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Re: [TowerTalk] Prosistel PST-61 or PST-2051

To: "towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] Prosistel PST-61 or PST-2051
From: Al Kozakiewicz <akozak@hourglass.com>
Date: Mon, 7 May 2012 11:57:30 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Based on a quick look, the original poster looks like he's got about 18 sq. ft. 
of wind load on a rotator advertised for "medium-large arrays up to 20 sq. 
ft.".  I'm sure some derating is in order given the ambiguity of the 
specification.

I do find it difficult to believe, however, that a prop pitch rotator system 
costing close to $2000 is the only reliable way to turn an 8 sq ft tribander 
and a 2.5 sq ft VHF beam that together cost less then $1000!

Al
AB2ZY

________________________________________
From: towertalk-bounces@contesting.com [towertalk-bounces@contesting.com] On 
Behalf Of Gene Fuller [w2lu@rochester.rr.com]
Sent: Monday, May 07, 2012 11:35 AM
To: Jim Hargrave; towertalk@contesting.com
Subject: Re: [TowerTalk] Prosistel PST-61 or PST-2051

Yes Jim, and how many missions it had flown before it saw it's first ham use
? My first ppm was still in a wooden crate ready to be shipped back overseas
after having been rebuilt by GE. Another had a complete Curtis Wright
service manual with it, along with a service tech's repair record/notes
including instructions regarding how many allowed, and how to repair, bullet
holes in the prop blades !

As long as they are properly sealed and  lubricated, which guys like Kurt
know how to take of - and/or see his notes, available on line.  The only
thing  I've ever seen to "wear out" are the brushes. And that was probably
because I ran one on AC (now of course DC).

Gene / W2LU

----- Original Message -----
From: "Jim Hargrave" <w5ifp@gvtc.com>
To: <towertalk@contesting.com>
Sent: Monday, May 07, 2012 10:07 AM
Subject: Re: [TowerTalk] Prosistel PST-61 or PST-2051


>I fully support Gene's suggestion.
>
> I have used the same Prop Pitch rotor since the 1960's.
> It had been in use over 10 years when I got it.
>
> For the past 30 years it has faithfully rotated a TH6DXX, and a HyGain 14
> element 2M beam.
>
> I use a modified CDE controller ($15 at a Ham swapfest) with a RotorEZ
> computer interface module.
> I power the rotor motor with a 24v battery charger transformer remote
> mounted at the tower.
>
>
>    73s de Jim
>       W5IFP
>
>  > -----Original Message-----
>  > From: towertalk-bounces@contesting.com
>  > [mailto:towertalk-bounces@contesting.com]On Behalf Of Gene Fuller
>  > Sent: Monday, May 07, 2012 7:29 AM
>  > To: towertalk@contesting.com
>  > Subject: Re: [TowerTalk] Prosistel PST-61 or PST-2051
>  >
>  >
>  >
>  > ----- Original Message -----
>  > From: "Gene Fuller" <w2lu@rochester.rr.com>
>  > To: "Bill Jackson" <k9rz@radiks.net>
>  > Sent: Monday, May 07, 2012 8:27 AM
>  > Subject: Re: [TowerTalk] Prosistel PST-61 or PST-2051
>  >
>  >
>  > > Hi Bill -
>  > >
>  > > I would still vote for the prop pitch motor. They, also, can
>  > be used with
>  > > the Green Heron controller. I believe that Kurt can supply
>  > them with the
>  > > Green Heron box, or it would be a fairly straight forward DIY
>  >  project to
>  > > adapt the motor if you found a PPM someplace else. I would
>  > guess that if
>  > > you got one of Kurt's it would be the last rotator you would have to
>  > > purchase.
>  > >
>  > > And no, I 'm in no way connected to Kurt's business.
>  > >
>  > > Gene / W2LU
>  > >
>  > > ----- Original Message -----
>  > > From: "Bill Jackson" <k9rz@radiks.net>
>  > > To: <towertalk@contesting.com>
>  > > Sent: Saturday, May 05, 2012 9:16 AM
>  > > Subject: [TowerTalk] Prosistel PST-61 or PST-2051
>  > >
>  > >
>  > >> It appears that my Hy-Gain T2X Tailtwister is not going to be large
>  > >> enough for long term survival of my 4 element 20-6M Stepp-IR
>  > stacked with
>  > >> a 2 element 40m Cushcraft 402-CD 12 ft above it.  After only
>  > 6 months of
>  > >> being in the air over a relatively mild winter and only one
>  > day of 50 MPH
>  > >> winds a couple of weeks ago, the T2X rotor is trashed.
>  > Fortunately, I
>  > >> have a second T2X that I put in place to keep me on the air
>  > until I can
>  > >> upgrade the rotor.  I am used to swapping out and rebuilding
>  > rotors every
>  > >> couple of years, but every 6 months or less is not acceptable.
>  > >>
>  > >> I have settled on either the Prosistel PST-61 or the smaller
>  > PST-2051.  I
>  > >> am sure the PST-61 will do the job very nicely, but I am
>  > suffering from
>  > >> sticker shock and was wondering if the PST-2051 would do the job?
>  > >> Comparing specifications between the T2X and the PST-2051, it would
>  > >> appear the PST-2051 is slightly heavier than the T2X, but since
>  > >> manufacturer's specifications are very subjective, is this
>  > really the
>  > >> case?  Would I have enough safety margin with the PST-2051,
>  > considering
>  > >> the overall design of the rotor is completely different than the
> T2X?
>  > >>
>  > >> I am prepared to spend what is necessary to purchase a
>  > reliable rotor,
>  > >> but at the same time I don't want to overspend either.  This
>  > is probably
>  > >> the largest antenna array I will ever put up at this location, so
>  > >> upgrading for future expansion is not really a consideration
>  > >>
>  > >> l would appreciate some real word experience, as it is often
>  > better than
>  > >> relying on manufacturer's specifications.
>  > >>
>  > >> Thanks and 73
>  > >>
>  > >> de Bill, K9RZ
>  > >> _______________________________________________
>  > >>
>  > >>
>  > >>
>  > >> _______________________________________________
>  > >> TowerTalk mailing list
>  > >> TowerTalk@contesting.com
>  > >> http://lists.contesting.com/mailman/listinfo/towertalk
>  > >
>  >
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