I believe the Prosistel design was changed in the last year or so. The
version I have (about 8 months old) has the motor sticking straight out from
the rotor housing, at right angle to the axis of rotation. In my case, I had
to remove one of the horizontal braces to allow the motor to clear in my
Heights 14" face width top section. If I had it to do over, I would have
used an 18" face width top section. The strength of the tower was not
compromised since the rotor plate, mounted just below the motor, effectively
replaced the horizontal brace.
Bob, W5LT
-----Original Message-----
From: Stone, Gary R. [mailto:Gary.Stone@va.gov]
Sent: Monday, January 08, 2007 1:20 PM
To: K8RI on TowerTalk; TOWERTALK@contesting.com
Subject: Re: [TowerTalk] Rotor Selection Advice Wanted - Heavy Duty
The ProSisTel I used fit my Rohn45. I think they used to have the motor
repositioned but not any longer. But I have no idea for other towers.
Gary, N5PHT
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of K8RI on TowerTalk
Sent: Monday, January 08, 2007 12:47 PM
To: TOWERTALK@contesting.com
Subject: Re: [TowerTalk] Rotor Selection Advice Wanted - Heavy Duty
Will the ProSisTel fit if the motor is repositioned?
I had to reposition the motor to get it to fit into the ROHN45.
Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com
Subject: Re: [TowerTalk] Rotor Selection Advice Wanted - Heavy Duty
>I have a MonstIR that I am putting on an HDX5106. I am going
> to use the M2 rotator that I got with the tower. If it breaks,
> I am going to replace it with a prop pitch. The ProSisTel will
> not fit into my tower. Probably not even a 689. Neither will
> the large Alfa Spid, and the smaller one is not strong enough.
> AFAIK, there are no other alternatives, unless you want to mount
> a ProSisTel or large Alfa on top of the tower. Then the rotor
> has to take all that extra stress, or you have to build a
superstructure
> on top of the tower with a bearing above the rotor.
>
> Rick N6RK
>
>
>
>
>
> Stone, Gary R. wrote:
>> Hi,
>>
>> I have the ProSisTel, the model (number escapes me - but it is the
one
>> rated for 39 sq feet). I have been happy with it for the time I have
>
>> WARC7 about 12 feet about the Optibeam). I would not (personally)
>> recommend the M2 Orion rotator (went thru 3 of them).
>>
>> Gary Stone, N5PHT
>>
>
>> I have a Steppir Monstir antenna (Love it by the way).
>>
>> It has a Wind Surface Area of 23.9 square feet.
>
>>
>> The rotor will be mounted in a US Towers 589 or 689 as soon as I can
>> purchase a used one (any leads on this would also be appreciated!).
>>
>> 73,
>>
>> Bill Erickson
>>
>> N6MXU
>> _______________________________________________
>
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
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