Evidence Audio SIS/Monorail Solderless Patch Cable Kit
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The very pure solid IGL copper conductor of the Monorail cable is softer than brass. The SIS plug is made from brass which is a bit harder than coppe...Click To Read More About This Product
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Handy kit for the DIY musician.
The very pure solid IGL copper conductor of the Monorail cable is softer than brass. The SIS plug is made from brass which is a bit harder than copper. (Most good plugs are made from a brass alloy as copper would be too soft for use as a plug). The inside of the tip of the SIS plug is carefully machined to have “threads” of a precise size and pitch. These threads cut and re-shape the soft conductor of the Monorail when turning around it several times.
When you push the prepared cable into the SIS plug, the soft copper will find the hole. When you turn the plug 1 or 2 times, the harder brass core of the plug will catch and cut into the copper conductor. When you feel this happen, you put the cap in place and screw the SIS plug into the cap. This action turns the soft copper deeper into the SIS core and mashes the ground up against the SIS body to make ground contact (it is airtight as the copper is deformed inside pushing air from the connection, and it seals the red jacket at the exit tightly so that the cable will not come loose from the plug and the cap will not come loose from the plug body).
When finished the tip/core connection with the Monorail is also airtight and in many ways better than a soldered connection. If you unscrew the SIS plug and remove the Monorail cable you can see the soft copper has been shaped to mate with the SIS core.
