[Elecraft] K3 Voltmeter calibration ...

[Brian & Cyndi]

Joe, if you just want to make the K3's voltmeter match your "known good" 
reference meter, you need to adjust the "ADC REF" value.

Go into the CONFIG menu, set Tech mode "On", then go to the "ADC REF" 
setting.  Note what it is before changing anything, in case this 
adjustment affects anything else adversely.  Adjust the ADC REF value to 
cause the voltmeter display to read the value you want. You will need to 
go in and out of the menu display to see the results (kinda clumsy).

Again, this adjustment may affect other measurements, so an accurate K3 
voltmeter may not be that important after all.

73,
Brian, W6FVI

On 11/24/2015 9:32 AM, Joe Subich, W4TV wrote:
>
> It matters not if there is a series diode.  The Voltmeter should
> be calibrated to the input power.  I remember that being the case
> when I assembled my first K3.
>
> 73,
>
>    ... Joe, W4TV
>
>
> On 11/24/2015 11:02 AM, Michael Blake wrote:
>> Joe, is there not at least one diode junction or solid state switch 
>> in series with the input power inside the K3?
>>
>> Michael Blake - K9JRI
>>
>>
>>
>>
>>> On Nov 24, 2015, at 10:06 AM, Joe Subich, W4TV <lists at subich.com> 
>>> wrote:
>>>
>>>
>>> OK, I'm sure I am overlooking something simple but I can not find
>>> (or remember) how to calibrate the voltage display in the K3.
>>>
>>> I had to repair one of my Astron RS-35A power supplies for the first
>>> time in 30 years (one of the diodes shorted) and when I put it back on
>>> line I decided to double check the K3 Volts display against the actual
>>> output of the supply.  The K3 is reading about 0.2V less than the
>>> supply voltage.
>>>
>>> I've been over both the K3 Owner's Manual and the K3 Assembly
>>> Instructions but can't find any reference to calibrating the voltage
>>> display.
>>>
>>> 73,
>>>
>>>    ... Joe, W4TV
>>>
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>>
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