KT34A is a good little antenna. Have had several.
But you can't put 6' of mast above a rotor.
You're asking for trouble, I'm afraid.
Consult your rotor manual, but I'd bet that putting the
beam much than 1' above the rotor will prove to be out
The antenna is not going to be particularly effective at
27'. I'd recommend you put some energy into finding a
4 sections of rohn 25g housebracketed, and a 10' mast would
be about right, as a minimum.
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