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KX2 80m LSB bug

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Irma & Linas(LY2H)

KX2 80m LSB bug

Hello group,

I am now a proud owner of the brand new KX2 which arrived few days ago
straight from CA. Being also a proud owner of an old and fully upgraded K3
I found this little rig very familliar to operate and navigate. Very lovely
package of all what you need on QRP, including the battery pack and the key
paddle! I am especially amased by the built-in microfone - it works very
nicely and I am re-descovering the SSB mode being mainly the CW op! The RX
audio quality of SSB signals is outstandingly pleasant even with this
small speaker! The general sensitivity of the receiver though seems a bit
too low compare to the K3 thus the preamp is needed most of time even with
good antennas. But that is no problem.

A strange bug appears to live in the radio. It only related to 80m band LSB
mode. It is not possible to get the signal transmitted if you are on 80m on
power-up or if you come to 80m LSB from another band. Pushing Xmit or mics
PTT puts the rig into transmit mode but RF meter shows no output. If you
want to transmit, you have to change the mode into CW, transmit a dot or so
( it always works on CW ok ) then change back to the LSB mode and then only
it starts transmitting your SSB signal out. The bug is NOT related with the
" RF in the shack" case, it is there with different antennas and the dummy.
The bug is permanently there and does not depend on battery supply,
voltage, etc. I have also tried to reload the latest firmware , no change.
So I think it could be the firmware problem.

Would be interesting to know if anybody else experiencing the same strange
effect?

72! de Linas LY2H
KX2 #1488
K3 #1568 S-upgraded
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wayne burdick

Re: KX2 80m LSB bug

Administrator

Hi Linas,

I can't duplicate this problem on my KX2. I would suggest re-doing the transmit gain calibration on 80 meters.

Set mic gain to about 15-20 with the MH3, or about 30-50 with the internal mic.

73,
Wayne
N6KR

On Mar 13, 2017, at 7:14 AM, Irma Linas <[hidden email]> wrote:

> Hello group,
>
> I am now a proud owner of the brand new KX2 which arrived few days ago
> straight from CA. Being also a proud owner of an old and fully upgraded K3
> I found this little rig very familliar to operate and navigate. Very lovely
> package of all what you need on QRP, including the battery pack and the key
> paddle! I am especially amased by the built-in microfone - it works very
> nicely and I am re-descovering the SSB mode being mainly the CW op! The RX
> audio quality of SSB signals is outstandingly pleasant even with this
> small speaker! The general sensitivity of the receiver though seems a bit
> too low compare to the K3 thus the preamp is needed most of time even with
> good antennas. But that is no problem.
>
> A strange bug appears to live in the radio. It only related to 80m band LSB
> mode. It is not possible to get the signal transmitted if you are on 80m on
> power-up or if you come to 80m LSB from another band. Pushing Xmit or mics
> PTT puts the rig into transmit mode but RF meter shows no output. If you
> want to transmit, you have to change the mode into CW, transmit a dot or so
> ( it always works on CW ok ) then change back to the LSB mode and then only
> it starts transmitting your SSB signal out. The bug is NOT related with the
> " RF in the shack" case, it is there with different antennas and the dummy.
> The bug is permanently there and does not depend on battery supply,
> voltage, etc. I have also tried to reload the latest firmware , no change.
> So I think it could be the firmware problem.
>
> Would be interesting to know if anybody else experiencing the same strange
> effect?
>
> 72! de Linas LY2H
> KX2 #1488
> K3 #1568 S-upgraded
> ______________________________________________________________
> 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]

Irma & Linas(LY2H)

Re: KX2 80m LSB bug

Thanks Wayne!
Calibration helped. Problem solved!
Greate rig!

73 de Linas LY2H

On 2017 kov. 13, pr at 18:30 Wayne Burdick <[hidden email]> wrote:

> Hi Linas,
>
> I can't duplicate this problem on my KX2. I would suggest re-doing the
> transmit gain calibration on 80 meters.
>
> Set mic gain to about 15-20 with the MH3, or about 30-50 with the internal
> mic.
>
> 73,
> Wayne
> N6KR
>
>
> On Mar 13, 2017, at 7:14 AM, Irma Linas <[hidden email]> wrote:
>
> > Hello group,
> >
> > I am now a proud owner of the brand new KX2 which arrived few days ago
> > straight from CA. Being also a proud owner of an old and fully upgraded
> K3
> > I found this little rig very familliar to operate and navigate. Very
> lovely
> > package of all what you need on QRP, including the battery pack and the
> key
> > paddle! I am especially amased by the built-in microfone - it works very
> > nicely and I am re-descovering the SSB mode being mainly the CW op! The
> RX
> > audio quality of SSB signals is outstandingly pleasant even with this
> > small speaker! The general sensitivity of the receiver though seems a
> bit
> > too low compare to the K3 thus the preamp is needed most of time even
> with
> > good antennas. But that is no problem.
> >
> > A strange bug appears to live in the radio. It only related to 80m band
> LSB
> > mode. It is not possible to get the signal transmitted if you are on 80m
> on
> > power-up or if you come to 80m LSB from another band. Pushing Xmit or
> mics
> > PTT puts the rig into transmit mode but RF meter shows no output. If you
> > want to transmit, you have to change the mode into CW, transmit a dot or
> so
> > ( it always works on CW ok ) then change back to the LSB mode and then
> only
> > it starts transmitting your SSB signal out. The bug is NOT related with
> the
> > " RF in the shack" case, it is there with different antennas and the
> dummy.
> > The bug is permanently there and does not depend on battery supply,
> > voltage, etc. I have also tried to reload the latest firmware , no
> change.
> > So I think it could be the firmware problem.
> >
> > Would be interesting to know if anybody else experiencing the same
> strange
> > effect?
> >
> > 72! de Linas LY2H
> > KX2 #1488
> > K3 #1568 S-upgraded
> > ______________________________________________________________
> > 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]
>
>

Bob N3MNT

Re: KX2 80m LSB bug

In reply to this post by Irma & Linas(LY2H)

If you hit tune after switching to 80M does it still appear to exhibit this issue?