[Elecraft] W2 Question

[Richard Thorpe]

On a particular band I use the K3’s internal antenna tuner to tune the SWR to 1.0-1 or so it says.  I have a W2 attached inline and it reads an SWR of 1.7-1+ for the same setting.  Which is correct? can the W2 readings be adjusted/reconciled with the readings on the K3?  is there a problem?  What is the point of the W2 if its it does not reflect ( no pun intended) the correct readings?

R Thorpe K6CG