[Elecraft] using an external supply with batteries in unit

[Ron D'Eau Claire]

That's right, Alan. You can safely connect an external power supply with the
internal batteries installed. The KX1 will draw power from whichever has the
higher voltage, the internal battery or the external power supply. 

Of course, that will be the external supply normally, unless you are using a
very low-voltage supply for some reason. 

Ron AC7AC

-----Original Message-----

Hi,

I am running my KX1 off of a 12 Volt supply right now and leaving the 
batteries in the unit.

I assume the purpose of D2 and D3 is to isolate the power jack from the 
batteries when power is applied to the Jack?

Sure looks like it.

73
Alan