[Elecraft] Zero beating & audio

Sat Jan 19 15:12:17 2002

Hi folks - I've been watching the progression of the discussion from my
original note about zero beating. Zero beating by ear, at least in my
case, was not the problem because I can match tones - the original
question had to do with where the word "beat" came into it etc.....the
ideas that have shown up are terrific ideas for graphic representations
which are interesting and fun.........I doubt if anybody advocates a
laptop on a backpack trip hi hi - but it sure is neat to see various
chracteristics of how your rig works on a screen when you're in the
shack....thanks for the interesting thread! It's been educational!
73/Tim Logan KB7OEX

KC0IFL wrote:
> 
> I have done this and it really does work!  "CW Get" works also.  Anything
> that will show the audio frequency on the computer screen.
> 
> Ron E.
> 
> ----- Original Message -----
> From: "George, W5YR" <[email protected]>
> To: "Steve Lawrence" <[email protected]>
> Cc: <[email protected]>; <[email protected]>
> Sent: Friday, January 18, 2002 9:58 AM
> Subject: Re: [Elecraft] On zero beating
> 
> > That "ultimate spotting tool" is as near as your computer connected to
> your
> > radio audio output and running any of the PSK31 programs with a waterfall
> > display or the SpectroGram program.
> >
> > With such displays, one can readily identify the offset tone frequency
> > being heard and can then adjust the tuning to present exactly the desired
> > tone. For example, I prefer an offset of 700 Hz so I have a waterfall
> > marker set on my PSK31 program at 700 Hz. When tuning in a CW signal, I
> > merely tune until the signal "track" is placed under the marker. Then I
> > will be transmitting directly upon the other station's frequency and will
> > hear that station at an audio frequency of 700 Hz.
> >
> > I have found this method superior to all others, plus it gives you a
> > panoramic display of other cw signals within the receiver filter passband
> > being displayed.
> >
> > Of course, this approach requires that a computer be present and running
> > the proper program so it wouldn't have much appeal for portable operation
> > unless a laptop were available. But, for home station use, it is a
> valuable
> > tool to have when working CW.
> >
> > 72/73/oo, George W5YR - the Yellow Rose of Texas
> > Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
> > Amateur Radio W5YR, in the 56th year and it just keeps getting better!
> > QRP-L 1373 NETXQRP 6 SOC 262 COG 8 FPQRP 404 TEN-X 11771
> > Icom IC-756PRO #02121  Kachina #91900556  IC-765 #02437
> >
> > All outgoing email virus-checked by Norton Anti-Virus 2002
> >
> >
> > Steve Lawrence wrote:
> >
> > > Perhaps the "ultimate" spotting tool would be to measure the audio
> > > frequency of a received CW signal and display it -- perhaps at the touch
> > > of a button.  Knowing your sidetone is set to, say 700Hz, you could then
> > > adjust the dial frequency so the received CW signal is also at 700 Hz.
> > > Since the K2 has a frequency counter logic, perhaps this feature could
> be
> > > implemented?
> >
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