[Elecraft] K3 power reduction due to high SWR

[Don Wilhelm]

Dave,

The KPA3 will throttle back power at or above the SWR = 2.0 point.  
Actually, I am not certain about the K3/10 - it may or may not reduce 
power above SWR = 2.0,. but I would suggest that your goal for antenna 
tuning be less than SWR = 2.0.

I you have resonant antennas, then it should be a good thing to tune 
them for less than a 2-1 SWR, but if you are using a properly tuned 
multiband antenna, you should already have an SWR less than 2-1.
If you are using a non-resonant antenna, you already have a tuner 
installed - just set the tuner for the lowest reflected power possible.

73,
Don W3FPR

On 4/4/2012 8:33 PM, David Stratton wrote:
> At what point does the SWR have to rise up to before
>
> the K3/10 output power begins to decrease?
>
> I have been using a TS-830 which is not bothered by
>
> SWR up to at least 3:1. I cannot get the tuner now so
>
> will I be forced to run very low power if my SWR is 2
>
> or 3 to 1? What about the K3/100?
>
>
>
> My antennas are resonant fan dipoles (80, 40, 20, 17)
>
> fed with 250 feet of 72 ohm cable TV coax.
>
>
>
> Dave - KO4KL
>