I am planning on adding a GAD 13 to my two G5s and GMU 11 in my RV-6. I have the GAD 13 and connector kit on order and the plan at this time is to use a probe from an old RMI microEncoder for OAT. The GAD 13 documentation (G5 Manual) says that it will work with an AD590 probe and Garmin lists two less expensive probes that should work.
Since the RMI microEncoder is out of production but they do have PDFs documents online, others that are electrical savy should be able to fabricate their own probe (PDF page 49 & 50 / doc page 51 & 52) for about 1/3 of what the non-Garmin probes cost. Digikey sell the part for the temp sensor for less than $20 and the cap plus a piece of brass tubing to protect does not add that much to the cost.
I will report back IF my homemade RMI OAT probe does not work and will spend the $100 for one of the recommended non-Garmin probes. I have all the parts to make a probe in my hangar except the brass tube. Amazon delivers it on Monday.
Since the RMI microEncoder is out of production but they do have PDFs documents online, others that are electrical savy should be able to fabricate their own probe (PDF page 49 & 50 / doc page 51 & 52) for about 1/3 of what the non-Garmin probes cost. Digikey sell the part for the temp sensor for less than $20 and the cap plus a piece of brass tubing to protect does not add that much to the cost.
I will report back IF my homemade RMI OAT probe does not work and will spend the $100 for one of the recommended non-Garmin probes. I have all the parts to make a probe in my hangar except the brass tube. Amazon delivers it on Monday.
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