[Elecraft] K3 power out - key down

[Lyle Johnson]

Two answers below.

73,

Lyle KK7P

> 1) Can the KXPA100 and KX3 tolerate the higher voltages of a fully 
> charged 14.8V battery pack? (In the range of 16V).

No.  The products are not guaranteed to FAIL if you apply 16 V, but they 
are not designed to operate from 16 V, either.

> 2) Do the KX3 or KX3 pull proportionally less current for the same 
> power output from a 4-cell pack as compared to a 3-cell pack?

The KX3 low voltage supplies are primarily switching supplies, so 
current drain at a higher input voltage will be less than the current 
drain at low supply voltage.  The PA (KX3 or KXPA100) operates directly 
off the supply power and current is proportional to power level and 
drive, but not supply voltage.