[EMAIL PROTECTED] wrote: > > What is the proper adjusting procedure for using a Johnson Matchbox ant > tuner..There are two controls..tuning and Matching...Which is adjusted first? > tnx
That is a darn good question. Unfortunately there are no darn good answers. It depends on the antenna and what is being matched. I use a Johnson Matchbox. I find that I need to twiddle both knobs while watching the SWR indicator to get a decent match. The knob on the left of my matchbox varies the coupling. The knob on the right does the actual tuning. I start by setting the knob on the left to its far left position, then swing the knob on the right until I see a change in reflected power. If I don't see much of a change, I move the knob on the left a little and swing the right knob again. It helps to have the band switch in the proper place. Once you see the reflected power drop, turn both knobs simultaneously for a more significant drop. Do all this at the lowest possible power level. A level that will give an adequate meter indication. That is the way I do it. Sort of a 'twist all the knobs possible' until you see a drop in reflected power. If you never get to the point where there is a drop in reflected power, your antenna impedance may not be of a value that the box can match. Regards, Frank Kamp
