On (20 Mar 97) Charles Moody wrote to All...
 CM> Well I have built my first copper J-pole.  I am quite happy with it.
 CM> Here are the SWR results.
 CM>                                      20w     60w
 CM>                             144.000  1.1     1.4
 CM>                             145.000  1.1     1.3
 CM>                             146.000  1.1     1.2
 CM>                             147.000  1.1     1.1
 CM>                             148.000  1.1     1.1
 CM>                             149.000  1.1     1.1
 CM> I think my cut of 57 1/2 and 19 1/2 should be extended out a bit.
 CM> Being that the lower the frequency, the longer the antenna etc.  I
 CM> Well at 20watts the J-pole is dead flat, but as soon as you get to
 CM> high power the SWRs come up a bit.
 CM> Any ideas to make a J-pole that is more a match at around 145.000?
ANYTHING less than 1.5 : 1 ought to work fine. Chasing a "flat" SWR is
truly an exercise in futility, that is, if the goal is communication.
BTW, SWR is a combined function of the feedline and the antenna, *not*
power level. Your readings indicate either a poor SWR meter or one that
is affected by RF. 0.1 watt or 1500 watts input to a particular
antenna *system* (feedline *and* antenna) should yield exactly the same
SWR.
... Read the docs? Wow, what a radical concept.
--- PPoint 2.00
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