[Elecraft] Re: KX1 Zero Beat

[Leigh L. Klotz, Jr.]

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" <Leigh at WA5ZNU.org>  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