Originally Posted by
chorner
Don't think it's the voltage that has anything to do with the TM1000 not reading the RPM. It's an incompatibility with the output of the RCEXL tach and the RPM input adaptor. Some have tried tapping straight into the hal sensor with luck.
Also the pitch isn't "different" on a large prop. It's just whatever gives the engine the proper load, and you can adust slightly with pitch and diameter to better suit the specific application.
The issue is getting a signal to the tach, the coil 'might' provide it?
It may also have to be amplified to a usable level?
If so, I could possibly build a little amp with a few op-amps.
Something to think about.