k2 cw-cw reverse tones are different

[tom-239]

good eve. A long time issue for me is the difference in the pitch of cw normal and cw reverse, they are different. I have set bfo setting several times with no difference. any suggestions?? thanks.
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

[Ron D'Eau Claire-2]

Tom, KM4CU wrote:

A long time issue for me is the difference in the pitch of cw normal and cw
reverse, they are different. I have set bfo setting several times with no
difference.

--------------------------

How different Tom?

The K2's logic design allows for an error of up to 20 or 30 Hz, just like
all the other BFO settings. That was tradeoff with cost and complexity.
Getting the BFO frequency settings predictably closer would have involved
substantially more of both <G>

All that's happening when going between CWn and CWr is the BFO frequency is
being changed. It's identical to what goes on as you step through the
various filter bandwidths.

Also, like the other filter settings, you *must* set up the BFO frequencies
while watching a noise display on Spectrogram, or at least not trying to
adjust the tone listening to a signal. The local oscillator and beat
frequency oscillators interact, which will defeat any attempts to "tweak"
the tones while actually listening to a signal.  

Ron AC7AC

-


_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Would just like to add that it's also important to have the signal of
interest zero-beat with respect to the bfo frequency *before* switching
between CWn and CWr. Failing to do so will guarantee that the normal and
reverse pitches will not be the same (assuming everything else is set up
properly).

73, Dale WA8SRA

Ron D'Eau Claire wrote:

>Tom, KM4CU wrote:
>
>A long time issue for me is the difference in the pitch of cw normal and cw
>reverse, they are different. I have set bfo setting several times with no
>difference.
>
>--------------------------
>
>How different Tom?
>
>The K2's logic design allows for an error of up to 20 or 30 Hz, just like
>all the other BFO settings. That was tradeoff with cost and complexity.
>Getting the BFO frequency settings predictably closer would have involved
>substantially more of both <G>
>
>All that's happening when going between CWn and CWr is the BFO frequency is
>being changed. It's identical to what goes on as you step through the
>various filter bandwidths.
>
>Also, like the other filter settings, you *must* set up the BFO frequencies
>while watching a noise display on Spectrogram, or at least not trying to
>adjust the tone listening to a signal. The local oscillator and beat
>frequency oscillators interact, which will defeat any attempts to "tweak"
>the tones while actually listening to a signal.  
>
>Ron AC7AC
>
>-
>  
>

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com