Chris,
Yes, that is unreasonable. Using a single signal source to align the
filters will only result in frustration.
Tom's procedure calls for a wideband noise source (the Elecraft N-Gen is
one example). If you do not have a noise generator, use the antenna
noise on any hamband and set the preamp on to increase that noise.
Use Spectrogram (or other audio spectrum analyzer) to see the shape of
the filter passband.
You may also want to review the filter alignment procedure in part 3 of
my website article dealing with K2 Dial Calibration - www.w3fpr.com.
As far as the Tenor C is concerned, align the filter passband so it is
centered close to that frequency, and afterward you can tune the signal
to that note (except that the K2 tunes in 10 Hz steps) Separately, set
the sidetone pitch "by ear" to the setting which gives a pitch closest
to that note. Doing so will set the transmit offset frequency properly
- the sidetone pitch is only indirectly related to the filter passband
setting - the transmit offset is the only connecting link.
73,
Don W3FPR
On 5/31/2011 6:46 AM, Christopher Kimball wrote:
>
> I'd like to set my K2 (S/N 4913) to have a sidetone pitch of tenor C on
> the musical scale. This is corresponds to a frequency of 523.251 Hz. Of
> course the K2 sidetone is settable only in 10 Hz steps, so an exact
> match isn't possible. Oddly, the closest I can get to tenor C is at 510
> Hz, not 530 or 520 Hz.
>
> I'm trying to align the filters with an XG2 RF generator and a pitch
> pipe, using Tom Hammond's, N0SS, procedure. If this is unreasonable,
> please advise.
>
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