I've had a number of different elevated radial configurations with a 40m
4SQ and from my personal experience the addition of ferrites to the
individual feeds did improve the directional characteristic
significantly. The data is not clear because this is a subjective
observation, and in each case the elevated radial configuration was
improved as well.
When I put the 4sq down to ground level, with on-ground radial fields, I
did not use ferrites on the feedlines - the feedline was buried about 1
inch below ground level. The directional characteristic in this
configuration is excellent as well.
In both configurations there has been a serious coax choke at the hybrid
on the main feedline from the shack.
73/jeff/ac0c
alpha-charlie-zero-charlie
www.ac0c.com
On 23-Jan-19 2:06 PM, Don Moman VE6JY wrote:
On all the 4 squares here (2 on 80 and 1 on 160m) I have both buried and
put ferrites (lots) on all the lines to the individual vertical elements.
With the phasing lines I used there wasn't much excess length after burying
so the ferrite beads were always the plan. The 4 sq's tuned up and
performed as expected and whether the ferrites are enough or not, they
don't have any negative impact. I routinely use them as my primary rx
antenna on both those bands.
73 Don
VE6JY
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