[Elecraft] K3 QRPp

[Gary Smith]

assuming a k3 and it is fully loaded;

If I want to operate at say, 1 watt I believe all I have to do is 
adjust the power out and it will go from 100mw to 120W using the main 
antenna 1 or 2.

If that is true, how does one select and use less that that? 

If one uses the BNC out on the transverter board KXV3, how does one 
select this and also adjust the power out & receiving antenna?

Thanks

Gary
KA1J