[Elecraft] KPA1500 / K3 Mystery

[Bob Wilson, N6TV]

Bruce,

What is the firmware version of your KPA1500?  2.48 is the latest.  There
was also a change in version 2.38, almost a year ago, that could fix the
issue for you:

02.38 11/4/2019 (Production 12/3/2019)
⦁ Switch to STBY if BAND CHANGE->STBY is enabled and the frequency (from
XCVR or TX count) is below the amp's frequency range
⦁ Wait longer after band change to inform K3 that KPA1500 has switched to
STBY when BANDCHANGE->STBY is YES

73,
Bob, N6TV


On Sun, Oct 18, 2020 at 9:30 AM <ockmrzr at gmail.com> wrote:

> YES, when switching the KPA1500 between OPER and STBY, the K3 displays the
> messages "KPA500 OPERATE" and "KPA500 STANDBY", depending.
>
>
>
> YES, the K3 is set CONFIG: POWER SET is Per Band.
>
>
>
> YES, when in STBY on the KPA1500, I set the "no amp" power to 100 watts,
> and
> when in OPER, I set drive level per band; usually less than 30 watts, which
> gets close to the legal limit.
>
>
>
> Still the same results as described below.
>
>
>
> 73 de Bruce, N7TY
>
> Yuma, AZ
>
>  <http://www.qsl.net/n7ty> www.qsl.net/n7ty
>
>
>
> From: ockmrzr at gmail.com <ockmrzr at gmail.com>
> Sent: October 18, 2020 06:32
> To: 'elecraft at mailman.qth.net' <elecraft at mailman.qth.net>
> Subject: KPA1500 / K3 Mystery
>
>
>
> I made a recent change to the "Band Change-> STBY" setting on the KPA1500,
> changing from NO to YES.  I did this to ensure the AMP doesn't have any
> wild
> SWR or PWR spikes before the ATU has a chance to "remember" it's setting
> after a band change.
>
>
>
> Issue:  When switching the AMP from OPER to STBY, the K3 is supposed to
> switch from the drive power setting (~25 watts) in OPER, to 100 watts in
> STBY, it does not, it remains at the drive power setting.  I am 99% sure I
> have all the cabling and settings set correctly in the K3 and KPA1500.  I
> went through and manually reset the power settings on each band to let the
> K3 and KPA1500 "re-learn" the change made, however, still no joy.
>
>
>
> Jim, W6YA, and I have been going back and forth, however neither of us have
> had any luck.
>
>
>
> Do you KPA1500/K3 owners out there have any ideas or suggestions?
>
>
>
> 73 de Bruce, N7TY
>
> Yuma, AZ
>
> www.qsl.net/n7ty <http://www.qsl.net/n7ty>
>
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to n6tv at arrl.net
>