[Elecraft] Upgrades to K2 S/N 638

I recently acquired a semi complete K2 (S/N 638). I intend to complete it and suspect there have been several design improvements since it was sold. Could anyone point me to a list of recommended updates/mods that I should incorporate? Thank you. David KM5TZ

Re: [Elecraft] Upgrades to K2 S/N 638

David, I would suggest that you review the A to B mod on the Elecraft website www.elecraft.com (Builders Resource area) before doing anything. Download the A to B instruction manual and make a decision of which 'optional' mods to install (I recommend all of them), and if you are not certain