[Elecraft] Fw: Re: K3 QSK

Thu Jun 25 19:46:34 EDT 2009

Hi Willis,
Tnx for the feedback. Interesting. Based on what you say below I took off
the  antenna and turned off the preamp. No thumping. Even with the antenna
off (shorted So-239) and the preamp on I get thumping. Turning the AGC OFF
or ON has no impact. Tried this on 160M and 6M. If the preamp is ON and the
Atten is ON I get thumping.
And I get the same results whether in TEST mode or transmitting. 

73,
N2TK, Tony

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of WILLIS COOKE
Sent: Thursday, June 25, 2009 6:56 PM
To: Elecraft Reflector
Subject: [Elecraft] Fw: Re: K3 QSK

I have a hard time remembering that to get to the reflector I need to add
the address or choose sent to all.  Here is my answer to Toby.  By the way,
I have a hearing loss, but not to bass.  I can't hear anything above about
2700 Hz.  I get SSB fidelity all the time.
Willis 'Cookie' Cooke 
K5EWJ

--- On Thu, 6/25/09, WILLIS COOKE <wrcooke at flash.net> wrote:

> From: WILLIS COOKE <wrcooke at flash.net>
> Subject: Re: [Elecraft] K3 QSK
> To: "Toby Pennington" <toby423 at embarqmail.com>
> Date: Thursday, June 25, 2009, 11:41 AM
> OK Toby, I ran the test.  First
> on six meters where I happened to be sitting when I received
> your message.  I did not hear the thumping, even with
> the side tone turned down to where I could barely hear
> it.  Then I went to 80 meters and I could hear
> it.  My theory is that if the rig is set up so that you
> get significant AGC action from the signal level that is
> present when you are not keying, the AGC will cause a
> thump.  With my normal operation, the only time that I
> hear the thump to an objectionable extent is when I answer a
> CQ and another station that is strong enough that the audio
> level is higher than my side tone or if a QRM station comes
> on in my pass band while I am sending.  In either case,
> I find it a positive characteristic because I want to know
> when these things happen.  I can stop them by turning
> off QSK with a delay of about 0.5 to 0.7 seconds which I
> need for my non-QSK amp, but I don't like to operate that
> way to the point that I now have
>  on order two QSK kits for my two amps from Phil Salas,
> AD5X.
> 
> It is a bit disconcerting to hear the thumps, but it is
> disconcerting to have that loud a competitor in the pass
> band and I want to know it when it happens.
> 
> Willis 'Cookie' Cooke 
> K5EWJ
> 
> 
> --- On Thu, 6/25/09, Toby Pennington <toby423 at embarqmail.com>
> wrote:
> 
> > From: Toby Pennington <toby423 at embarqmail.com>
> > Subject: Re: [Elecraft] K3 QSK
> > To: "WILLIS COOKE" <wrcooke at flash.net>
> > Date: Thursday, June 25, 2009, 11:19 AM
> > 
> > Cookie,   I believe the whole issue revolves
> > around the sidetone monitor. Another thing is hearing
> loss
> > making it hard to hear  lower tones as the thumping
> is
> > in the bass range of the audio spectrum.
> > 
> > This may sound strange but know it is a factor is at
> least
> > one case where one of my friends has hearing loss, 
> and
> > can't hear the thumping. He also sets the monitor up
> fairly
> > loud.
> > 
> > If you could take a little time to test........set
> the
> > sidetone monitor to a lower level than normal,  set
> the
> > AF gain where you always do or slightly higher than
> > normal.  Key the rig using QSK function and
> > listen.  Better still,  push the TEST function on
> > and listen there also.
> > 
> > I am hearing thumping either way,  using and antenna
> > or not.
> > 
> > I am also wondering if there might be some other
> setting
> > which influences the thumping.
> > 
> > Thanks for your input!   Toby  W4CAK
> > 
> > 
> > 
> > ----- Original Message ----- From: "WILLIS COOKE"
> <wrcooke at flash.net>
> > To: "Toby Pennington" <toby423 at embarqmail.com>
> > Sent: Thursday, June 25, 2009 2:01 PM
> > Subject: Re: [Elecraft] K3 QSK
> > 
> > 
> > 
> > For what it is worth, the only time that I hear
> thumping
> > when in QSK is when there is another signal in the
> pass-band
> > that is louder than my side tone. Then I get a thump
> if the
> > other station is transmitting when my receiver opens
> up
> > between elements.  If I send on a quiet band or if I
> > have a narrow enough pass band that it eliminates the
> other
> > signal, I don't have the problem.  I am not sure how
> > the designers could eliminate what I hear, but I can
> by
> > turning the audio gain down some.
> > 
> > Willis 'Cookie' Cooke
> > K5EWJ
> > 
> > 
> > --- On Thu, 6/25/09, Toby Pennington <toby423 at embarqmail.com>
> > wrote:
> > 
> > > From: Toby Pennington <toby423 at embarqmail.com>
> > > Subject: [Elecraft] K3 QSK
> > > To: Elecraft at mailman.qth.net
> > > Date: Thursday, June 25, 2009, 10:27 AM
> > > NO, this is not what is going
> > > on. If the sidetone monitor is turned up to
> > > a good fairly loud position, you will not hear
> the
> > > thumping. IF it is turned to what I would call a
> > > comfortable level for my ears, then the thumping
> > > occurs.
> > > 
> > > It is not dependent on AF gain being set
> excessively
> > > high, but is rather dependent on the monitor
> setting
> > > is relation to the AF gain.
> > > 
> > > Toby W4CAK
> > > 
> > >
> >
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>
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