Posted for "Lancair" <lancair@USTEK.COM>:

 Scott,
 
 It seems the dual diode setup is a technique to protect the electronics
 when using a single alternator feeding an essential avionics bus from
 two separate busses.  My panel is two completely separate systems (each
 alternator feeding a single battery and powering a single buss) that can
 be tied together with the bus-tie if one alternator craps out.  In my
 scenario is it possible that these diodes would afford additional
 protection when the buss-tie is activated?
 
 Robert