[HAM] Chopping Hammonds - Ribbon

[J Wacek]

 Steve,

We used that kind of ribbon cable in computer cabinet interconnects. In that
application the cable pairs were driven by differential op amps. You guys
did a great job with the mounting hardware. The challenge I see is mounting
RJ45 jacks in a somewhat neat fashion. I have access to some 50 pin telco
jacks, but I can see crosstalk problems using that.

Jim

-----Original Message-----
From: hammond-bounces at zeni.net [mailto:hammond-bounces at zeni.net] On Behalf
Of Steve Leigh
Sent: Wednesday, May 02, 2007 8:49 PM
To: The Hammond Forum
Subject: Re: [HAM] Chopping Hammonds - Ribbon

And now out with the secret.  <g>

Much later - after spending so much time with the ribbon cables - I learned
some interesting facts.

The twisted pair cable I used was designed to eliminate crosstalk - but NOT
in the audio range.  It was made for SCSI drives!  Hammonds have about a
7kHz "top" ..... which doesn't even approach what this ribbon cable was
designed to suppress.

2nd big discovery: wire diameter and jacketing size.  Each conductor was so
thin, and the insulation so light, it was ridiculous - in comparison to a
standard Hammond wiring harness.  I'm too lazy to put a micrometer on one
now, but the ribbon I had was ultra tiny gauge.

The connector mounts all came out beautifully, it was the ribbon cable that
didn't live up to our expectations.




Steve Leigh  :::  steve at sl-prokeys.com
<http://sl-prokeys.com/>The ProKeys<http://sl-prokeys.com/> 
website  :::  click link
<http://sl-prokeys.com/stax/stax-story.htm>The 
STAX<http://sl-prokeys.com/stax/stax-story.htm> pages  :::  click link



                      
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