SonexBuilders.net

Hi,

I am hoping to pick the brain of someone flying their AeroVee with Dynon EMS-D10 instrumentation.

I am having trouble getting the tach to work properly on the EMS-D10 when picking up from the AeroVee magnatrons. Indications were erratic with a each 19K and 30K series resistor, and I had no indication with a 47K series resistor. The Dynon manual says to keep increasing series resistance (up to 150K) until indications stabilize, but that isn't working in my case.

Has anyone been through this before and found a solution?

I have a good tach when picking up off of the electonic ignition (with a 30K series resistor), but I want to have two tach inputs to the Dynon so I don't lose RPM indication when I check the ignition systems.

Thanks,

Andrew Doepner
N14YX

Solved! I decided to abandon picking up a tach signal from the magnatrons and used the alternator instead.