[Elecraft] Amplifier Input Impedance

[Stephen W. Kercel]

Fellow Elecrafters:

Is it possible to measure the input impedance of a linear amplifier by 
using an antenna analyzer (such as the Pal Star) at the input of the 
amplifier in place of the rig?

Would the amplifier input impedance be the same for the very small 
signal that the analyzer generates as it would be for the 80-100 Watt 
drive from the rig?

Is there any risk of damaging the analyzer (i.e., should I put a 
blocking capacitor between the analyzer and the rig?) by attempting the 
measurement?

Thanks,

Steve Kercel
AA4AK