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ONEX #54 Web Site
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Date: 3-21-2012
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Number of Hours: 3.00
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Manual Reference: E01
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Brief Description: Stratomaster "L" work
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Spent some more time with the Stratomaster L. Added some J and K thermocouples to the RDAC, and wired up a 12V LED warning light to the display unit. The LED light works fine. Edited the menu to turn on the display of the thermocouples. Still getting the same "no data from RDAC" on the display. Will need to contact MGL for any suggestions.
3/29/12- After talking with Matt at MGL in Torrence, found that 12v is supposed to be on the power leads to the RDAC (+12 on red wire, gnd on the shield). I was reading only 3 volts. Also, an earlier email from MGL indicated the output to the RDAC is a 1/8" stereo plug with the tip as signal (blue wire), the +12 on the ring (red wire) and ground on the housing (shield). However, after checking things, I found the Stratomaster "L" has +12 on tip of the jack. I rewired the plug with +12 on the tip and the ring for signal (blue wire). The unit now seems to be working fine, displaying cold junction temp for the CHT and EGT (no thermocouples connected) and room temp with an LM335AZ temp sensor on the oil temp input.
While in Nevada, I stopped at Fry's Electronics to buy a sample NTE R59 ckt breaker for size reference. It is compact and can be mounted with about 3/4" spacing between breakers. When tripped, it shows an obvious white area on the reset switch. It is a thermal trip, so it may take several seconds for it to cool off enough to reset. I tested this 3A breaker by shorting across a 12v battery, and it took about 15 seconds to cool off enough to reset. These are available on-line from Fry's and others at various trip ratings.
Spent some time mocking up the Garmin GPSMAP 196/Airgizmo mount, MGL Stratomaster L, MicroAir 760 radio, switches, breakers, 12v outlet, and phone jacks on a full size cardboard template of the panel. Took pictures of the radio, MGL and Garmin, then resized them and printed full size with Photoshop. Also used Photoshop to make full size prints of the other components from the Sonex online ONX-E01 pdf dwg and NTE pdf spec sheets.
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