I have reflection transformers at the end of every two wire Beverages
which I try to test by measuring the wires on the feed end. I remove the
transformer from the two wire WD1-A and check the resistance between the
two wires which tells me that through the reflection transformer I have
continuity. It measures about 40 ohms wire to wire, this is done when I
notice any performance change of the antenna. Now come the next test
that baffles me completely. When I measure from either wire to my
ground rods alone, to see what the return resistance is, I get reading
in the vicinity of 20K across the 900 foot run. I understand that if
the reading was very low it would defeat the whole Beverage principle.
But is 20K Ohms reasonable, very good, or marginal? I use three foot
foot rods at either end and when I pull one out yesterday before moving
it the bottom 1/4 was moist and muddy. That Southern end of several
reversible Beverages is located about 100 feet or less from a salt
marsh or salt pond. I also have to such antennas made up of ladder line
a DX Engineering components. They all appear to be working well even
though large grass has reach and covered portion of some of them.
But my question is what is a reasonable or good return ground resistance
for a 600' or 900' Beverage. I haven't found any sources of information
expect the saying that the higher Resistance the better. Is this correct?
Herb Schoenbohm, KV4FZ
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