Hello Leo! > I had the IO-option allready installed on the K2, so I didn't bother to > install the optional cap. in the Aux RF line on the K2 board. > What is it's purpose... Protection in case the RF and AUX PWR cables are accidentally swapped. > ...and is it worthwhile to install it anyway ? I thought it was, opened up my K2, and made the mod. 73, Lyle KK7P