[Elecraft] [K3} KXV3B's extra preamp on 160m RX?

[Guy Olinger K2AV]

Is there a way to select the KXV3B's extra preamp for use with low band RX
antennas. I am in the spot of putting a separate preamp in line to do what
the 10/6 m auto extra preamp already does.

I've already been digging for something like that in doc and manual but
can't find anything, so if someone knows where the relevant material
resides, or what the secret word for searching that material is, I would
appreciate that greatly. I am probably the world's worst scratch searcher.

Many Thanks & 73

Guy K2AV