Dico wrote:
Perfect.... thanks for your help everyone!

Actually, I *think* the answer is no. I don't have the books in front
of me, but the HSI (actually, the circuit card in the gyro) generates
the excitation signal to the fluxgate. Since the response is only a
phase issue with respect to the excitation signal, I don't see how you
could couple it to two HSI's. [Actually, since it is only used to
maintain alignment over the long-term, I guess you could rig a switch
that hooked the flux gate to one HSI for a few minutes, then the other,
then back again. Not very elegant.]

Now all this is for the old King KCS-55 system. There may be something
newer available.