[Elecraft] KE7X KX3 Book and Configuring: KX3, K3, KPA500, and KAT500

[Mike Hagele AC6JA via Elecraft]

I remember a while back I was asking the same question about using my K2  
and KX3 with my KPA500/KAT500 combo, and Eric responded that the KPAK3AUX 
Optional KPA500 to K3 AUX Cable Set cable should be left  disconnected when 
using another rig besides the K3.
I was debating on using a  DB-15 data switch so I wouldn't have to keep 
plugging/unplugging the  cable.

Mike  AC6JA
 
 
In a message dated 4/22/2014 4:44:58 P.M. Pacific Daylight Time,  
phystad at mac.com writes:

So, is this  normal behavior?  I wasn't expecting any kind of comms between 
the K3 and  the KPA500 that affects the STBY/OPER switching.  It does seem 
that a  power on/off cycle for the KPA500 is required to enable that switch.

Is  this designed to work this way or is this a flaw in the design or maybe 
a  missing mini-feature of configuring two different transceivers with the  
KPA500.  I admit to not scouring all of the documentation yet on the  
expected functionality of the STBY/OPER switch.

73, phil,  K7PEH


On Apr 22, 2014, at 4:14 PM, Don Wilhelm  <w3fpr at embarqmail.com> wrote:

> Phil,
> 
> Let me  get this straight - the KPA500 is communicating with the K3, then 
you switch  to the KX3 and the KPA500 does not talk with the KX3.
> 
> If that  is what is happening, I would expect that to be the case. The 
communications  with the K3 is not synchronized with the attempted 
communications with the  KX3, so a reset (power cycle) of the KPA500 may be required.
> 
>  73,
> Don W3FPR
> 
> On 4/22/2014 7:02 PM, Phil Hystad  wrote:
>> Some follow-up questions:
>> 
>> OK, I  have the KX3 and K3 configured with the KPA500 and KAT500.  
Everything  seems to work with one little exception.
>> 
>> The  exception:
>> 
>>     --- initial conditions,  K3 is on and switched to use the KPA500 and 
KAT500.  KX3 is  off.
>> 
>>     --- using K3 and so on works  fine with amp on or with amp in 
standby.
>> 
>>   --- I turn off K3.  Leave KPA500 on but in STBY  mode.
>> 
>>     --- Switch coax from K3 to  KX3 (1x2 switch).
>> 
>>     --- Turn on  KX3.  KPA500 still in STBY mode.
>> 
>>   --- Attempt to switch KPA500 to OPER from STBY but switch does  not 
work.  If I power off the
>>         KPA500 (front panel switch) and power back on then switch works  
fine.
>> 
>> I have experimented with all kinds of starting  initial conditions and 
order of events but whenever
>> the KPA500 is  left on after using the K3 and then switching to the KX3, 
the switch on the  KPA500
>> to go from STBY to OPER does not work.  I always have  to cycle the 
power from the front panel on/off
>> switch.
>>  
>> 
>  

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