[Elecraft] Ideal input voltage for TX on KXPA100?

Don Wilhelm donwilh at embarqmail.com
Sun May 14 18:57:49 EDT 2017


David,

There is no specific voltage, except that "higher is better".

A fused distribution block will add 6 connector junctions and you can 
expect .001 ohms from each one.
At 15 amps draw, that alone contributes about 0.1 volt drop.

73,
Don W3FPR

On 5/14/2017 6:42 PM, David Orman wrote:
> Hi Don,
>
> I'm making sure not to exceed idle voltages like this. If I set the 
> power supply to 14.2V no load, it's 13.8V under load (100W out tune on 
> 80M). I use 10 gauge cable, so I have relatively small voltage drop 
> even with the distribution block and fuses involved. I'm just trying 
> to find out what the optimal voltage under load is for TX cleanliness. 
> Is that 13.8V? Is higher voltage than this better? I appreciate the 
> input; I'm truly just trying to find out what 'ideal' looks like under 
> load.
>



More information about the Elecraft mailing list