[Elecraft] Re: k3 SWR readings seem generous

[Brett Howard]

One thing I think would be really slick is to see a path in which
someone can insert a watt meter such as the LP-100 into the chain
between the output and the antenna tuner where it belongs.  I really
like all of the flexibility that the RX ANT path affords...  Would be
really neat to be able to see something like that on the way out.

~Brett (KC7OTG)


On Fri, 2009-01-02 at 10:01 -0800, wayne burdick wrote:
> Stewart Baker wrote:
> 
> > The K3 output was from ANT1 using the internal ATU. The ATU was
> > automatically tuned to 1:1 on all bands.
> > The results I got for 2:1 VSWR are as follows:-
> >
> > 			   LP-100		    K3
> > 160         1.99                1.8
> > 80           1.99                1.8
> > 60           1.99                1.8
> > 40           1.95                1.8
> > 30           1.97                1.6
> > 20           1.97                1.4
> > 17           1.97                1.3
> > 15           1.96                1.2
> > 12           1.96                1.5
> > 10           1.96                1.4
> 
> Much of this could be attributed to the different locations of the two 
> bridges (see my previous email). Strays will vary from band to band.
> 
> Also, the K3's bridge will be a little more accurate at 100 W than at 
> 10 W due to the bridge diode drops. I compensate for this to some 
> degree in firmware, and I'll review it when I get a chance.
> 
> 73,
> Wayne
> N6KR
> 
> ---
> 
> http://www.elecraft.com
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