Mike, That should work just fine. Most folks would put the KAT500 on top of the KPA500, but on top of the K3 will work OK too. 73, Don W3FPR On 4/24/2018 6:15 PM, Mike Murray wrote: > I'm rearranging the station and considering putting the KAT500 on top of my > K3. Will the clearance be adequate for proper cooling airflow thru the K3?