[Elecraft] K3: Do you "Juice" your K3?

[Jack Smith]

I have a small mountain of data with efficiency and transmitted 
intermodulation versus supply voltage for my K3, but have yet to finish 
analyzing it.

For the most part, higher voltage = better transmitted IMD, but the 
lower the overall DC efficiency (RF watts out / DC watts in).

I've not desired to tempt fate  by running the tests above 15.0V, 
however, and I don't recommend exceeding 15.0V under any circumstances.

Most of the benefit of higher voltage operation can be achieved in the 
13.8  to 14.2 V range, as measured at the K3's DC input connector. 
Remote voltage sensing to obviate the cable drop is quite useful here, 
*if one knows how to properly use it*. If the power supply is not 
equipped with an over-voltage trip, however, a failure in the remote 
voltage sensing cable could lead the power supply to put out sufficient 
voltage to damage the K3.

Jack K8ZOA


Darwin, Keith wrote:
> -----Original Message-----
> From:  w8zn at comcast.net
>
> I don't think we even want to go here, Eric, PLEASE stop this thread
> immediately!!!!
>
> -------------------------
>
> Why?  I think it is an interesting question.  I suspect that increasing
> the input voltage will either have no effect or will cause harm if done
> too much but would like to hear the inputs from the experts.
>
> - Keith N1AS -
> - K3 711 - 
>
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