The practical side of assembling, building, erecting and tuning beams
that are mounted on non-crank-up/down towers presents a problem. You get
the thing all assembled per the design/manual, take it all the way to
60, 70, 80, or even 180ft with the help of several local OM's, put it on
the analyzer and voila', the "tuning" is off a little. You could beg all
your help to stay, go thru the procedure of getting it back down the
tower and adjusting, then back up, etc....maybe just to do it all over
again....ad infinitum (maybe I could be a lawyer)......
So my question is, what are the REASONABLE limits, say, if you have a 3
element beam (monobander? tribander?), of adjusting only the driven
element length (which you can usually get to on top of the tower)and not
diminish the ability of the antenna to achieve what it's supposed to?
...The point being that you are not going to touch the length of the
reflector or director....(Yes, this was questioned after K5MR repaired
his full-size 3 element 40M at 170ft and it was 'off' a little, we did
NOT want to take that thing down...)
Comments appreciated......73...Ron
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