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Comment: Re:Use the Coax as a wirepull for the cat5 (Score 1) 608

by driftingwalrus (#31187850) Attached to: Suggestions For a Coax-To-Ethernet Solution?

I didn't notice the line showing the threading. I still have my doubts about using the two cables as a 100 ohm differential connection. You're talking about using them as a balanced transmission line, I'd be worried about crosstalk between the shields of adjacent cables.

Comment: Re:Use the Coax to pull CAT 5e cable (Score 1) 608

by driftingwalrus (#31187764) Attached to: Suggestions For a Coax-To-Ethernet Solution?

It's not theoretically possible, I'm sorry. The characteristics of the coax are completely and totally wrong. This get complicated when you're dealing with high-frequency digital and analog signals. The capacitance is wrong, the impedance is wrong... It's just wrong, wrong wrong.

Comment: Re:Twisted pair, man (Score 1) 608

by driftingwalrus (#31187710) Attached to: Suggestions For a Coax-To-Ethernet Solution?

My mind has been boggling at how bad an idea his plan is. The conductor and shield in coax have capacitance between them, it's an unbalanced transmission line. There'd be noise and cross talk and impedance mismatches causing reflections.... It's like running the poor signal through a meat grinder.

Comment: Re:Use the Coax as a wirepull for the cat5 (Score 1, Informative) 608

by driftingwalrus (#31187666) Attached to: Suggestions For a Coax-To-Ethernet Solution?

It won't, no way, no how. The capacitance of the coax cable will screw the whole thing up. You'll get relfections and crosstalk *everywhere*. What you need is an old fashioned 10Base2 card designed for coax, you need terminators and you need to make sure the cable is of the right impedance.

Comment: Expensive Lock, Cheap Casing (Score 1) 252

by driftingwalrus (#30660464) Attached to: Encryption Cracked On NIST-Certified Flash Drives

This is like having a bank vault, and investing thousands in an expensive lock - then placing that lock on the outside of the vault in a tin box. All they have to do is smash off the box and turn the knob behind it. There's a word for this: incompetence. I'm not sure why companies still put up with this kind of stupidity. Seriously, if a doctor pulled this kind of stunt he'd lose his license.

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