>From your earlier with the tuner and amp not switching, I would connect the 
>cable ACC direct to the amp from the radio.  If the amp switched then issue is 
>with the tuner. If the amp doesn't switch this points to the radio. 

Recheck all of your CONFIG settings in the radio. 

Looks like a call to Elecraft is in order. 

Bob, K4TAX


Sent from my iPhone

> On Jun 2, 2019, at 9:31 AM, Paul Ecker <[email protected]> wrote:
> 
> Bob - checked all the cables - all tigh and well seated. Still same problems
> 73 Paul w2eck
> 
> 
> 
> 
> 
> 
> 
> 
> *Paul:I would check the cables to be sure they are correctly seated
> and secured for the ACC buss from the radio to the ATU and KPA500. It
> maybe that the radio is not sending the commands to the ATU and then to
> the KPA500.I followed the drawing in the KAT500 manual, Figure 1 on page
> 5.73Bob, K4TAX*
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