Elecraft

Re: Poor CW note waveform resolved

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Chuck Chandler

Re: Poor CW note waveform resolved

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Dave Sublette-2

Re: Poor CW note waveform resolved

Well don't leave us in suspense! What was it?

K4TO

On Mon, Apr 27, 2020 at 10:09 AM Chuck Chandler <[hidden email]>
wrote:

>
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Chuck Chandler

Re: Poor CW note waveform resolved

In reply to this post by Chuck Chandler

Apparently one of my email clients is sending something the list won't
accept.

Here's my earlier email, hope it makes it!

Well, I finally figured out why I was seeing a sausage-shaped waveform on
the P3. I looked very carefully at the photo of a CW waveform shown in the
P3 manual and tried to duplicate it exactly. I had been using the Spectrum
and waterfall displays, so I disabled the waterfall display. The waveform
looked better. Then I read the time scale at the bottom of the picture in
the manual – mine was way off. Mine had been set at the default setting
for Mod Scale of 25. In order to duplicate the picture in the manual I had
to increase this to 100. That gave me the identical spacing of marks and
value (10 mSec/mark) as in the picture.

Once I did that, my displayed waveform looked identical to those in the
manual. So, one problem solved… or perhaps resolved is a better word, as
there is no indication the waveform was ever actually soft.

Still a little more work to do on the CW sounding a little off at QRO QRQ.
I’ll adjust the HV tap to bring full-load HV back up above 60V and see if
that takes care of it.

Many thanks for all the help and advice.

73 de Chuck, WS1L

On Mon, Apr 27, 2020 at 9:08 AM Chuck Chandler <[hidden email]>
wrote:

> Well, I finally figured out why I was seeing a sausage-shaped waveform on
> the P3. I looked very carefully at the photo of a CW waveform shown in the
> P3 manual and tried to duplicate it exactly. I had been using the Spectrum
> and waterfall displays, so I disabled the waterfall display. The waveform
> looked better. Then I read the time scale at the bottom of the picture in
> the manual – mine was way off. Mine had been set at the default setting
> for Mod Scale of 25. In order to duplicate the picture in the manual I had
> to increase this to 100. That gave me the identical spacing of marks and
> value (10 mSec/mark) as in the picture.
>
>
>
> Once I did that, my displayed waveform looked identical to those in the
> manual. So, one problem solved… or perhaps resolved is a better word, as
> there is no indication the waveform was ever actually soft.
>
>
>
> Still a little more work to do on the CW sounding a little off at QRO
> QRQ. I’ll adjust the HV tap to bring full-load HV back up above 60V and
> see if that takes care of it.
>
>
>
> Many thanks for all the help and advice.
>
>
>
> 73 de Chuck, WS1L
>
> ================
> Chuck Chandler
> [hidden email]
> ================
>
>
>
> *From: *Chuck Chandler <[hidden email]>
> *Sent: *Sunday, April 26, 2020 7:47 PM
> *To: *Dick Dievendorff <[hidden email]>
> *Cc: *Andy Durbin <[hidden email]>; [hidden email]
> *Subject: *Re: [Elecraft] Poor CW note more testing and a question
> (rather long-ish...)
>
>
>
> My EXT ALC menu is set to the default of OFF t-40. The soft waveform is
> displayed on the P3 apparently the same shape whether the amp is in use or
> standby.
>
>
>
> 73,
>
>
>
> Chuck, WS1L
>
>
>
> On Sun, Apr 26, 2020 at 19:36 Dick Dievendorff <[hidden email]> wrote:
>
> External ALC is enabled on the K3 and K3S with a menu entry that defaults
> to
> OFF. See page 29 of the K3S owner's manual.
>
> 73 de Dick, K6KR
>
> -----Original Message-----
> From: [hidden email] <[hidden email]>
> On
> Behalf Of Andy Durbin
> Sent: Sunday, April 26, 2020 17:20
> To: [hidden email]
> Subject: Re: [Elecraft] Poor CW note more testing and a question (rather
> long-ish...)
>
> "In general, ALC between an amp and a rig is a recipe for clicks and
> splatter. Most authorities advise against using it. This is not new -- it's
> in the manual for Ten Tec legal limit amps from the late '70s and for every
> amp I've owned since."
>
> The OP has a KPA500 and K3S interconnect by an Elecraft AUX cable. This
> means that ALC is connected (Aux cable pin 15) and opens the possibility
> that it is not configured correctly. What I don't know is whether
> incorrectly configured ALC could cause the reported problem. I suspect
> that
> would depend on the time constant(s) of the ALC loop.
>
> 73,
> Andy, k3wyc
>
>
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>
> --
>
> Sent from Gmail Mobile Chuck Chandler [hidden email]
>
>
>

--

===================
Chuck Chandler
[hidden email]
===================
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