Two coil pi diodes.

[6666]

Hi Gary
just looking at your twin coil PI schematic that you designed 
and just wondering what is your theory for the difference in the number of diodes on the input to the pre amp
there are 4 diodes on the + pin3 and only 2 on the -pin 2
why is that ? as in theory I guess, that the twin coils should have the same
fly back voltage ?
Posted this on Geotech as well
thanks.

[Gary Lecomte]

It works Equally well with either the 2 diodes or the 4 diodes on either or both of these inputs.
I just did it this way on my original proto board and never changed it.