Elecraft

K3 QSK

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Tobyp

K3 QSK

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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Steve Ellington

Re: K3 QSK

What exactly kind, model of speaker are you using?
Steve
N4LQ
[hidden email]
----- Original Message -----
From: "Toby Pennington" <[hidden email]>
To: <[hidden email]>
Sent: Thursday, June 25, 2009 1:27 PM
Subject: [Elecraft] K3 QSK

> 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
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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N2TK

Re: K3 QSK

In reply to this post by Tobyp

Toby,
You are correct. If I have the monitor set above about 35 there is no
thumping. If I set it down to about 12, where it usually is, there is
thumping. Tried it with the internal speaker, external Kenwood SP-850 and
Heil headphones.

73,
N2TK, Tony

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Toby Pennington
Sent: Thursday, June 25, 2009 1:27 PM
To: [hidden email]
Subject: [Elecraft] K3 QSK

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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Joe Planisky

Re: K3 QSK

In reply to this post by Tobyp

Does turning off AGC have any effect on the thumping?

73
--
Joe KB8AP

On Jun 25, 2009, at 10:27 AM, Toby Pennington wrote:

> 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
>
> ______________________________________________________________
> 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

AC7AC

Re: K3 QSK

In reply to this post by N2TK

CONTENTS DELETED

The author has deleted this message.

Merv Schweigert

Re: K3 QSK

I also cannot duplicate this on #2603, I run the audio at 12 all the time,
if I set it at 9 or below I have almost no audio out. I use amplified
speakers.
Audio at 12, RF also about 12.
The monitor at 50, no thumps. monitor at 12 no thumps, the background
atmospheric noise is louder than the monitor at 12 and makes it sound
perhaps strange between cw characters, but no thumps. Stock here also
with no mods.
Merv KH7C

> I can't duplicate it here at any combination of settings. So something's
> different about or K3s.
>
> Mine is "stock" Elecraft.
>
> Have you made any of the mods being suggested to increase the low-frequency
> audio response (bigger coupling caps, etc.?)
>
> Ron AC7AC
>
> -----Original Message-----
> Toby,
> You are correct. If I have the monitor set above about 35 there is no
> thumping. If I set it down to about 12, where it usually is, there is
> thumping. Tried it with the internal speaker, external Kenwood SP-850 and
> Heil headphones.
>
> 73,
> N2TK, Tony
>
> -----Original Message-----
> 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
>
>
> ______________________________________________________________
> 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
>
>

N2TK

Re: K3 QSK

In reply to this post by Joe Planisky

No, the AGC has no effect one way or the other.

So far it seems reducing the audio level below about 9 o'clock or reducing
the RF gain below about 1 o'clock or increasing MON above about 35
significantly reduces the thumping on both K3's here.

As I said earlier it is not a major issue, but would be nice to eliminate.
The three conditions found so far to eliminate the thumping are not
practical from an operating point of view.

Maybe I don't have something set up properly?

73,
N2TK, Tony

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Joe Planisky
Sent: Thursday, June 25, 2009 3:29 PM
To: Toby Pennington
Cc: [hidden email]
Subject: Re: [Elecraft] K3 QSK

Does turning off AGC have any effect on the thumping?

73
--
Joe KB8AP

On Jun 25, 2009, at 10:27 AM, Toby Pennington wrote:

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N2TK

Re: K3 QSK

In reply to this post by AC7AC

The only audio mod made to both rigs deals with the cap change on the corner
of the main board. Also, you don't need to be transmitting. You can hear the
thumping in the TEST mode.

73,
N2TK, Tony

-----Original Message-----
From: Ron D'Eau Claire [mailto:[hidden email]]
Sent: Thursday, June 25, 2009 3:30 PM
To: 'N2TK'; 'Toby Pennington'; [hidden email]
Subject: RE: [Elecraft] K3 QSK

I can't duplicate it here at any combination of settings. So something's
different about or K3s.

Mine is "stock" Elecraft.

Have you made any of the mods being suggested to increase the low-frequency
audio response (bigger coupling caps, etc.?)

Ron AC7AC

-----Original Message-----
Toby,
You are correct. If I have the monitor set above about 35 there is no
thumping. If I set it down to about 12, where it usually is, there is
thumping. Tried it with the internal speaker, external Kenwood SP-850 and
Heil headphones.

73,
N2TK, Tony

-----Original Message-----
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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AC7AC

Re: K3 QSK

CONTENTS DELETED

The author has deleted this message.

w4nhj

Re: K3 QSK

Tony

I ran my K3 through your test and I have the thumps also. If I switch to
Simi the thumps go away, but if I turn the delay down to 2, 1 , 0 the
thuumps reappear. I do not have to turn my AF gain up very far to begin
hearing the thumps. At my normal listining level they are quite noticable.
It appears this problem may only exist in newer K3s. MY SN; 3121.

Frank - W4NHJ

----- Original Message -----
From: "Ron D'Eau Claire" <[hidden email]>
To: <[hidden email]>
Sent: Thursday, June 25, 2009 7:54 PM
Subject: Re: [Elecraft] K3 QSK

>I sat down in TEST mode and tried all the combinations you mentioned again
> and can't produce thumps. I even tried every possible combination of AF/RF
> and MON levels with no thump.
>
> So I'm sri to say obviously something is different between our rigs and
> setups, but I can't imagine what.
>
> The only audio mod involving a change on the main board is to change a
> choke, not a cap. It reduces the resistance of the choke to improve the
> voltage regulation at the AF Amp. I've made that too. When I said my K3
> was
> "stock" Elecraft, it does have the Elecraft-approved and documented mods
> made while writing the app notes.
>
> I asked wondering if the capacitor changes some have made to improve the
> low-frequency response were making the low frequency 'thumps' stronger and
> audible. If you've not done them, we should have similar rigs.
>
> Ron AC7AC
>
> -----Original Message-----
>
> The only audio mod made to both rigs deals with the cap change on the
> corner
> of the main board. Also, you don't need to be transmitting. You can hear
> the
> thumping in the TEST mode.
>
> 73,
> N2TK, Tony
>
>
> ______________________________________________________________
> 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