[Elecraft] [KX3] KX3 Supply Voltage reading low

[David Anderson]

Arlen,

I wonder if what you are seeing on the display is the internal battery pack voltage rather than the external power supply voltage, either are selectable from the menu. The internal pack may increase slightly when the load is removed if you are running from external batteries.

Sorry if as we say over here if "I am teaching my grandmother how to suck eggs" :-)

73

David Anderson GM4JJJ 

> On 15 Aug 2014, at 17:34, Arlen Fletcher <arlenfletcher at mac.com> wrote:
> 
> 
> Greetings all!
> 
> My KX3 has the set of internal NiMH batteries and currently reads 9.9v while idling (I haven’t charged the batteries recently). When I power the KX3 from an external 12V SLA battery - which reads 12.2V on my Fluke DMM - the KX3 reports 10.2V while idling. I might expect the KX3 to report slightly less than 12.2V if there is a diode on the supply input (I haven’t checked the schematics), but 2V seems like a significant difference. I’d welcome any feedback from the list on this issue.
> 
> Thanks!
> 
> 73, Arlen - AA7F
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