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Discussion Starter #1 (Edited)
Every once in a while we run small singal wires through our cars for various purposes. A great example I can think of is radio faceplate relocation.

When I install gear, I try to put disconnects at every "bulkhead" in the car for ease of servicing. Using the radio faceplate example, if the ribbon cable extending the face were soldered to the radio, you would have to deinstall the entire cable run through who knows where just to pull out the radio!

one can say the same thing if its soldered to the faceplate rather than the radio chassis.

AND on top of that, if one wants to leave the gear in perfect condition for restoration later, that means utilizing the existing connectors.

the big issue with this is the excessive number of solder joints that must be made. What a pain!



I recently took on a signals project (also faceplate relocation) and counted the number of wires used in the ribbon cable. Total of 46 connectors! That means to tap the existing connectors on the chassis thats 46 solder joints. Then a quick disconnect outside the chassis is another 46 solder joints. that is doubled for the faceplates (assuming they go in their own fabricated enclosure). Finally the cable that strings the two bulkheads together is another 46x2 solder joints. Thats a grand total of 300 seperate high density solder joints!

I dont know about you, but the opportunity cost of sitting down and making 300 solder joints is too high, not to mention how very easy it would be to route a wire incorrectly in such a slow process.




but these are ribbon cables! hunting for connectors a little (I decided on D-sub connectors for the quick disconnects), I found crimp ribbon headers. How convinient!

all I have to do is line up the ribbon in the right spot, clamp down on the cable, and thats 46 wires, all connected to their proper pins, done right the first time, in less than five minutes! Giving me plenty of time to think about cabinet construction for the remaining chassis and faceplates :cool:



now! there is a matter of the cable that connects the two. What if you wanted to use a non ribbon cable? no problem! I used a 60+ wire cable used to connect SCSI bays together, all twisted pair. Cut off the heads, and I have my own long cable to put these faceplates anywhere. :)

but how does one line up 60 pins on a crimp connector? Well it turns out the crimp sokets are exposed with the cover off and sharp enough to be effective even when using your hands to force the wiring down. I simply pushed down the cabling one pair at a time using a multi meter to confirm I was using the right wires. when I was done, I snapped on the protective cover, and I was done!

300 small wire connections, all routed with electrical perfection, fast as heck and easily serviceable. I will never buy a solder-cup D-sub connector ever again.
 

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Discussion Starter #5
check out a hard drive ribbon cable. the three connectors crimped on is what I am talking about. those are 40 pin connectors. you can buy 20, 26, 12 pin, 68 pin, 72 pin connectors. male, female. many, many, many sizes for any application. radio faceplate or signal processor circuit boards or CD transport from mainboards or LCD screen from the main board. your imagination is the limit! :)

soldering equipment optional ;)
 

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Sometimes ribbon cables have a hard time with passing signals that are not TTL or Cmos as the connections oxidize and wear.

Just ask QSC and Mackie :) They were having HUGE problems wiht intermittent ribbon cables passing low-level audio.

Chad
 

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Whiterabbit said:
holy smokes! I found that gear at my local surplus store for 99 cents the ribbon and 60 cents the connector!

be sure to check out your local electronic surplus store for these parts!

www.halted.com
http://www.weirdstuff.com/
That 68 pin connector is crazy - I didn't even notice the price. They show a 50 pin for less than $5. 100 feet of cable is going to be way more than most people will ever use. Anyway, just linked the photos for those having difficulty picturing the items being described.
 

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Discussion Starter #11
Rudeboy said:
That 68 pin connector is crazy - I didn't even notice the price. They show a 50 pin for less than $5. 100 feet of cable is going to be way more than most people will ever use. Anyway, just linked the photos for those having difficulty picturing the items being described.
I agree, my ribbons were very short lengths. I used a surplus SCSI cable to transmit my signals and its not NEARLY as flexible as that ribbon would be.

It did cost me $1.50 though for 40 feet :cool:
 

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I need some help.. anyone please..
I want to extend a Sony-MEX-M70BT faceplace connection with a cable so i can hide the radio... has anyone done this model or willing to help me?
 
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