[Elecraft] Re: k3 SWR readings seem generous

[Stewart Baker]

No problem Wayne.
I always use 5W, and the LP-100A when I tune up my external ATU.

73
Stewart G3RXQ

On Fri, 2 Jan 2009 10:01:08 -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