Elecraft

K3 Output

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Ric Porter

K3 Output

After 5 months use my K3 has developed an output problem. The output varies
on tune or key down. If it is set on 100 watts, say on 20 meters, the out
put will start at 65 watts. It then goes up to 110 and settles at 100
watts. All this is in a span of about two seconds. It does the same at five
watts, or any power. It does the same on any antenna. It is ok at 1 mil
through the two meter transverter. There is no device between the K3 and the
different antennas. The variation is greater at the higher frequencies but
does occur on all bands.

Ric
AA4SC

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Ian Maude

Re: K3 Output

Ric Porter wrote:
> After 5 months use my K3 has developed an output problem. The output varies
> on tune or key down. If it is set on 100 watts, say on 20 meters, the out
> put will start at 65 watts. It then goes up to 110 and settles at 100
> watts. All this is in a span of about two seconds. It does the same at five
> watts, or any power. It does the same on any antenna. It is ok at 1 mil
> through the two meter transverter. There is no device between the K3 and the
> different antennas. The variation is greater at the higher frequencies but
> does occur on all bands.
>
First thing I would do is check it into a dummy load Ric. Does it still
do it then? If so, try reloading the firmware and make sure you rewrite
the tables. See if that helps.

73 Ian

--

Ian J Maude, G0VGS
SysOp GB7MBC & HB9DRV-9 DX Clusters
Member RSGB, GQRP, FISTS
K2 #4044 |K3 #455
http://www.amateurradiotraining.org

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K7TV

Re: K3 Output

In reply to this post by Ric Porter

I have never noticed slow variations in output during normal operations on
my K3. However, the other day I installed the external ALC mod. During the
testing step I connected and disconnected a 9 V battery with a series
resistor. It took a couple of seconds for the K3 output to change. Seems
like another reason not to actually hook it up to the amplifier.

73,
Erik K7TV

----- Original Message -----
From: "Ric Porter" <[hidden email]>
To: <[hidden email]>
Sent: Monday, May 04, 2009 4:58 AM
Subject: [Elecraft] K3 Output

> After 5 months use my K3 has developed an output problem. The output
> varies
> on tune or key down. If it is set on 100 watts, say on 20 meters, the out
> put will start at 65 watts. It then goes up to 110 and settles at 100
> watts. All this is in a span of about two seconds. It does the same at
> five
> watts, or any power. It does the same on any antenna. It is ok at 1 mil
> through the two meter transverter. There is no device between the K3 and
> the
> different antennas. The variation is greater at the higher frequencies
> but
> does occur on all bands.
>
> Ric
> AA4SC
>
> ______________________________________________________________
> 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
>

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K5DNL

Re: K3 Output

In reply to this post by Ric Porter

I also have found that the K3 ALC response
time appears too slow to be useful.
Maybe it can be fixed in Firmware.
I going to disable it until it is fixed.

73 Ken K5DNL
--------------------------------------------

--- On Mon, 5/4/09, Erik N Basilier <[hidden email]> wrote:

> From: Erik N Basilier <[hidden email]>
> Subject: Re: [Elecraft] K3 Output
> To: "Ric Porter" <[hidden email]>, [hidden email]
> Date: Monday, May 4, 2009, 12:18 PM
> I have never noticed slow variations
> in output during normal operations on
> my K3. However, the other day I installed the external ALC
> mod. During the
> testing step I connected and disconnected a 9 V battery
> with a series
> resistor. It took a couple of seconds for the K3 output to
> change. Seems
> like another reason not to actually hook it up to the
> amplifier.
>
> 73,
> Erik K7TV
>
> ----- Original Message -----
> From: "Ric Porter" <[hidden email]>
> To: <[hidden email]>
> Sent: Monday, May 04, 2009 4:58 AM
> Subject: [Elecraft] K3 Output
>
>
> > After 5 months use my K3 has developed an output
> problem. The output
> > varies
> > on tune or key down. If it is set on 100 watts,
> say on 20 meters, the out
> > put will start at 65 watts. It then goes up to
> 110 and settles at 100
> > watts. All this is in a span of about two seconds. It
> does the same at
> > five
> > watts, or any power. It does the same on any
> antenna. It is ok at 1 mil
> > through the two meter transverter. There is no device
> between the K3 and
> > the
> > different antennas. The variation is greater at
> the higher frequencies
> > but
> > does occur on all bands.
> >
> > Ric
> > AA4SC
> >
> >
> ______________________________________________________________
> > 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
> >
>
>
> ______________________________________________________________
> Elecraft mailing list
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>