[Elecraft] Rev C KPA3 ??

[O. Johns]

Dear Wayne and Eric,

The alert "K3/100 Rev C KPA3 Spurious TX"  has alerted me to the fact that there IS a Revision C of the KPA3.  Apparently, it began shipping sometime in the spring of 2009.  Maybe one of you could tell us in some detail about the differences between Rev C and Rev B.  In particular:

(1)  Do the two revisions use the same transistors?

(2)  Are the IMD numbers different?

(3)  How and why is the circuit diagram different?

(4)  Would it benefit a customer with Rev B or earlier if he upgraded to the Rev C?

Thank you for the fine product.

73,

Oliver Johns
W6ODJ