[Elecraft] Wide Bandwidth CW Signals

[jim]

Don,

I agree with one of your statements in ref to the code being proprietary.
In ref to the second statement, Elecraft could have developed a menu option
(just like Yaesu and Icom) so the end used could change the shaping to suit
their "needs".  Elecraft chose not to as it can only get worse as it relates
of spectrum purity.  The out of box menu defaults by Yaesu and Icom provide
for a poor transmit spectrum, and can be made worse if the end user desires
to.

My efforts to alert other operators of their poor CW spectrum are met
responses to "Why does it matter" to some that are unaware the adjustment is
available.  When I do alert others about their wide signal, I include a
reference to K6XX and K9YC articles, in addition to signals that utilize the
spectrum more efficiently.

Most respones to my emails are to "take a leap",  to all the way to the
other end of the curve  that one user sent his radio (FT-100MP) to get it
fixed.

The market will dictate how the mfg'ers will respond to cleaning up the
spectral purity.  It took decades for them to improve the receive side of
the equation.  Short of the FCC mandating an improved spectral purity (It is
already implemented on the marine side of their business segment), it will
take the end market voting with their wallets and buying equipment that have
better spectral purity.

Take a listen to the CWops Mini-CWT Test on May 14, 2015 at 03:00z to 04:00z
(note the date and time is in UTC) and listen on 40m to a relatively packed
band.  Use a receiver that is better than an SX-28 and you will quickly be
able to pick up signals that are full of key clicks, and those that are
wide.  Having a P3 makes it all the easier to see these poor xmitters.  The
available spectrum IS limited, and inferior equipment makes band utilization
poor.  We are very quick to complain about someone on SSB being too wide,
with splatter, inter-mod, etc. but we are somewhat muffled when the issue
relates to CW.

Maybe if the market was more informed on the performance (or lack of) of the
equipment they are using, a change for the better can be effected.

Jim
W6AIM




-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Don
Wilhelm
Sent: Sunday, May 10, 2015 4:02 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Wide Bandwidth CW Signals

Jim,

At the risk of answering a rhetorical question, I would say that the reason
Elecraft declined to give access to the code for the CW wave-shaping is
two-fold.
First is that the DSP code is Elecraft proprietary.
Second is that they do not want anyone "messing" with the code that now
provides a clean response to the CW waveshape.  The K3 reputation for a
clean signal is at stake.

73,
Don W3FPR

On 5/10/2015 6:49 PM, jim wrote:
> Elecraft was asked to have the ability to have access to the code that
> performs wave shaping function in their rigs.  Elecraft declined to offer
> this, and for a reason.
>
> Can you guess what that reason was?
>

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