Denis,
That little 'chirrup' should go away after you run CAL PLL. Make
certain you have the bottom cover in place when you do run it.
L34 tuning is quite broad and should be adjusted for the best signal to
noise ratio. Rather than using a signal generator, the best method is
to turn on the pre-amp and tune to the 7000 kHz birdie (no antenna
connected) and a banswidth of about 400 Hz. If you have discerning
ears, you can hear the loudest signal and near the point you may hear
the minimum noise. If you cannot hear it, set the slug somewhere
between 1 and 2 turns from the top.
When you get Spectrogram up and running for your final filter alignment
(that filter procedure is not in the manual but is on the Elecraft
website), you can use Spectrogram to observe the point where the signal
is still at maximum while the noise floor outside the passband is at a
minimum.
If you do not have it already, you can download Spectrogram 5.17 from
Tom Hammond's website www.n0ss.net.
73,
Don W3FPR
Denis Jackson wrote:
Hi!
This afternoon I got my new K2 to "Alignment and test, Part II"
All seems to be fine with one small exception - and maybe it's just
just the way it is but I thought I would ask anyway.
I applied a signal at -110dBm on 7.020Mhz to make the various tuning
adjustments. Apat from not being able to peak L34 (which I see from
earlier posts is another story altogether) I noticed that tuning very
slowlywith the VFO results in what I can only describe as a little
"chirrup" with every 10Hz step. Is that just the way it is with this
design or have I something I need to look into?
73
Denis MW0CBC/GW8OQV
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