Gordon,
I don't know how you would use any soundcard data to check that, but if
you have an instrument that can extract crystal parameters, that will
work. It is easier to just assume your crystal set is somewhere close
to the midpoint, and that is 3.6.
When you get it all together, you can use Spectrogram (or another audio
spectrum analyzer) to optimize where the filter passband is placed.
You can download a copy of Spectrogram from my website www.w3fpr.com -
scroll near the bottom of the opening page to find the links.
There is some information on my K2 Dial Calibration article about using
Spectrogram.
For more detail along with pictures, look at the Tom Hammond (SK) N0SS
website at http://www.mmccs.com/mmarc/n0ss/index_k2.html (do not use the
Spectrogram download link you will see there - use the link to the local
files on my website).
73,
Don W3FPR
On 3/21/2018 7:13 PM, Gordon LaPoint wrote:
Don,
Thanks! There is no number inked on the envelope. Is there a
way using soundcard data to check?
Gordon - N1MGO
On 3/21/2018 7:04 PM, Don Wilhelm wrote:
Gordon,
If there is no number inked in somewhere on that envelope, someone
dropped the ball when sorting the crystals.
In the absence of a calibration number, assume it is 3.6 - that is
the most common.
73,
Don W3FPR
On 3/21/2018 6:37 PM, Gordon LaPoint wrote:
I'm building a K2, and so far its working. I'm now assembling the
KSB2 ssb adapter. In the step where I'm to put in the Filter
Crystal set I'm supposed to find a calibration number on the
envelope. the Part number is E850006, the only other numbers on
the envelope are:
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