Re: Making snake with D-sub connectors


Mike Rivers wrote:

> No, but it increases the risk of a ground loop. It's not a big deal if
> everything is coming from the same box and going to the same box - like
> an 8-channel mic preamp connected to eight inputs of a recorder. But
> for patching things here and there, separating the grounds is the best
> policy for avoiding ground problems. At least when you do that, if you
> encounter a problem, you may be able to resolve it by removing one
> ground connection.

Ok, well said. I think that almost sums up this whole thread.

Your experience with crimping sounds alot like mine. I actually
assembled two and half snakes with more than a little trepidation and
not much confidence in it's integrity until I figured it out. I was
stripping too much insulation and the crimp that binds the insulation
wasn't lining up correctly. Once I figured this out, the crimps look
and feel like factory produced.

All my parts and tools are from AMP and are designed to work together.
I should mention that it took me several days of researching their site
to figure this stuff out since I had zero experience with D-subs.

This crimper is pretty serious. I have a hard time imagining being able
to produce consistent crimps without it, and it's hard to imagine
anything from Radio Shack being built like it. It holds the pin in
place in the die so you have a hand free to insert the wire. The pins
have two pairs of crimping flaps- one for the bare wire, and one to
secure the wire at the insulation. There's a back plate on the tool
that stops the wire so it lines up perfectly with the wire crimping
flaps. The only catch, as I already mentioned, is that you have to
strip just the right amount of insulation for the insulation crimping
flaps to hit it right. To solve this problem, we fashioned a tiny piece
of wood from a cloths pin and used double-sided tape to secure it to
the stripper as an extended stop block. The movable stop block already
built into the stripper wouldn't move close enough to allow strips
short enough.

I would never recommend this to anyone whose time is worth more than
about $7/hour. If I could start over, I would just buy them. I don't
regret it though. It was worth it if for no other reason than to
satisfy my curiousity. Now I know.

.

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