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I'm trying to make my star wiring as equal length as practicable, but it may come out that the hot is 2 feet longer than the common. How much will this affect the DCS signal. I know they say "equal", but how equal is equal?

 

This is due to the additional length as the hot lines lead through the toggles blocks controlling the insulated blocks (I still want to use cab control which necessitates having the toggles. If I have to, I can strip the twisted pair back far enough to expose enough black wire to add up to the additional length needed to make them equal... But I don't want to.

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You're right. I pulled that illustration off a google search. Let me find another one. The end of the wire on the right side is coming from the wrong direction. It's like one of the those Escher drawings where the stairways go around and around and end in the wrong place.

 

Western-Union-splice-342x350

 

I think you'll find the geometry on this one correct. That was a good pickup.

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Gee Trainman, in another post you said you believe that things CAN BE overbuilt in the model train world. You must not view this whole spice thing as an overbuild? Much like my 2x4 benchwork being built like a house/deck (over built), your wiring splice is not going on the space shuttle (a bit overkill for model railroading)     

Trainman, you too?  I was taught that splice was called a telephone splice and use it everywhere. Never had one fail yet, 38 years and counting.

Lots of folks say I'm overdoing it but like you say, beats troubleshooting a bad connection.

USAF High reliability wiring, F-15 Integrated Avionic Attack Control Systems

NASA Spacecraft wiring certified (Langley NASA, helped build the Cryogenic wind tunnel to test the Space Shuttle Design.

Back to F-15's for a career ending with the FB-111A Raven through Desert Storm and beyond.

Now designing Electronic Controls for Industrial Applications.

Still never had one of those splices fail.

Most of the planes I worked on are now retired to Davis Monthan.

 

Oh ya, a couple feet between Hot and common should not be a problem.

The speed of a signal over copper wire is insanely fast.

Thanks for the vote of confidence. You can look at the graveyard on Google Earth. It's utterly ridiculous that we've mothballed more aircraft than most countries have owned in their entire history. You see everything there. You also get a little squeamish to think about how many billions we've spent as a people building and flying them. On the flipside, building aerospace stuff is very satisfying work that brings out the best creativity in our population.

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