[Elecraft] K3 - why SWR change with an amplifier

[Jorge Diez - CX6VM]

Hi,

 

I noticed that SWR change in my K3 if I use the amp or if it´s in standby.

 

For example in my 20 mts yagi, the SWR with the antenna direct to the K3 is
1.5:1.

 

If I put the antenna through he amplifier, in STBY the SWR is 1.5:1 but with
the aomlifier is in Operation the SWR is 2.0:1

 

Thanks,

Jorge

CX6VM/CW5W

K3 #4077