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Surprising Behavior on KX3 KXPA100 Combo

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Phil Hystad-3

Surprising Behavior on KX3 KXPA100 Combo

I have configured my KX3 with my KXPA100 (previously used only with KX2) following all instructions (I think) in the KXPA100 user manual.

First comment — everything works, antenna tuner on KXPA100 works, power out 100 watts on all bands, and so on.

Weird stuff:

1. I Held Keyer/Mic/PWR button for power display, showing 100 watts. Then, I immediately pushed Band+ to switch up to next band. No band switching too place but the display changed from 100 watts on KX3 back to the clock. Pressing Band+ once more results in band switching as expected. This happens every time in the sequence I describe and I am wondering if (a) this is normal, (b) something is not yet configured correctly.

2. My reason for Hold on Keyer/Mic/PWR to display power is because after switching bands and after tuning the antenna for a low SWR (about 1.1:1) the power output was only about 10 watts. I did a Hold on Keyer/Mic/PWR to see the power output and it was indeed 100 watts and not 10. I then keyed down and then the output was 100 watts. This does not seem normal to me.

None of these two behaviors occurred on my KX2.

Any ideas or comments?

73, phil, K7PEH

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Bob N3MNT

Re: Surprising Behavior on KX3 KXPA100 Combo

If you are saying you switched bands with the amp still transmitting, that would probably cause what you are seeing. There is a short delay after switching bands to switch in the new tuner settings. You should give the amp time to complete the changes before transmitting.

Phil Hystad-3

Re: Surprising Behavior on KX3 KXPA100 Combo

No, I certainly did not switch bands while transmitting. I don't think I said that.

PEH's iPhone

> On Aug 23, 2017, at 1:38 PM, Bob N3MNT <[hidden email]> wrote:
>
> If you are saying you switched bands with the amp still transmitting, that
> would probably cause what you are seeing. There is a short delay after
> switching bands to switch in the new tuner settings. You should give the amp
> time to complete the changes before transmitting.
>
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/Surprising-Behavior-on-KX3-KXPA100-Combo-tp7633704p7633706.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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Phil Hystad-3

Re: Surprising Behavior on KX3 KXPA100 Combo

In reply to this post by Phil Hystad-3

My own answer to my first weird thing in message below:

Apparently, if you press/HOLD the Keyer/Mic/PWR button to display the power level, it takes another key press to revert from that action. It was not merely the band switch that would not function but any key press had the same result — which was, that function key did not operate other than to revert the PWR display back to whatever was displayed prior to the press/HOLD on the ../PWR button.

I assume that this might be normal behavior, possibly thinking that most people would depress the same ../PWR button again to move out of that state.

ALSO, clarification on the second weird thing:

To reproduce this behavior of the power output shown one green light on the power LED display of the KXPA100, do the following:

Seems to work this way because I have two antennas, one for 80 thru 30 and the other for 20 thru 10. So,

—> Switch antennas (either Ant 1 to 2 or Ant 2 to 1)
—> Tune using the ATU Tune button.
—> key down once (I send a dash using my paddle)
—> result is only one green LED light lit up on Power LED Display of KXPA100.
—> key down again, same thing, without needing any other button pushes and normal
display of 100 watts is shown on KXPA100 power LED lights.

73, phil, K7PEH

> On Aug 23, 2017, at 12:32 PM, Phil Hystad <[hidden email]> wrote:
>
> I have configured my KX3 with my KXPA100 (previously used only with KX2) following all instructions (I think) in the KXPA100 user manual.
>
> First comment — everything works, antenna tuner on KXPA100 works, power out 100 watts on all bands, and so on.
>
> Weird stuff:
>
> 1. I Held Keyer/Mic/PWR button for power display, showing 100 watts. Then, I immediately pushed Band+ to switch up to next band. No band switching too place but the display changed from 100 watts on KX3 back to the clock. Pressing Band+ once more results in band switching as expected. This happens every time in the sequence I describe and I am wondering if (a) this is normal, (b) something is not yet configured correctly.
>
>
> 2. My reason for Hold on Keyer/Mic/PWR to display power is because after switching bands and after tuning the antenna for a low SWR (about 1.1:1) the power output was only about 10 watts. I did a Hold on Keyer/Mic/PWR to see the power output and it was indeed 100 watts and not 10. I then keyed down and then the output was 100 watts. This does not seem normal to me.
>
> None of these two behaviors occurred on my KX2.
>
> Any ideas or comments?
>
> 73, phil, K7PEH
>
> ______________________________________________________________
> 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]