[Elecraft] KAT100 - Reluctant to come on, K2 often displays "not inst"

[Bill Coleman]

Yes, I have a cable that has the PowerPole connections to the K2/100, and a separate coaxial jack for the KAT100.

I switch the power supply on, which means the KAT100 has power, then switch the K2/100 on, which powers up the combo.

So, yeah, I have power applied to the KAT100 before the K2.

> On Aug 5, 2018, at 4:39 PM, Jerry Ford <n0jrn1 at gmail.com> wrote:
> 
> Hi Bill:         The K2 / KAT100  has a strange start up procedure you have to follow or the KAT100  will do strange things like you describe
> 
> You have to apply power to the KAT100  before you apply power to the K2.     IF you start the K2 first,  you get all kinds of strange things going on. 
> 
> I have my KAT100 in a separate enclosure and on a separate power supply.   I forget to start the KAT100 first at times and it does some of the
> same things your seeing.
> 
> Hope this helps.  
> 
> 73         Jerry      N0JRN
> 
> On Sun, Aug 5, 2018 at 3:29 PM, Bill Coleman <aa4lr at arrl.net> wrote:
> OK, I have a K2/100 (#2548) connected to a KAT100. 
> 
> As of late, the KAT100 has been reluctant to turn on. I turn on the K2, and it comes up right away, but the LEDs of the KAT100 often stay off for 20-30 seconds, then come on. 
> 
> When the KAT100 finally turns on, it often isn’t tracking lo-hi power, as I can rotate the power knob freely from <10 watts to >11 watts, and the KAT100 will stay stuck at a power level, usually low power. 
> 
> Also, if I try to change antennas, or tune, I’ll get a “not inst” message. 
> 
> This situation persists for a while. If I let the rig warm up for about 15-20 minutes, I can eventually get the K2 to recognize the KAT100. I may have to cycle the power a half dozen times.
> 
> I’ve verified with a scope that the KAT100 is getting the 12CTRL power immediately from the K2, and the internal power on the 5V regulator comes up immediately. It just seems to take it’s sweet time waking up.
> 
> I think the fundamental problem may be that the KAT100 isn’t responding to AUXBUS messages at the right point in the power-up sequence, so the K2 assume it’s not installed. 
> 
> Would appreciate any suggestions on how to troubleshoot this. 
> 
> 
> Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
> Web: http://boringhamradiopart.blogspot.com
> Quote: "Not within a thousand years will man ever fly!"
>             -- Wilbur Wright, 1901
> 
> ______________________________________________________________
> 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 n0jrn1 at gmail.com
> 

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901