Hi Paul:
Your measured impedence drops with the radials detached because there is less
loss in the system. With an extensive radial system, your impedence should
drop to the vicinity of 32 ohms with a quarter wave, lossless radiator.
I would be more interested in how the radial system is impacting field
strength than in how it is impacting impedence. You can always design and
install a
matching network at the feedpoint to achieve an impedence match between your
feedline and the antenna. What you want to do with you radial system is
increase field strength. When you've done the best you can with your radial
system, given wire and space available, measure the resulting impedence and
match to
it if necessary. Don't build the radial system to acheive some desired
impedence.
73, Jim W9TM
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Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
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