[Elecraft] KPA500 PWR Display

Thu Dec 27 15:08:09 EST 2012

Ken;

My fault. My description was a bit foggy. When you tap a band button, it changes the display parameter to the band/frequency. The request goes to the K3, which then changes the band, as indicated on the BAND0..3 lines. The KPA receives this, briefly displays the band, then goes back to displaying the current parameter, which is the band. You don't perceive the momentary display since it is the same as the normal display, set when the band button was tapped.

If the frequency is changed without a band button being tapped, when the KPA sees the band change it performs the same actions, except the original display (for example, HV) will be displayed after the momentary band display. The tap of the band button in the first scenario is what caused the display parameter to be changed.

I hope this makes more sense…

Jack B, W6FB

On Dec 27, 2012, at 11:31 AM, Ken K3IU <kenk3iu at cox.net> wrote:

> Actually, Jack, on my KPA500 when I change the band by tapping a band button on the KPA, the display shows the band information, but does NOT return to what was being displayed before tapping the band button. When I change bands from the K3, what you describe below does happen; i.e., a momentary display of the new band info and then the display goes back to whatever was displayed before, e.g., PWR, SWR, CURRENT, etc.
> 
> To clarify, I don't have any problem with the way it works now. I just didn't follow things as you were describing them  :-) . 
> 
> Happy New Year...
> 73, Ken Wagner K3IU
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> On 12/27/2012 1:53 PM, Jack Brindle wrote:
>> Taking a peek at the code I see you are right. The second tap of each parameter actually does change back to the band display. I remember it used to be the way I described it, but I bet that was a long time ago before the initial release. So I stand corrected.
>> 
>> So now I'll go back to the original post and add some description. Whenever the band changes, it will be momentarily displayed, then the LCD will return to the original display. This is true even if the original display was the band - you just don't see it since it changes back to itself. Is the request then that tapping a band button actually not change the display to show frequency/band other than the momentary display? If so, what would happen when the KPA is used with a transceiver other than the K3 (i.e. any of the other three RADIO choices)? Is there then ever a time when tapping a band button would cause the LCD to change to showing the band instead of some other parameter? One problem with such a change is that it would not longer be intuitive as to how to display the band - think of it, tap the button for the current parameter to show the band?
>> 
>> Interesting...
>> 
>> Jack B, W6FB
>> 
>> On Dec 27, 2012, at 10:21 AM, Ken K3IU <kenk3iu at cox.net> wrote:
>> 
>>> Hello, Jack:
>>> 
>>> Mine doesn't work that way at all. On s/n 108 with firmware 1.18, if I have PWR selected and tap HV, I see the HV on the display. If I tap HV again, it then displays the band that I am on, not the PWR. If I tap the HV button, the HV is displayed. If I then tap the CURRENT button, the current will be displayed. If I again tap the CURRENT button, the display shows the band info, not the HV.
>>> 
>>> 73,
>>> Ken K3IU
>>> ~~~~~~~~~~~~~~~~~~~~~~~~
>>> On 12/27/2012 1:00 PM, Jack Brindle wrote:
>>>> Tapping a button on the KPA500 causes the parameter associated with that button to be displayed. Try tapping the HV button, you will see the voltage displayed on the LCD. Tap HV again and you get the previous parameter displayed. Thus tapping a band button causes the band to be displayed. To illustrate why this is important, try the following: tap the HV button. The HV will be displayed. Next tap the CURRENT button. The LCD will change to current. Now tap the Current button again. The LCD will change to HV, not to the band. At this point the only way to get to the band is to tap a band button.
>>>> 
>>>> Thus this is actually the correct behavior. How would you have it behave differently? In other words, what would you change to get the behavior you would like?
>>>> 
>>>> Note that when changing the band from the transceiver the LCD will momentarily display the new band, then will go back to whatever parameter you have selected.
>>>> 
>>>> Jack Brindle, W6FB
>>>> 
>>>> 
>>>> On Dec 27, 2012, at 9:07 AM, AC6JA at aol.com wrote:
>>>> 
>>>>> I like to have the KPA500 display set to constantly show the PWR  output.
>>>>> I just noticed that when I swtich bands from my K3, the KPA500 display  
>>>>> stays set to display PWR output, but when I switch bands on the KPA500, the  
>>>>> display always goes back to display the band.  Then I always have to press  
>>>>> PWR again to display the PWR output.
>>>>> Is there any way to keep the KPA500 display "stuck" on PWR output when  
>>>>> changing bands directly from the KPA500 keypad?
>>>>> 
>>>>> Mike
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> 