[Elecraft] K2 Build #7552 Progress

[Don Wilhelm]

Kevin,

The K2 alignment and calibration is designed to use the built-in tools 
and they will allow you to align it to perfection.

There is one area that is missing from the manual information, and that 
is the dial calibration and filter alignment.  For that, take a look at 
my webpage article dealing with Dial Calibration at www.w3fpr.com.
Ideally you should use Spectrogram for aligning the filters so you can 
see the passband width and placement in the audio spectrum that is 
produced by your filter width and BFO adjustments.  You can download a 
copy of Spectrogram from my website - look for the link near the bottom 
of the opening page.  This is a local copy that has been scanned for 
'bad stuff' numerous times.  Norton does not like it, but all other 
scanners report it to be a good copy.

There are other good audio spectrum analyzers out there, but I happen to 
like Spectrogram the best for this purpose.

73,
Don W3FPR

On 10/24/2014 9:27 PM, Kevin Schache wrote:
> I have now completed up to the start of Assembly, Part III, P67, with 
> all tests and alignments done.
> AND BEST OF ALL, it works!!  I have actually heard several strong SSB 
> signals on 40M...... YAAYY!!
>
> Although I am limited with test equipment, I've managed to pass all 
> tests.
> But I will hopefully be calling on some higher precision equipment for 
> the final alignment in due course.
>
> I think one of the biggest lessons I've learned is not to over 
> compensate for my old soldering skills by minimizing solder too much.
> Having got the right brand and gauge of solder, and an appropriate 
> temperature compensated iron, this heavy handed old vacuum tube 
> builder  became just a little too frugal. Many joints needed an extra 
> touch up during testing, but hey, I'm learning!
>
> The only thing i have noticed is that the audio gain does not seem to 
> act as I would expect while listening to an SSB signal -  the volume 
> seems to increase marginally from minimum and then stay constant over 
> much of the range before increasing slightly at the end  . Maybe this 
> is another case of an extra touch of solder somewhere, or maybe it's a 
> normal function of how the AGC level works?
>
> Now, it's on to Assembly Part III, P67!!
>
> 73,
> Kev     VK5KS
>
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