[Elecraft] K3 Band Data Information Needed

[Barry Simpson]

I want to interface my K3 with a newly acquired SPE 1.5KFA amplifier using
the band data available on the K3 Aux In/Out socket.

Elecraft refer to the data as Bands 1,2,3 and 0 whereas SPE (and other
manufacturers) call them Bands A,B,C and D.

Please can someone let me know if A,B,C,D = 1,2,3,0 or 0,1,2,3 or some
other sequence.

Thanks

Barry Simpson  VK2BJ