As far as I know, the consensus seems to be that there isn't too much
difference in performance between the TH-7 and the KT34XA, in spite of
the fact the the KT34XA has a longer boom. Perhaps others are
aware of evidence to the contrary, though. One clear difference is
that it takes a lot longer to assemble the KT34XA from scratch, because
you have to assemble all the tuning stubs. That may not be a problem
if you can leave the elements partly assembled between field days. Either
would certainly be durable enough for your purposes.
73,
Scott Ellington K9MA
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