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RV-7A Construction Log
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Date:  2-2-2018
Number of Hours:  1.00
Manual Reference:  
Brief Description:  Key Switch Wires

With the EMS about done, I will start working on each component that has a cable that plugs into the Advance System Module. Also, I need to route all the wires to the key area.

First I'll do the key wires. For RPM the plans say to take a feed off the P-Leads from magnetos. The EMS will calculate RPM from the Magnetos. But to do this they add a 30,000 Ohm resister so there is very little amps in the wire.

I added the resistors.
I routed all the key wires thru a hole to the key location.
I'm not going to attach the key right now. I'll wait until I mount the panel.
But I put all the terminals on the wires for the key switch.
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30K Reistor on lead from Mag for RPM

30K Reistor on lead from Mag for RPM

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Key wires complete

Key wires complete

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