Elecraft

CW rise time setting

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N4ZR

CW rise time setting

Will the K4 have options for setting CW rise and fall times, not just
TXDELAY like the K3?

--
73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

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k6dgw

Re: CW rise time setting

I really hope the answer is "No." Rise/Fall times and waveshape of the
RF envelope should be tailored by the mfr for the best signal, not
adjustable.

73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 6/7/2020 6:35 PM, N4ZR wrote:
> Will the K4 have options for setting CW rise and fall times, not just
> TXDELAY like the K3?
>

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wayne burdick

Re: CW rise time setting

Administrator

In reply to this post by N4ZR

> N4ZR wrote:
>
> Will the K4 have options for setting CW rise and fall times...?

Hi Pete,

Probably not. We've always been very careful to ensure our rigs have an exceptional clean, click-free CW signal. (Third-party testing bears this out.) Minimizing the bandwidth requires a very specific rise/fall time and a hand-crafted sigmoidal shaping function in DSP.

Colonel Sanders closely guards his fried chick recipe, Mrs. Fields won't reveal what's in her chocolate-chip cookies, and only selected firmware monks--sworn to secrecy--are privy to Elecraft's keying envelope coefficients :)

73,
Wayne
N6KR

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Bob McGraw - K4TAX

Re: CW rise time setting

Thanks Wayne for the excellent and exceptional clean keying.

73
Bob, K4TAX

Sent from my iPhone

> On Jun 7, 2020, at 8:49 PM, Wayne Burdick <[hidden email]> wrote:
>
>
>>
>> N4ZR wrote:
>>
>> Will the K4 have options for setting CW rise and fall times...?
>
> Hi Pete,
>
> Probably not. We've always been very careful to ensure our rigs have an exceptional clean, click-free CW signal. (Third-party testing bears this out.) Minimizing the bandwidth requires a very specific rise/fall time and a hand-crafted sigmoidal shaping function in DSP.
>
> Colonel Sanders closely guards his fried chick recipe, Mrs. Fields won't reveal what's in her chocolate-chip cookies, and only selected firmware monks--sworn to secrecy--are privy to Elecraft's keying envelope coefficients :)
>
> 73,
> Wayne
> N6KR
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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David Gilbert-2

Re: CW rise time setting

In reply to this post by wayne burdick

Thank you. I'd be really disappointed if the keying waveform for the K4
was made adjustable. I consider the fact that it is not adjustable on my
K3 to be one of its best features.

On Sun, Jun 7, 2020 at 6:49 PM Wayne Burdick <[hidden email]> wrote:

> > N4ZR wrote:
> >
> > Will the K4 have options for setting CW rise and fall times...?
>
> Hi Pete,
>
> Probably not. We've always been very careful to ensure our rigs have an
> exceptional clean, click-free CW signal. (Third-party testing bears this
> out.) Minimizing the bandwidth requires a very specific rise/fall time and
> a hand-crafted sigmoidal shaping function in DSP.
>
> Colonel Sanders closely guards his fried chick recipe, Mrs. Fields won't
> reveal what's in her chocolate-chip cookies, and only selected firmware
> monks--sworn to secrecy--are privy to Elecraft's keying envelope
> coefficients :)
>
> 73,
> Wayne
> N6KR
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

N4ZR

Re: CW rise time setting

In reply to this post by wayne burdick

Good!

73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

On 6/7/2020 9:45 PM, Wayne Burdick wrote:

David Box-2

Re: CW rise time setting

In reply to this post by wayne burdick

Glad to hear that we can count on the K4 maintaining the excellent CW
characteristics. I frequently will look at signals I am receiving
measuring the transmitted waveform based on what I see on the P3 and it
never ceases to amaze me about how different brands can be identified
based on the waveform shape and spectral width, not to mention the
audible key clicks.

de Dave K5MWR

On 6/7/2020 20:45, Wayne Burdick wrote:

>> N4ZR wrote:
>>
>> Will the K4 have options for setting CW rise and fall times...?
> Hi Pete,
>
> Probably not. We've always been very careful to ensure our rigs have an exceptional clean, click-free CW signal. (Third-party testing bears this out.) Minimizing the bandwidth requires a very specific rise/fall time and a hand-crafted sigmoidal shaping function in DSP.
>
> Colonel Sanders closely guards his fried chick recipe, Mrs. Fields won't reveal what's in her chocolate-chip cookies, and only selected firmware monks--sworn to secrecy--are privy to Elecraft's keying envelope coefficients :)
>
> 73,
> Wayne
> N6KR
>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>