What caught my eye was the way they mounted the trust bearing on the
crank-up mast. Looks like three solid rods that connect the rotor mount
plate to the thrust bearing plate....taking the side moment stress off the
rotor housing. That has always been a concern for mast users who didn't
want to rotor the entire tower from the base fixture. Pretty novel
implementation.
73,
dave
wa3gin
----- Original Message -----
From: "Mike" <nf4l@nf4l.com>
To: "jim Jarvis" <jimjarvis@optonline.net>
Cc: <towertalk@contesting.com>
Sent: Friday, April 18, 2008 10:01 PM
Subject: Re: [TowerTalk] Ultrabeam
>I *REALLY* want to see the 4el 6-80!! Not that I could afford the
> antenna, or the land it would shade.
> 73
> Mike NF4L
>
> jim Jarvis wrote:
>> Looks for all the world like a contravention of the SteppIR patent,
>> although I haven't
>> researched it to be sure. There appear to be some mechanical
>> improvements over
>> the Mertel brothers' design, but an awful lot is simply a copy.
>>
>> There is flattery, and then there is thievery. The question is
>> whether there's enough
>> money at stake for the Mertels to challenge this ripoff.
>>
>> Curiously, I still have my engineering notebook from 1975, signed
>> and witnessed,
>> which describes this antenna. The moving elements were the easy
>> part. Control was
>> the economic block. It was the availability of PIC controllers
>> which made it
>> feasible as a commercial product.
>>
>> I suppose if one could go to the trouble of creating a replica of a
>> dead sea scroll, or
>> the shroud of Turin, one could create an engineering notebook
>> documenting prior
>> design and protection under italian law. Or, maybe it really exists.
>>
>> One certainty: At EU1600, I'm not buying one!
>>
>> N2EA
>>
>>
>> Jim Jarvis, MBA
>> President-Executive Coach
>> The Morse Group, LLC
>>
>> People-Process-Strategy
>> Achieving Results in a Changing World
>> www.themorsegroup.biz
>> coach@themorsegroup.biz
>>
>>
>>
>> _______________________________________________
>>
>>
>>
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>> TowerTalk@contesting.com
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>>
>>
>
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