[Elecraft] K3 :: inboard voltmeter and ammeter

[Don Wilhelm]

Steve,

I would expect a 10% accuracy on the metering.  It sounds like your K3 
meets that on the current measurement at higher levels, but goes higher 
at low current readings.  I would not suspect anything wrong.

As for the voltage reading - yes, you can expect a voltage less than the 
applied voltage, and it will be lower by about the drop of a schottky diode.

73,
Don W3FPR

inventor_sixty_one wrote:
> Are there any specs for the accuracy of these meters?
>
> Mine are not very accurate.  For example, on RX, the ammeter reads
> about 200 mA low.
> Measured current is 1.24A but the rig says 1.02A.
>
> The voltmeter is also shy, by what looks like the voltage drop of a Si diode.
>
> When transmitting at 100W carrier, the ammeter reads about a half-amp low.
>
> Not really that big a deal -- except if it's indicating I have messed
> something up.
> It's for the same reason that I check my gas mileage every fill up.
> If it changes a lot, I know something is amiss.
>
> 73 mx Steve KZ1X/4
> Celebrating nine years on this reflector 12/1999-12/2008
>   
>