[Elecraft] K3 Voltmeter calibration ...

[Joe Subich, W4TV]

> You could easily drop 0.2 volts in the cable depending how long it
> isand the gauge of the wire.

Not in six feet of #10 wire at 1.5A.  Even if it were #12 the voltage
drop should be less than 0.03V (1.62 Ohms/1000 feet for #12).

73,

    ... Joe, W4TV


On 11/24/2015 10:39 AM, Robert Nobis wrote:
> Joe,
>
> How long is your power cable from the RS-35A to your K3, and what gauge wire is used?  You could easily drop 0.2 volts in the cable depending how long it is and the gauge of the wire.
>
> 73,
>
>
> Bob Nobis - N7RJN
> n7rjn at nobis.net
>
>
>> On Nov 24, 2015, at 08:06, 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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>
>