad Air
>> 
> 
>

Re: [Doepfer_a100] A180-9 multicore

2017-12-30 by Laurie

Not related to this issue, but will there be a problem because of the use of twisted pairs? Couldn't patching a 'noisy' signal in the same pair as, say, a 1V/Octave for a VCO, or with an audio signal lead to possible issues?.

Also surprised that as an inter-system connector, that it does not provide a common ground connection

Best Regards

Laurie Biddulph
Mobile.......: +61 0400 257 645
Phone.......: +61 02 4340 0938
Skype.......: widgetoz

ELBY Designs
9 Follan Close
Kariong
NSW 2250
Australia

ABN: 70 022 727 605

2017 - Year of the EuroSerge Rooster

Show quoted textHide quoted text
On 30/12/2017 10:43 PM, Jacco Ville jaccoville@yahoo.com [Doepfer_a100] wrote:
Seems there are cross-cables also....
I’m not very familiar with CAT cables but when this module was introduced I took a small dive into this kind of connections because the provided cable is a bit short.


Sent from my IPhone.

Op 30 dec. 2017 om 11:31 heeft Neil Kagan nkagan@mac.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> het volgende geschreven:

Do they use a cat5e or cat6 cable? The connector will be the same.


Neil

Sent from my iPhone

On 30 Dec 2017, at 09:53, Jonathan jss9h@aol.com [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:

Hi everyone. Almost Happy (Christian) New Year. I bought myself a pair of the new multicore modules as a Xmas treat (how incredibly useful in a large system Dieter - amazing that no-one has thought of it before). I have a very odd problem - The modules link perfectly with the cables supplied but they are only very short. When I try any other network cables however nothing seems to connect. I have checked the cables by linking my laptop to the router and that works fine, but I get no connections at all when I use them between the A180-9s. One of them is 1m long and two are 3m. Any suggestions please?
Jonathan
>From my iPad Air


Re: [Doepfer_a100] A180-9 multicore

2017-12-30 by John Hollis

The modules generally have a 1K output impedance so with short cable runs (say 3 meters) crosstalk should not be an issue.
Show quoted textHide quoted text
> On 30 Dec 2017, at 22:12, Laurie elby_designs@ozemail.com.au [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> Not related to this issue, but will there be a problem because of the use of twisted pairs? Couldn't patching a 'noisy' signal in the same pair as, say, a 1V/Octave for a VCO, or with an audio signal lead to possible issues?.
> 
> Also surprised that as an inter-system connector, that it does not provide a common ground connection
> 
> Best Regards
> 
> Laurie Biddulph
> Mobile.......: +61 0400 257 645
> Phone.......: +61 02 4340 0938
> Skype.......: widgetoz
> 
> <icon-www.jpg> <http://www.elby-designs.com/><icon-facebook.jpg> <https://www.facebook.com/euro.serge.modular/>
> ELBY Designs
> 9 Follan Close
> Kariong
> NSW 2250
> Australia
> 
> ABN: 70 022 727 605
> 
> <image-piano-chicken.jpg> <http://www.elby-designs.com/webtek/euro-serge/euro-serge.thm> 2017 - Year of the EuroSerge Rooster
> 
> On 30/12/2017 10:43 PM, Jacco Ville jaccoville@yahoo.com <mailto:jaccoville@yahoo.com> [Doepfer_a100] wrote:
>> Seems there are cross-cables also....
>> I’m not very familiar with CAT cables but when this module was introduced I took a small dive into this kind of connections because the provided cable is a bit short. 
>> 
>> 
>> Sent from my IPhone. 
>> 
>> Op 30 dec. 2017 om 11:31 heeft Neil Kagan nkagan@mac.com <mailto:nkagan@mac.com> [Doepfer_a100] <Doepfer_a100@yahoogroups.com <mailto:Doepfer_a100@yahoogroups.com>> het volgende geschreven:
>> 
>>>  
>>> Do they use a cat5e or cat6 cable? The connector will be the same. 
>>> 
>>> 
>>> Neil
>>> 
>>> Sent from my iPhone
>>> 
>>> On 30 Dec 2017, at 09:53, Jonathan jss9h@aol.com <mailto:jss9h@aol.com> [Doepfer_a100] <Doepfer_a100@yahoogroups.com <mailto:Doepfer_a100@yahoogroups.com>> wrote:
>>> 
>>>>  
>>>> Hi everyone. Almost Happy (Christian) New Year. I bought myself a pair of the new multicore modules as a Xmas treat (how incredibly useful in a large system Dieter - amazing that no-one has thought of it before). I have a very odd problem - The modules link perfectly with the cables supplied but they are only very short. When I try any other network cables however nothing seems to connect. I have checked the cables by linking my laptop to the router and that works fine, but I get no connections at all when I use them between the A180-9s. One of them is 1m long and two are 3m. Any suggestions please?
>>>> Jonathan
>>>> >From my iPad Air
>>>> 
>> 
> 
> 
>

Re: [Doepfer_a100] A180-9 multicore

2017-12-30 by james.husted@mac.com

I would modify it to have all the normalization on the separate jacks tied to ground so that any unused jacks would act as a ground connection and provide some shielding in the cable. If the jacks being used have a normalization connection that is floating now, it would be pretty easy yo connect them to the ground someway. 
-James

James Husted, Designer, Synthwerks LLC • www.synthwerks.com • james@synthwerks.com • info@synthwerks.com
Show quoted textHide quoted text
> On Dec 30, 2017, at 2:12 PM, Laurie elby_designs@ozemail.com.au [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
> 
> 
> 
> Not related to this issue, but will there be a problem because of the use of twisted pairs? Couldn't patching a 'noisy' signal in the same pair as, say, a 1V/Octave for a VCO, or with an audio signal lead to possible issues?.
> 
> Also surprised that as an inter-system connector, that it does not provide a common ground connection
> Best Regards
> 
> Laurie Biddulph
> Mobile.......: +61 0400 257 645
> Phone.......: +61 02 4340 0938
> Skype.......: widgetoz
> 
> <icon-www.jpg> <http://www.elby-designs.com/><icon-facebook.jpg> <https://www.facebook.com/euro.serge.modular/>

AW: [Doepfer_a100] A180-9 multicore

2018-01-02 by yahoo@doepfer.de

> Hi everyone. After a bit more research I have answered my own
> question. There are 8 cores in a cat 5 cable, and Dieter has used
> all of them in the module. That means there is no separate earth
> connection. I use nylon washers so my A180-9s were not earthed,
> consequently when I tested them in separate cases with an LED
> plug, nothing happened. When I removed one washer from each
> module so the panels were connected to earth via the mounting
> rail and other modules in the case, everything worked fine.
> Dieter, you may want to consider mentioning this in the product
> description so that other people are aware who are not in the
> Yahoo group.
> Best wishes to all.
> Jonathan

In the A-180-9 circuit the A-100 GND is connected to the shield of the RJ45
sockets. For all network cables we tried the connections were fine and even
GND was connected by means of the shield. To be on the safe side I measured
some cables I had available and for all cables the shield was connected. I
also cutted one of the cables and it contained 8 single wires plus the
shield.

Maybe there are cables on the market where the shield is not connected. This
could explain the behaviour you described.

I'll add the information on our website that cables have to be used where
the shield is connected.

We could also add longer cables (e.g. 1m) as the price is nearly the same as
for the 50cm cables. But a few live playing Eurorack users we asked
recommended the 50 cm cable because longer cables are unfavorable for the
typical connection of a base (e.g. A-100PB or A-100-PMB) and another case on
top (e.g. A-100P9 or A-100PMS9).

Best regards and A Happy New Year to all
Dieter Doepfer

AW: [Doepfer_a100] A180-9 multicore

2018-01-02 by yahoo@doepfer.de

We handed over a few prototypes of the A-180-9 to customers who use the
A-100 very intensively (live on stage and in the studio) before we started
the production to find out if there may occur any crosstalk or voltage loss
problems. Even worst-case scenarios were tested (e.g. 15V gate signals and
audio signals over a 2m cable) and none of the testers reported any
problems.

And the connection includes a common GND provided that network cables with
shield are used (see my other answer in this regard).

Best wishes
Dieter Doepfer
Show quoted textHide quoted text
> -----Ursprüngliche Nachricht-----
> Von: Doepfer_a100@yahoogroups.com [mailto:Doepfer_a100@yahoogroups.com]
> Gesendet: Samstag, 30. Dezember 2017 23:13
> An: Doepfer_a100@yahoogroups.com
> Betreff: Re: [Doepfer_a100] A180-9 multicore
>
>
>
>
> Not related to this issue, but will there be a problem because of
> the use of twisted pairs? Couldn't patching a 'noisy' signal in
> the same pair as, say, a 1V/Octave for a VCO, or with an audio
> signal lead to possible issues?.
>
> Also surprised that as an inter-system connector, that it does
> not provide a common ground connection
>
> Best Regards
>
> Laurie Biddulph
> Mobile.......: +61 0400 257 645
> Phone.......: +61 02 4340 0938
> Skype.......: widgetoz
>
>
> ELBY Designs
> 9 Follan Close
> Kariong
> NSW 2250
> Australia
> ABN: 70 022 727 605
>  2017 - Year of the EuroSerge Rooster
>
> On 30/12/2017 10:43 PM, Jacco Ville jaccoville@yahoo.com
> [Doepfer_a100] wrote:
>
> Seems there are cross-cables also....
> I’m not very familiar with CAT cables but when this module was
> introduced I took a small dive into this kind of connections
> because the provided cable is a bit short.
>
>
>
> Sent from my IPhone.
>
> Op 30 dec. 2017 om 11:31 heeft Neil Kagan nkagan@mac.com
> [Doepfer_a100] <Doepfer_a100@yahoogroups.com> het volgende geschreven:
>
>
>
> Do they use a cat5e or cat6 cable? The connector will be the same.
>
>
> Neil
>
>
> Sent from my iPhone
>
> On 30 Dec 2017, at 09:53, Jonathan jss9h@aol.com [Doepfer_a100]
> <Doepfer_a100@yahoogroups.com> wrote:
>
>
>
> Hi everyone. Almost Happy (Christian) New Year. I bought myself a
> pair of the new multicore modules as a Xmas treat (how incredibly
> useful in a large system Dieter - amazing that no-one has thought
> of it before). I have a very odd problem - The modules link
> perfectly with the cables supplied but they are only very short.
> When I try any other network cables however nothing seems to
> connect. I have checked the cables by linking my laptop to the
> router and that works fine, but I get no connections at all when
> I use them between the A180-9s. One of them is 1m long and two
> are 3m. Any suggestions please?
> Jonathan
> >From my iPad Air
>
>
>
>
>
>

Re: AW: [Doepfer_a100] A180-9 multicore

2018-01-02 by JS Home

Thanks Dieter. The cables I have are all fairly old so maybe they do not have the shield connected.

Jonathan Shapero
Sent from my iPhone
Show quoted textHide quoted text
On 2 Jan 2018, at 08:22, yahoo@doepfer.de [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:

>> Hi everyone. After a bit more research I have answered my own
>> question. There are 8 cores in a cat 5 cable, and Dieter has used
>> all of them in the module. That means there is no separate earth
>> connection. I use nylon washers so my A180-9s were not earthed,
>> consequently when I tested them in separate cases with an LED
>> plug, nothing happened. When I removed one washer from each
>> module so the panels were connected to earth via the mounting
>> rail and other modules in the case, everything worked fine.
>> Dieter, you may want to consider mentioning this in the product
>> description so that other people are aware who are not in the
>> Yahoo group.
>> Best wishes to all.
>> Jonathan
> 
> In the A-180-9 circuit the A-100 GND is connected to the shield of the RJ45
> sockets. For all network cables we tried the connections were fine and even
> GND was connected by means of the shield. To be on the safe side I measured
> some cables I had available and for all cables the shield was connected. I
> also cutted one of the cables and it contained 8 single wires plus the
> shield.
> 
> Maybe there are cables on the market where the shield is not connected. This
> could explain the behaviour you described.
> 
> I'll add the information on our website that cables have to be used where
> the shield is connected.
> 
> We could also add longer cables (e.g. 1m) as the price is nearly the same as
> for the 50cm cables. But a few live playing Eurorack users we asked
> recommended the 50 cm cable because longer cables are unfavorable for the
> typical connection of a base (e.g. A-100PB or A-100-PMB) and another case on
> top (e.g. A-100P9 or A-100PMS9).
> 
> Best regards and A Happy New Year to all
> Dieter Doepfer
> 
> 
> 
> 
> 
> 
> 
> ------------------------------------
> Posted by: <yahoo@doepfer.de>
> ------------------------------------
> 
> 
> ------------------------------------
> 
> Yahoo Groups Links
> 
> 
>

Re: AW: [Doepfer_a100] A180-9 multicore

2018-01-02 by Martin Klang

Most network cabling is UTP (Unshielded Twisted Pair), Shielded Twisted 
Pair (STP) is not very common.

STP Cat6 (or Cat5e) is sometimes used in datacenters but I've not seen 
it elsewhere.

Shielded RJ45 connectors have a metal cage, making it easy to recognise:

https://rubimages-liberty.netdna-ssl.com/hi-res/RJ45-STP-L5E_connector_45degree.png


Martin
Show quoted textHide quoted text
On 02/01/18 10:25, JS Home jss9h@aol.com [Doepfer_a100] wrote:
> Thanks Dieter. The cables I have are all fairly old so maybe they do not have the shield connected.
>
> Jonathan Shapero
> Sent from my iPhone
>
> On 2 Jan 2018, at 08:22, yahoo@doepfer.de [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
>
>>> Hi everyone. After a bit more research I have answered my own
>>> question. There are 8 cores in a cat 5 cable, and Dieter has used
>>> all of them in the module. That means there is no separate earth
>>> connection. I use nylon washers so my A180-9s were not earthed,
>>> consequently when I tested them in separate cases with an LED
>>> plug, nothing happened. When I removed one washer from each
>>> module so the panels were connected to earth via the mounting
>>> rail and other modules in the case, everything worked fine.
>>> Dieter, you may want to consider mentioning this in the product
>>> description so that other people are aware who are not in the
>>> Yahoo group.
>>> Best wishes to all.
>>> Jonathan
>> In the A-180-9 circuit the A-100 GND is connected to the shield of the RJ45
>> sockets. For all network cables we tried the connections were fine and even
>> GND was connected by means of the shield. To be on the safe side I measured
>> some cables I had available and for all cables the shield was connected. I
>> also cutted one of the cables and it contained 8 single wires plus the
>> shield.
>>
>> Maybe there are cables on the market where the shield is not connected. This
>> could explain the behaviour you described.
>>
>> I'll add the information on our website that cables have to be used where
>> the shield is connected.
>>
>> We could also add longer cables (e.g. 1m) as the price is nearly the same as
>> for the 50cm cables. But a few live playing Eurorack users we asked
>> recommended the 50 cm cable because longer cables are unfavorable for the
>> typical connection of a base (e.g. A-100PB or A-100-PMB) and another case on
>> top (e.g. A-100P9 or A-100PMS9).
>>
>> Best regards and A Happy New Year to all
>> Dieter Doepfer
>>
>>
>>
>>
>>
>>
>>
>> ------------------------------------
>> Posted by: <yahoo@doepfer.de>
>> ------------------------------------
>>
>>
>> ------------------------------------
>>
>> Yahoo Groups Links
>>
>>
>>
>
>
> ------------------------------------
> Posted by: JS Home <jss9h@aol.com>
> ------------------------------------
>
>
> ------------------------------------
>
> Yahoo Groups Links
>
>
>
>

AW: AW: [Doepfer_a100] A180-9 multicore

2018-01-02 by yahoo@doepfer.de

> Most network cabling is UTP (Unshielded Twisted Pair), Shielded Twisted
> Pair (STP) is not very common.
>
> STP Cat6 (or Cat5e) is sometimes used in datacenters but I've not seen
> it elsewhere.
>
> Shielded RJ45 connectors have a metal cage, making it easy to recognise:
>
>
https://rubimages-liberty.netdna-ssl.com/hi-res/RJ45-STP-L5E_connector_45deg
ree.png
>
> Martin

Thank's for the note.

I took a look at Wikipedia to learn a bit more about these cables. According
to Wikipedia it's a bit more complicate and several types of these cables
are available. One has to distingish between the common shield for all wires
and the shields for each pair. The shield can be a metal foil (abbreviation
F) or mesh wire (abbreviation S) or unshielded (abbreviation U). The
character before the "/" identifies the type of common shield, the first
character after the "/" identifies the type shield for the pairs of wires,
e.g.

U/UTP: totally unshielded (not suitable for A-180-9)

S/UTP: common shield for all wires (mesh wire)
U/FTP: separate shield (foil) for each pair, no common shield
S/FTP: separate shield (foil) for each pair and common shield (mesh wire)
F/FTP: separate shield (foil) for each pair and common shield (foil)

All network cables I could find here in Germany (CAT5 or CAT6) had a common
shield. That's why was not aware that unshielded cables are available at
all.

For the A-180-9 all cables with common shield are suitable (i.e. S/UTP,
S/FTP, F/FTP and SF/FTP). Only U/UTP is not suitable for A-180-9. I'm not
sure if U/FTP will work as it depends upon if and how the single shields are
wired to the connectors.

Best whishes
Dieter Doepfer

Re: AW: AW: [Doepfer_a100] A180-9 multicore

2018-01-02 by JS Home

Thanks Dieter (and Wikipedia) for that really helpful summary. I will check my cables tonight when I get home as I think they usually have printing on the insulation which will probably tell me what they are
Best wishes

Jonathan Shapero
Sent from my iPhone
Show quoted textHide quoted text
On 2 Jan 2018, at 15:26, yahoo@doepfer.de [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:

>> Most network cabling is UTP (Unshielded Twisted Pair), Shielded Twisted
>> Pair (STP) is not very common.
>> 
>> STP Cat6 (or Cat5e) is sometimes used in datacenters but I've not seen
>> it elsewhere.
>> 
>> Shielded RJ45 connectors have a metal cage, making it easy to recognise:
>> 
>> 
> https://rubimages-liberty.netdna-ssl.com/hi-res/RJ45-STP-L5E_connector_45deg
> ree.png
>> 
>> Martin
> 
> Thank's for the note.
> 
> I took a look at Wikipedia to learn a bit more about these cables. According
> to Wikipedia it's a bit more complicate and several types of these cables
> are available. One has to distingish between the common shield for all wires
> and the shields for each pair. The shield can be a metal foil (abbreviation
> F) or mesh wire (abbreviation S) or unshielded (abbreviation U). The
> character before the "/" identifies the type of common shield, the first
> character after the "/" identifies the type shield for the pairs of wires,
> e.g.
> 
> U/UTP: totally unshielded (not suitable for A-180-9)
> 
> S/UTP: common shield for all wires (mesh wire)
> U/FTP: separate shield (foil) for each pair, no common shield
> S/FTP: separate shield (foil) for each pair and common shield (mesh wire)
> F/FTP: separate shield (foil) for each pair and common shield (foil)
> 
> All network cables I could find here in Germany (CAT5 or CAT6) had a common
> shield. That's why was not aware that unshielded cables are available at
> all.
> 
> For the A-180-9 all cables with common shield are suitable (i.e. S/UTP,
> S/FTP, F/FTP and SF/FTP). Only U/UTP is not suitable for A-180-9. I'm not
> sure if U/FTP will work as it depends upon if and how the single shields are
> wired to the connectors.
> 
> Best whishes
> Dieter Doepfer
> 
> 
> 
> ------------------------------------
> 
> ------------------------------------
> 
> 
> ------------------------------------
> 
> Yahoo Groups Links
> 
> 
>

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