I don't understand why the first dit would be any different than any other
dit. With full QSK, the receiver completely recovers in between each
element. This should indicate that if there was any dit shortening, it
would occur on all dits, not just the first one, since in reality all dits
are the first dit after receive.
Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "Bill Tippett" <btippett@alum.mit.edu>
To: <tentec@contesting.com>
Sent: Thursday, December 25, 2003 10:33 PM
Subject: [TenTec] K2/100, Orion review
> Barry, here are my comments on Orion's keying:
>
> 1. The internal keyer sounds too light to my ears, even
> with Weighting at the max 150%. It doesn't bother me
> since I prefer my external Logikey anyway. This was not
> an issue in the waveform you saw since that was using
> an external keyer.
>
> 2. CW Rise/Fall could affect the weighting of all keyed
> signals (internal or external). Default is 5 mS but 3 mS
> may be better for QRQ and 10 mS for QRS. I normally
> leave mine in the 8-10 area for normal 25-30 WPM DX-ing.
> In contests, where I typically use 32+ WPM, I set it to
> 5 mS.
>
> 3. My Logikey has a weighting control which I set to
> 55 with my previous MP and TS-930S. I found I liked
> the sound with Orion with it set at 58, so there may
> indeed be some slight shortening of the elements
> compared to former radios. This could also have to
> do with the shaped CW elements Orion uses described
> below. This may make the elements sound lighter to
> my ear since the Rise/Fall time is probably shorter. I
> recall unmodified clicking MP's have a rise time of 2 mS.
>
> http://www.doug-smith.net/cwbandwidth1.htm
>
> 4. I dislike QSK for many reasons that have been
> discussed before and would much prefer PTT in CW.
> Given that PTT is "impossible", I've learned to live with
> Semi-Breakin (with my QSK capable amp) with QSK
> Delay set to 75-90%, depending on sending speed
> and with EXT T/R Delay set to 75-100% delay.
>
> 5. FYI, the K2 that was tested likely had clicks
> similar to unmodified FT-1000MP's. Elecraft has just
> developed a mod which greatly reduces clicks but I
> doubt that was implemented in the unit ARRL tested.
> Would be interesting to see the modified K2 waveform.
>
> None of my comments really address your question
> regarding the initial dit shortening, but are made FWIW.
>
> 73, Bill W4ZV
>
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