How do you wire a P-mag to a JPI 740 instrument? The 740 wiring diagram wants "RPM +5v" and "RPM ground" besides the tach signal; the P-mag has just a tach signal output. I suppose the answer revolves around what to do about the voltage. But there's always the matter of pulse frequency matching and perhaps more than simply joining the signal wires.
John Siebold
Boise, ID
John Siebold
Boise, ID