[Elecraft] KPA500: How to troubleshoot "distorted audio"

[Jim Hooper]

Hmph.    

My 3 month old KPA500 with my K3 and KAT500 had been giving me “outstanding audio” reports when first put into service.    

But something changed and I don’t know what.  

I am now getting distorted audio when I turn it to operate from standby.    Could not use it for my casual participation in the 7QP QSO party this weekend, and that was disappointing.   

Suggestions on how to troubleshoot?    

73, 
Hoop
K9QJS
San Juan Island, WA