Thanks, Bob.

Yes, closing PTT allows sending at high speed.  I rarely send at over 35 wpm, but I guess I can just turn on the PTT when I do.  (I have an actual switch for that purpose. Remember those?) Firmware is up to date.

It doesn't sound like the KSYN3A will solve this problem, though, whatever its other merits.  I've never found the phase noise of the original to be an issue, so it's hard to justify the expense.

73,

Scott K9MA


On 9/6/2017 01:51, Bob Wilson, N6TV wrote:
The 37 WPM jitter issue is actually related to VOX timing (with either QSK or semi-breakin).  If you hold the PTT line closed while transmitting, via a foot switch, software-controlled  PTT, or an external keyer like a WinKey with a PTT output, you can send as fast as you like, no CW jitter, but you give up QSK and semi-breakin.  This works whether you have VOX ON or OFF.

For more details, see this post from about 4 years ago:

http://lists.f5mzn.org/pipermail/support/2013-November/083384.html

The new KSYN3A synthesizer is highly recommended though, especially for QRQ CW.

Also, what firmware version are you running?

73,
Bob, N6TV

On Tue, Sep 5, 2017 at 8:19 PM, K9MA <[email protected] <mailto:[email protected]>> wrote:

    I just learned of the "37 wpm" problem with the original K3
    (non-S), which I have.  I just verified that, indeed, above 37 wpm
    the cw gets all messed up.  This seems to occur whether in QSK
    (Break-in) or PTT mode.  The problem seems to go away, at least up
    to 50 wpm, in the QRQ mode.

    A possibly related issue is the slow QSK recovery.  In the normal
    QSK mode, one can just hear between the dits at 16 wpm.  In QRQ
    mode, that goes all the way up to 18 wpm.

    Does the new synthesizer ala K3S solve either of these problems?
    If not, is there another solution?

    73,

    Scott K9MA

-- Scott  K9MA

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