Posted by
Leigh L. Klotz Jr WA5ZNU on
Jun 12, 2004; 12:55am
URL: http://elecraft.85.s1.nabble.com/Scanning-tp367698p367701.html
Yes, thanks. I have used that to get in the right octave and then tried
to pitch match.
Thank you for the info about not narrowing past 500Hz. I have used
gMFSK on Linux to examine the spectrum, and used that for training my
ear, and seen the bandpass but did not know to look for the Jones
effect.
I remember having trouble with my HW-16 when I was a novice and I think
we lowered the output of the neon lamp relaxation oscillator to reduce
its tendency towards ear-splitting.
On Fri, 11 Jun 2004 5:49am, Michael Babineau wrote:
> "Leigh L. Klotz Jr" <
[hidden email]> wrote :
> I find zero-beating the KX1 hard.
> Try setting the filter to 500hz and peaking the received signal ...
> works for me. It takes a bit of practice but become intuitive in a
> short while.
> The reason I use the 500 hz setting and not a narrower setting is ...If
> you hook the KX1 up to a PC running something like Spectogram you'll
> probably see that the center of the passband shifts a bit lower than
> normal with the filter at the 300 hz position, such that 600Hz is no
> longer in the center of the filter passband.
> I'm not sure what the reason it but I have observed the same thing on
> my Ten Tec Scout with the variable "Jones" filter so I an inclined to
> believe that this is an artifact of the design / implementation of this
> sort of filter ...
> perhaps Wayne can comment on this.
73,
WA5ZNU Leigh
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