[TowerTalk] HDBX

[Tom Mandera]

> Message: 4
> Date: Tue, 6 Dec 2011 21:24:26 -0500
> From: "David Jordan" <wa3gin at comcast.net>
> Subject: Re: [TowerTalk] HDBX-48 figures for 90 mph zone
> To: "David  Thompson" <thompson at mindspring.com>,
> 	<towertalk at contesting.com>
> Message-ID: <D3697610D173417B95FAF4652955CB61 at usercf18>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> 	reply-type=original
>
> There is a 40 yr old HDBX-48 at  wa3gin in as new condition... reason
> being
> the rotor is bolted to the concrete base and steel pipe runs up the middle
> of the tower through the trust bearing and up five feet in the air where
> the
> tri-bander is mounted.  No twist on the tower this way ;-)

I have a 40' HDBX that I bought second hand from a SK.  It came with the
Sommer XP708 beam on top, which exceeds the boom-length restriction, but
is under the 18sq ft 70mph rating.  Fortunately, the package also included
the 40+' of mast and the PST51 rotator bolted to a plate that stands off
of, but is bolted to, the concrete and installed as you describe.  (This
keeps the rotator from sitting the snow too much)

The rivets were in good shape when I re-erected the tower at my QTH.