Bill,

I don't believe it is the engine causing the interference because I have quite a few hours on it, and has never been a problem. However, as you say, the ignition has to be eliminated so I will try your aluminum foil suggestion. The conversion is a RCIGN which are a better on interference. The plug is a resistor type, most definitely.

I got thinking over lunch and realized I used a metal clevis to connect to the tailwheel metal control arm on the pull-pull steering system. Could this be a contribrutor? I don't know why I did that, and it's buried inside tail.

Chuck