[Elecraft] KPA500 Question re the K3s per band power control

[Nels Anderson]

I reported this same issue way back in May when I first got my KPA500, 
but at the time there were so few amps out there that no one really 
cared. I still think it's a bug, but I was told my Elecraft that it was 
intended to work that way.

73 Nels K1UR


On 8/13/2011 6:24 PM, John E. Reiser wrote:
> Yes, that much works here too.
>
> What doesn't work is setting the KPA500 MENU: BAND CHG to STBY and expecting
> that the power out from the K3 will reliably switch to higher power whenever
> the amp is in STANDBY mode, both whether invoked by the button on the amp or
> by simply changing bands on the K3, and then reliably dropping to an
> appropriate lower level whenever the amp is put  in OPERATE mode by tapping
> the operate/standby button on the amp.
>
> Whew!  I got it all into one sentence.  With 300+ KPA500s out there, am I
> the only one to observe this?  Come on guys, can't anyone test this for me
> with their setup?  How about it W4TV?
>
> 73, John, W2GW
>
>
> ----- Original Message -----
> From: "D Joyce"<d_joyce at sympatico.ca>
> To: "Elecraft List"<elecraft at mailman.qth.net>
> Sent: Saturday, August 13, 2011 5:19 PM
> Subject: Re: [Elecraft] KPA500 Question re the K3s per band power control
>
>
>> Just to bring everyone up to date on the problem I reported last evening -
>> doing the K3 Config:Power Set -->  per band (as suggested by Ken K3IU)
>> fixed
>> the problem.  Band control works from either the K3 or the KPA500 and K3
>> power settings are rememberd for all bands.  Works slick.
>>
>> 73,  Doug
>>
>> ----- Original Message -----
>> From: "D Joyce"<d_joyce at sympatico.ca>
>> To: "Elecraft List"<elecraft at mailman.qth.net>
>> Sent: Friday, August 12, 2011 11:41 PM
>> Subject: [Elecraft] KPA500 Question re the K3s per band power control
>>
>>
>>> Group:  I'm checking out a recently completed KPA500 (#234) running FW
>>> V1.11 with a K3/10 running FW Ver 4.36.   The K3/100 with which it will
>>> eventually be used is otherwise tied up and I wanted to confirm the the
>>> per-band power control feature when used with the K3.  (I'm using the AUX
>>> interface cable.)
>>>
>>> It doesn't seem to work as described in the KPA500 Owner's Manual Rev B -
>>> see page 9 Item 4 under Transmitting.  If I put the Amp in Standby and
>>> set
>>> the K3 for 5 W as a low power level and then turn the Amp to Operate and
>>> run the K3 up to a drive level of about 8 W to produce about 100 Watts
>>> from the KPA500, then when I turn the Amp back to Standby the power level
>>> is 8 W not 5W.
>>>
>>> Perhaps the per-band power control is dependent on using a K3/100 not a
>>> K3/10.
>>>
>>> Anyone else seeing the same thing?
>>>
>>> 73,  Doug  VE3MV
>>>
>>>
>>>
>>>
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