75 ft. 3.5mm extension cable - too long? - AVS Forum
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Old 06-14-2012, 07:39 AM - Thread Starter
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I am adding an IR repeater to a home audio setup. Monoprice sells an inexpensive one that uses 3.5mm connections.

http://www.monoprice.com/products/product.asp?c_id=109&cp_id=10110&cs_id=1011009&p_id=7537&seq=1&format=2

The room is about 65 ft. away (based on running a cable through walls, attic.

Cat5 was recommended, and while I found the parts express keystone that puts a female end on one end (http://www.parts-express.com/pe/showdetl.cfm?&Partnumber=182-836), I have not been successful in figuring out how to attach the cat5 wires to a 3.5mm MALE pin on the other end to go into the receiver.

So, I am considering using a 75 ft 3.5mm male/female cable instead.

http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10218&cs_id=1021808&p_id=652&seq=1&format=2

Will there be any issues with signal loss? It would be a LOT less work and expense going this route.

Of course, i could also go wireless:

http://www.monoprice.com/products/product.asp?c_id=109&cp_id=10110&cs_id=1011009&p_id=7973&seq=1&format=2
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Old 06-14-2012, 08:32 AM
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If you decide to keep or go with the cat5 (which I would recommend for 65' run vs. wireless)you simply put one of the female 3.5mm keystones at each end of the cable. Then you use a 3.5mm male to male cable to connect between the IR repeater and the keystone.

http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10218&cs_id=1021812&p_id=5575&seq=1&format=2
The 75' male to female cable should work ok as well but if you are using wall plates the keystones will be easier to work with.
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Old 06-14-2012, 08:38 AM - Thread Starter
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will the cat5 be better on signal transfer than the 3.5mm?

I am only using a keystone plate in the TV room (are they standard size holes?). The other end terminates in my "electronics closet" and would simply drop from a hole in the ceiling - no plate used there.
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Old 06-14-2012, 09:03 AM
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You just need some (preferably) solder type 3.5mm connectors with the gender needed in your situation. They have these at Radio Shack as well. Just pick two colors out of the four in a CAT5 cable. Call one color + and the other -. You may ignore the other cables. Match the colors to the same part of the connectors on both ends. You now have a custom 3.5mm extension cable.
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Old 06-14-2012, 09:13 AM - Thread Starter
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Sounds good, but what about my question regarding signal strength? All of this effort isn't worth the trouble if the 3.5mm extension will work just as well as my homemade cat5.
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Old 06-14-2012, 11:22 AM
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They will both probably work the same.

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