I bypass it, Harry. Might want to use the K3/100 barefoot, afterall. Phil W7OX On 2/19/15 4:33 PM, Harry Yingst via Elecraft wrote: > I was wondering what others do when they add the KPA500 and they have the KAT3. > Do most just bypass it , or remove it and put the KANT3 module back in? > Thank you >