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Solution to KPA500 Problem

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Ora Smith

Solution to KPA500 Problem

I recently encountered an odd problem which I thought I would share in case anyone else experiences it. My KPA500/KTA500 combo refused to work on 20 meters. It appeared that the amp was not keying, but only on this band. I suspected a problem in the amp, but when I removed the tuner and connected the amp directly to the transceiver everything worked fine. It turned out that the firmware in the tuner was somehow corrupted. I installed the latest firmware into the KTA500 and now everything works FB.

73,

Ora
W9DJ

Ora Smith
[hidden email]

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Kevin - K4VD

Re: Solution to KPA500 Problem

Hi Ora...

I'm confused. You say you removed the tuner and connected the amp directly
to the transceiver?

My transceiver is connected directly to the amp at all times. The tuner is
between the antenna and the amp. Removing the tuner would connect the
antenna directly to the amp (ok if a good, resonant antenna I think).

The tuner should not be placed between the transceiver and the amp.

Did I misread your post maybe? In my mind, it is still very early in the
morning. :)

73,
Kev K4VD

On Mon, May 1, 2017 at 10:47 AM, Ora Smith <[hidden email]> wrote:

> I recently encountered an odd problem which I thought I would share in
> case anyone else experiences it. My KPA500/KTA500 combo refused to work on
> 20 meters. It appeared that the amp was not keying, but only on this band.
> I suspected a problem in the amp, but when I removed the tuner and
> connected the amp directly to the transceiver everything worked fine. It
> turned out that the firmware in the tuner was somehow corrupted. I
> installed the latest firmware into the KTA500 and now everything works FB.
>
> 73,
>
> Ora
> W9DJ
>
> Ora Smith
> [hidden email]
>
>
>
> ______________________________________________________________
> 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]
>

Jim Rhodes-2

Re: Solution to KPA500 Problem

I think he means the control cable. KAT500 comes before KPA500 there and
three tunes has the ability to interpret PTT to the amp.

Jim Rhodes
K0XU

On May 1, 2017 10:06, "Kevin - K4VD" <[hidden email]> wrote:

Hi Ora...

I'm confused. You say you removed the tuner and connected the amp directly
to the transceiver?

My transceiver is connected directly to the amp at all times. The tuner is
between the antenna and the amp. Removing the tuner would connect the
antenna directly to the amp (ok if a good, resonant antenna I think).

The tuner should not be placed between the transceiver and the amp.

Did I misread your post maybe? In my mind, it is still very early in the
morning. :)

73,
Kev K4VD

On Mon, May 1, 2017 at 10:47 AM, Ora Smith <[hidden email]> wrote:

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Kevin - K4VD

Re: Solution to KPA500 Problem

Hi Jim. Yep, Ora caught me offline and put me back on track. It's was a
case of me thinking RF flow and Ora was talking about keying.

73,
Kev K4VD

On Mon, May 1, 2017 at 2:56 PM, Jim Rhodes <[hidden email]> wrote:

> I think he means the control cable. KAT500 comes before KPA500 there and
> three tunes has the ability to interpret PTT to the amp.
>
>
> Jim Rhodes
> K0XU
>
> On May 1, 2017 10:06, "Kevin - K4VD" <[hidden email]> wrote:
>
> Hi Ora...
>
> I'm confused. You say you removed the tuner and connected the amp directly
> to the transceiver?
>
> My transceiver is connected directly to the amp at all times. The tuner is
> between the antenna and the amp. Removing the tuner would connect the
> antenna directly to the amp (ok if a good, resonant antenna I think).
>
> The tuner should not be placed between the transceiver and the amp.
>
> Did I misread your post maybe? In my mind, it is still very early in the
> morning. :)
>
> 73,
> Kev K4VD
>
>
>
> On Mon, May 1, 2017 at 10:47 AM, Ora Smith <[hidden email]> wrote:
>
> > I recently encountered an odd problem which I thought I would share in
> > case anyone else experiences it. My KPA500/KTA500 combo refused to work
> on
> > 20 meters. It appeared that the amp was not keying, but only on this
> band.
> > I suspected a problem in the amp, but when I removed the tuner and
> > connected the amp directly to the transceiver everything worked fine. It
> > turned out that the firmware in the tuner was somehow corrupted. I
> > installed the latest firmware into the KTA500 and now everything works
> FB.
> >
> > 73,
> >
> > Ora
> > W9DJ
> >
> > Ora Smith
> > [hidden email]
> >
> >
> >
> > ______________________________________________________________
> > 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]
> >
> ______________________________________________________________
> 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]
>
>
>