The earlier KXV3 is fine for the P3. (The KXV3a added internal transverter connections for the K144XV). No other options are required. 73, Eric _..._ David Ferrington, M0XDF wrote: > Eric, can you remind us what is required in the K3 to run the P3, I have an original KXV3 > 73 de M0XDF, K3 #174 >