Hi Dave,
Back in the 1960's my best friend's dad was W3ANO in Allentown, PA. He had a
mast going through the peak of the roof as you propose, with a TA33 or similar
trapped tribander on it. No rotor though. The mast went through the ceiling on
the 2nd floor and he had fashioned a brake of some sort and a steering wheel on
the bottom of the mast in the hallway next to the radio room. He would reach up
to turn the steering wheel to adjust the beam heading, then lock it down!
You will need a rubber boot where the mast enters the roof to keep water out.
Rohn does have a couple of short top sections:
https://www.3starinc.com/rohn_25g_antenna_rotor_and_bearing_accessory_shelf_r-bas25g
or https://www.3starinc.com/rohn_25g_top_cap_thrust_bearing_plate_r-bpl25g
Maybe a bit pricey for your purposes. Any cut-off straight section with two
accessory shelves would serve the same purpose.
I have a couple of used top sections with rotor plates in my stockpile if you
are interested.
73/Jon
Jon P. Zaimes, AA1K
Tower climber for hire
Felton, Delaware
http://www.aa1k.us/
Cell: 302-632-2353
Reviews of AA1K tower work on eham website:
http://www.eham.net/reviews/detail/12922
Hug your favorite tower every day, and always stay connected to it.
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