[Elecraft] Keying CW in SSB Mode

[Dauer, Edward]

I wonder if this explains something I ran into during FD.  On several occasions – usually late at night – I was able to do some running, all on CW.  Five or six times over several hours I heard stations calling me way off my frequency.  It seemed like a Khz or more, though I didn’t measure it at the time.  They were outside the passband and I heard them only when, after a CQ, I tuned the RIT widely on either side.  I wondered why that would be happening.  I certainly wasn’t the target of a pileup.  One possibility I thought of was that those callers had forgotten to cancel split after the last time they intended to use it.  But this thread about audio tones keying CW on SSB suggests another.  Is it possible that they were using CW keying on USB or LSB which resulted in a frequency offset of, typically, 600 (or, as Don suggests, 1200) Hz?  If so, it seems like it wouldn’t be a great strategy during a contest on a crowded band.

Ted, KN1CBR
    
    
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    Message: 22
    Date: Fri, 30 Jun 2017 00:20:39 -0400
    From: Don Wilhelm <donwilh at embarqmail.com>
    To: Terry Brown <n7tb at comcast.net>, elecraft at mailman.qth.net
    Subject: Re: [Elecraft] Fldigi and signallink question interfaced to
    	KX3
    Message-ID: <181f3ee7-f8be-56dc-46f1-14482198b9dc at embarqmail.com>
    Content-Type: text/plain; charset=utf-8; format=flowed
    
    sorry about the blank response.  It is late here and the fingers do not 
    work well.
    
    Fldigi uses audio tones for keying, and you need to be in SSB mode 
    (typically USB or DATA A) to transmit on the proper frequency - CW 
    included - but I would expect twice the sidetone pitch.
    Use DATA A mode when trying to send CW via the Fldigi CW mode.
    
    CW is "just another digital mode" although one that can be decoded by 
    the human brain for those who know morse.  It uses audio tones to send 
    CW, do the carrier frequency USB frequency will be the transmit 
    frequency plus the frequency for the sidetone in Fldigi.
    
    73,
    Don W3FPR
    
    On 6/29/2017 11:26 PM, Terry Brown wrote:
    > I have a KX3 connected to a Signalink and Fldigi.  It seems to work fine for
    > all the digital modes.  I can use it to decode CW, but have never sent CW.
    > I clicked on the CQ button and all that happened was that my transmitter
    > went into transmit mode, but nothing was transmitted.  If I  put the KX3 in
    > LSB it would transmit cw fine, but was always off frequency by the amount of
    > my sidetone.