I bought a used A50-6S 6 meter beam in Dayton, the antenna is complete and is now assembled. I have some trouble to get the antenna resonant, I think it is because I don't have a dimension for the "Reddi-Match". The tuning strap was/is not at the correct place. I am looking for the "SET" dimension as stated on page 5 of the manual. Thanks, Will K6ND