[Elecraft] KX1 Displayed voltage question

[Mike Morrow]

Phil wrote:

> I have applied 13.66 volts from my HP lab power supply...
> also I measured it with the Fluke 179 and a Fluke 2840. Both
> Flukes are more or less in agreement.
> The KX1 battery display says it is 13.3vdc when it is powered up.

The difference between the external supply DC voltage and that 
indicated by the MPU-controlled LED is due to the voltage drop
across the reverse polarity and external/internal DC power
auctioneering diode D2.

What the LED shows is, in fact, the voltage at which the KX1
internal electronics are operating.  It's all perfectly correct.

Congratulations on your new license.

73,
Mike / KK5F