[Elecraft] KPA-1500 power reading ?

[Jim Brown]

On 2/5/2021 10:22 AM, Ed Stallman wrote:
> I'm using the LP-100A watt meter and comparing it with the KPA-1500 they 
> both read close enough 10 to 160 . On 6m I'm seeing a bigger spread  
> with the LP-100A reading 1500w the KPA-1500 is showing 1375w .

I also have an LP100A inline between my amp and my antenna switching. 
What coax is between the amp and the LP100A, and how long is it? The 
loss in this cable increases with frequency. Also, I believe that the 
KPA1500 reads power on the amplifier side of the tuner, and it's not 
lossless. I nearly always see a fractional dB between them.

73, Jim K9YC