Posted by
David A. Belsley on
Feb 04, 2005; 3:36pm
URL: http://elecraft.85.s1.nabble.com/Newbie-Question-K2-CW-Operation-tp374288p374291.html
On Feb 4, 2005, at 4:43 AM, frank wrote:
> I'm thinking of ordering a K2 but I have some questions that I
> cant find answered in the downloaded manual.
>
> 1. The lowest cw pitch note is 400hz (which I think most prefer) but
> the info I read in the manual states its best to use a pitch note
> between 500 to 600hz for best results. Does anyone have an idea
> why that is the case?
Side tone is mainly a matter of preference. However, the lower the
side tone, the greater the chances that the wider filters, which tend
to be centered on the side tone, will extend to the other side of zero
beat. With the widest filters, you can avoid or mitigate this by
setting the side tone off-center, so that the filter skirts act on
zero. Higher side tones make this easier and more effective.
> 2. The manual states that the cw bandwidth can be selected from 200
> to 2000 Hz. If you were receiving a solid S9 signal, when you tune
> through the signal is it possible to hear the other side of zero
> beat at any filter bandwidth?
As mentioned above, with the wider filters, set the side tone lower
into the filter band pass so the skirts have an effect at zero.
> 3. If the DSP option is added does the audio DSP filter track the CW
> bandwidth selection. Or do you need to select them separately?
The DSP and K2 filters are independent and must be set separately. I
recall Lyle mentioning that he wished to have them linked, but there
wasn't room in memory (or something) that made that not possible at
this time. Perhaps in the future. Overall, you will find no real
problem with this, and there are times when the ability to set the two
filters separately is a decided advantage.
best wishes, (and don't hesitate to get a K2 -- it's simply a wonderful
piece of ham gear and a wonderful build),
dave belsley, w1euy
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