I onvce did a observational study like this with W2JPW who lives 3 miles from
my QTH. We did the test on all bands from 160 to 2 meters using zero gain omni
directional antennas. On 160, with 1500W he was S5. On 80 S9 plus, On 40 S4,
and moderately strong on higher bands except for 17meters where he was very
weak. All the time we were in QSO on a 2 meter 1.5W portable in each of our
basements with rubber antennas. Full quieting each way. By the way on the weak
bands he had no issues with QSO success on them so there wasnt anything
inherently bad about his system.
Pete W2PM
-----Original Message-----
From: W9UCW <W9UCW@aol.com>
To: topband <topband@contesting.com>
Sent: Sat, Sep 24, 2011 11:35 pm
Subject: Re: Topband: Effect of current max not at base of vertical
This may or may not be significant to the discussion. In the 1970's I was
sing a 120 foot insulated base vertical as my main transmit antenna. I had
2,000 feet of #12 copper radials from 90 to 200 feet in length buried
bout 3 inches in the ground surrounding the antenna. It was located near
inooka, Illinois in a wooded rural area.
s an experiment, I asked several friends who were located from one to
welve miles away to record my signal strength at their location each day for
ne month at a specific power of 100 watts of carrier. Then I had my tower
limbing buddy, Jack, W9YF (SK) put a resonator tuned to 1850 on top of the
ertical.
had to modify the base matching system. It had been a shunt coil to
round. It now required a parallel resonant circuit from the base of the tower
o ground with the coax from the rig tapped onto the coil.
hen my friends reported the signal strength they now recorded, it was
rom a half to a full "S" unit more than their original readings. Now that's
ertainly not very scientific, but their comments, assuming all groundwave
eadings, were sure interesting to me.
3, CU on TopBand, Barry, W9UCW
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R RST IS ... ... ..9 QSB QSB - hw? BK
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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