[Elecraft] K3 to K3S Upgrade Questions for Elecraft

[David and Dianne on Comcast]

Wayne,

I have several questions for you as I consider the 
K3S upgrade decision in the near term.

My early K3 (Feb 2008) has an early sub-receiver 
installed.  I may be interested in purchasing a 
K3S but would like to use my current sub-receiver 
in the new K3S to keep the cost down. I believe 
you indicated earlier that it is compatible and is 
possible to do. So....

1. Will my original sub-receiver's DSP board also 
work in the K3S? Will a new sub-receiver DSP board 
work with an original sub-receiver in the K3S? Any 
other considerations or suggestions?

  2. Can you summarize the changes from the early 
KPA3's to the more recent KP3A?

3. Has the K3 mixer board and its circuit on the 
K3 RF board undergone any changes from the early 
K3's to the K3S?

Your commentary will be appreciated.

Thanks and 73 de N1LQ-Dave