I have a Butternut vertical that I use with their counterpoise kit. About a 5'
foot square loop of wire held out with two poles that are crossed. I have it on
a short pole clamped to a AC unit. You said a rubber roof. Is it metal
underneath? If so it would make a good counterpoise. If you can not connect
to it direct. A small screen under the antenna may be all you need to couple
to it.
A analyzer would make the butternut much easier to tune. It was a lot of trips
up and down the ladder when I setup my Butternut Vertical
Mike 73, AD6AA
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