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Michael and Gayle's RV-7A
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Date:  6-23-2008
Number of Hours:  2.00
Manual Reference:  
Brief Description:  Heater electrical and miscellaneous

Added a terminal strip to the heater airbox to make connections easier. Also did some calculations to determine what guage of wire came with the heater. First, due to the thickness of the wire insulation, I'm guessing it's auto-grade wiring. Second, there are 32 individual strands of ~.007 each that totals a CMA of .70 (.007 x 3.14 * 32) which is roughly a 13 guage wire. Hmm, pretty big wiring. I doubt that much is needed, so I decided to measure the AMPS of all three switch positions. Found the following: 1.6 Amps on Low, 1.9 Amps on Med and 2.4 Amps on High. Hmm, I expect to protect this circuit with a 10 AMP fuse, so 18 Guage Aircraft wiring will do just fine.
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Terminal strip for Heater wiring

Terminal strip for Heater wiring

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A 10K Variable resistor for setting the AOA Alarm volume

A 10K Variable resistor for setting the AOA Alarm volume

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Variable resistor front-side view

Variable resistor front-side view

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