I need to make up several different connectors for audio I/O for an
Apogee Rosetta 800. This will require 8 balanced connections to a db-25
connector. Some will be terminated with XLR's, some TRS.

Some channels will have longer runs than others on the same db-25, so
I'm thinking of 8 separate 2 conductor shielded cables (they must all
fit into the db25 strain relief) as opposed to a multi-conductor
solution.

Any suggestions for cable type and supplier?

Thanks,
Phil

--
Phil Oliver
Aardvark Graphics & Sound
remove _removespam for email replies

In article aardvarkgraphics_removespam-D4F1AC.13 writes:

I need to make up several different connectors for audio I/O for an
Apogee Rosetta 800. This will require 8 balanced connections to a db-25
connector. Some will be terminated with XLR's, some TRS.

Some channels will have longer runs than others on the same db-25, so
I'm thinking of 8 separate 2 conductor shielded cables (they must all
fit into the db25 strain relief) as opposed to a multi-conductor
solution.

I can't tell you what's best, but I can tell you what I used that
works. I've made up a few D-sub AES/EBU cables using Gepco 72401EZ.
It's 24 gauge, foil shield with a drain wire, and cheap as dirt. It's
not digital, it's not 110 ohms (or at least they don't claim it to be)
but I haven't heard any problems with it. Longest cable was about 20
feet, and I don't do 96 kHz.

There are some D-sub back shells that have bigger holes than others.
Keep that in mind when you're buying your parts. I don't know what
kind I have, just picked them out of the bin at the parts distributor
saying to myself "looks like that hole should be big enough" and it
was. But I have some that won't take 8 pieces of that Gepco cable.




--
I'm really Mike Rivers )
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me he double-m-eleven-double-zero at yahoo

Thanks Mike. I'll check it out.

Phil



In article znr1110919821k@trad, (Mike Rivers)
wrote:

I can't tell you what's best, but I can tell you what I used that
works. I've made up a few D-sub AES/EBU cables using Gepco 72401EZ.
It's 24 gauge, foil shield with a drain wire, and cheap as dirt. It's
not digital, it's not 110 ohms (or at least they don't claim it to be)
but I haven't heard any problems with it. Longest cable was about 20
feet, and I don't do 96 kHz.

There are some D-sub back shells that have bigger holes than others.
Keep that in mind when you're buying your parts. I don't know what
kind I have, just picked them out of the bin at the parts distributor
saying to myself "looks like that hole should be big enough" and it
was. But I have some that won't take 8 pieces of that Gepco cable.




--
I'm really Mike Rivers )
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me he double-m-eleven-double-zero at yahoo

--
Phil Oliver
Aardvark Graphics & Sound
remove _removespam for email replies

Phil Oliver wrote:
I need to make up several different connectors for audio I/O for an
Apogee Rosetta 800. This will require 8 balanced connections to a db-25
connector. Some will be terminated with XLR's, some TRS.

Some channels will have longer runs than others on the same db-25, so
I'm thinking of 8 separate 2 conductor shielded cables (they must all
fit into the db25 strain relief) as opposed to a multi-conductor
solution.

Any suggestions for cable type and supplier?

Rapco makes a miniature foil-shielded cable that is a lot more flexible
than the usual Belden miniature foil stuff. It's probably easier to
terminate than anything else out there.

Personally I am very partial to Belden 1804A, which is a miniature star
quad cable intended for things like lavalier mikes. It sounds good and
has excellent rejection, and it's not expensive. But, because it is
braid-shielded, it's a lot harder to terminate especially into the DB-25s
because you have to make a pigtail and put heat shrink on it.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

In article writes:

Personally I am very partial to Belden 1804A, which is a miniature star
quad cable intended for things like lavalier mikes.

Would it make any sense to use star-quad cable to carry AES/EBU
digital audio? I thought that's what we were talking about here, but
maybe I read too much into the original message.

--
I'm really Mike Rivers )
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me he double-m-eleven-double-zero at yahoo

In article znr1111008846k@trad, Mike Rivers wrote:
In article writes:

Personally I am very partial to Belden 1804A, which is a miniature star
quad cable intended for things like lavalier mikes.

Would it make any sense to use star-quad cable to carry AES/EBU
digital audio? I thought that's what we were talking about here, but
maybe I read too much into the original message.

No, it wouldn't make any sense at all. I gathered he was talking about
analogue audio into and out of converters, a la DA-88. The star quad stuff
just plain won't work for AES/EBU since it's not even close to 110 ohms.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."