RE: DX8 telemetry RPM pickup for Gas engines - SOLVED!!
Todd,
I'm not sure that your concerns are valid WRT the ignition pick-up. The TM-1000 seems quite happy to recognize the pulse coming from the Hall effect sensor that feeds the CDI. The CDI unit is well shielded and sits up in the fuel tank compartment, well away from the Receiver, and even further away from the Satellite Rx which I have mounted as far towards the aft of the aircraft as possible. I'll be the first one to post any problems that I see in flying this weekend. That said, I do have a backup plan in that I have ordered several SPM 1452 Optical sensors and it should be fairly easy to have a black strip with the appropriate white space behind the propeller on the motor collar. If you have not yet experimented with the Optical sensor, give it a shot. They are ~ 6 bucks and changing the connector is a snap. As far as I'm concerned it is the ONLY way to go for electrics.
KKKKFL