[Elecraft] QST Review of KSYN3A synth has erroneous TX phase noise plot

[Wayne Burdick]

Hi Ken,

When they issue a revised Figure 10 for the article, we'll put it on our website.

73,
Wayne
N6KR



On Oct 20, 2015, at 12:07 AM, Ken Chandler <G0ORH at sky.com> wrote:

> Hello Wayne
> Would like to view both ARRL (old v new) synth plots side by side if possible! 
> Don't subscribe to ARRL, so not privy to that info!!
> 
> Ken.. G0ORH - M3i
> 
> Sent from my iPad
> 
> 
>> On 20 Oct 2015, at 01:03, Wayne Burdick <n6kr at elecraft.com> wrote:
>> 
>> Hi all,
>> 
>> You may have noticed that QST recently reviewed the K3's performance before/after swapping in a new KSYN3A synthesizer. While the review text was accurate (and complimentary), there was a significant error in the KSYN3A TX phase noise plot (Figure 10). This error made it appear as if the original synthesizer had lower (better) wide-spaced phase noise than the KSYN3A (starting where the plot lines cross), which is not the case. 
>> 
>> We should have caught this ourselves before the article went to print. We greatly appreciated the League's efforts to determine the source of error -- equipment setup -- and re-test. The digital-print version of QST will be corrected, and a correction will also appear in the December QST.
>> 
>> The ARRL sent us the revised TX phase noise plot for the K3+KSYN3A that they tested. You can see it here:
>> 
>>  http://www.elecraft.com/specs/Joel's%20K3%2010-19-15%2020%20meter%20phase%20noise.BMP
>> 
>> In addition they're testing a K3S. Its TX phase noise plot looks as good or slightly better:
>> 
>>  http://www.elecraft.com/specs/K3S%2010-19-15%20%2020%20meter%20phase%20noise.BMP