[TowerTalk] Fw: Short Top Section for Attic Installation

[Gene Smar]

I also wanted to copy the list.
73 de Gene Smar AD3F 

Sent from my Radio Shack TRS-80 model 100 laptop 
 
   ----- Forwarded Message ----- From: "Gene Smar" <ersmar at verizon.net> To: "Mike Smith VE9AA" <ve9aa at nbnet.nb.ca> Cc:  Sent: Tue, Apr 21, 2026 at 3:22 PM Subject: Re: [TowerTalk] Short Top Section for Attic Installation  I'd been thinking about the same issues. Instead of ice on it, what if the steel boom gets hot in the summer sun and the rubber boot adheres to it? When the mast turns the boot might rip, or at least wear a bit, allowing water in. PVC vent pipes don't rotate and don't have this problem. 
Putting the rotator outside and above the roof penetration would eliminate this problem. The rotator would need a "lower mast support", which would block you from feeding the coax and control wires up through the mast.
It is puzzlement.
73 de Gene Smar AD3F 

Sent from my Radio Shack TRS-80 model 100 laptop 
 
  On Tue, Apr 21, 2026 at 3:00 PM, Mike Smith VE9AA via TowerTalk<towertalk at contesting.com> wrote:   I find these antenna discussions fascinating.

 

Mechanicals aside, how would you weather -and- insect proof such an affair?

 

In my neck of the woods, I'd also be worried about it icing up, then turning
it and (unknowingly) ripping the weather proof barrier/boot or roofing
shingles all apart.

Secondarily, how would you replace the "rubber boot" (or whatever) down the
road?

 

Many years ago now, in CQ or QST magazine there was a mobile VHF contest op
who had a system like this...mast through the roof of his van(?) and the
rotor inside on the van floor (I think).    Maybe someone recalls the
details.

 

As Artie Johnson (1960-70's TV show-"Laugh in") used to say : "Very
interesting"

 

GL

 

Mike - Keswick Ridge, NB, Canada 

 

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