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tachometer ballast resistor

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rowlandcarson(at)gmail.co
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Posted: Tue Jan 19, 2021 1:20 am Post subject: tachometer ballast resistor

I’m wiring my Europa XS with a 912ULS engine. I have fitted the factory-supplied UMA tacho and am also taking the engine tacho output to a MGL E-3 engine instrument and a Smart Avionics CSC-1 prop controller.



The UMA manual calls for a 270Ω resistor across the engine tacho output (if the readings are erratic). The MGL manual calls for 220Ω (and one is supplied).



Does anyone know if using the 220Ω resistor would make the UMA tacho unhappy?



in friendship



Rowland



| Rowland Carson          ... that's Rowland with a 'w' ...

| <rowlandcarson(at)gmail.com>            http://www.rowlandcarson.org.uk

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