----- Original Message -----
From: "Keith Dutson" <kdutson@sbcglobal.net>
To: <TOWERTALK@contesting.com>
Sent: Tuesday, November 21, 2006 8:13 PM
Subject: Re: [TowerTalk] Orion OR2800P
> You are the 5th to recommend the Big Boy. Guess I need to give Jay a
> call.
I asked the original question and I have the old PST-61 which I believe has
nearly 6,000 inch pounds of torque. The new PST61 has about 2000 inch pounds
of torque while the PST61HD has 6400 inch pounds of torque and 29,000 inch
pounds of holding/breaking force.
It uses 32009X wheel bearings at the top and bottom for load support. Mine
is one of the older ones and I have had to work on it, but I like it.
http://www.rogerhalstead.com/Gears.htm shows how massive they are inside.
The early ones had some faults such as the top seal. I've fixed that on mine
and I understand it's no longer a problem with the newer models with the DC
motor. When I had to rebuild mine Jay was very helpful and considering I
replaced the 4 large bearings as well as the top and bottom seal it was
relatively inexpensive to fix with about $100 total in parts I could have
gotten by just replacing the top bearing, cleaning it out and packing the
whole thing with Lithium grease. However I figured as long as I had it apart
new parts would take very little extra time.
Looking at the photos they appear to have gone with different gears
internally, a new top seal, and a DC motor. It looks like a good set up. I'm
guessing they are still using the same top and bottom bearings which would
support a truck.
They are a bit on the expensive side with the PST61 going for about $1350
and the PST-61DHP at roughtly $2100 USD. OTOH they are rugged. The DHP
version uses the same motor as the PST71 on the PST61 gear housing near as I
can tell.
I wanted to compare the Orion to the older PST61 which I'm using. They
appear to compare favorably but I think for the big stuff I'll stick with
the Prosistel.
I hope to get most everything back together tomorrow. The LMR 600,
connectors, and crimping tools arrived today. I doubt I'm going to get that
much in one day.
Now if I could talk the guy down the road out of the PST-71 for a spare<:-))
OTOH I'm trying to get enough together to buy, or build a legal limit
6-meter amp. Maybe even one for 2-meters. I keep telling the locals that's
what I'm going to use on packet<:-)) I think there's a couple who actually
believe that. With the LMR-600 along with the big antennas on top as well
as the colinear vertical near the top I think it'll do right well as a
gateway running 50 watts.
73
Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com
>
> 73, Keith NM5G
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Chuck O'Neal
> Sent: Tuesday, November 21, 2006 6:42 PM
> To: Bob Maser; K8RI on TowerTalk; TOWERTALK@contesting.com
> Subject: Re: [TowerTalk] Orion OR2800P
>
> Go to this site:
>
> http://www.prosistel.net/home-e/default.html
>
> and on the left there is a rotator comparison link. While this is the
> Prosistel site, the table shows the Orion 2800 along with a bevy of other
> rotators and their specs. For a big antenna, I'd go with the Prosistel
> PST-71 or a prop pitch.
>
> Chuck...K1KW
>
>
>
> ----- Original Message -----
> From: "Bob Maser" <bmaser@tampabay.rr.com>
> To: "K8RI on TowerTalk" <K8RI-on-TowerTalk@tm.net>;
> <TOWERTALK@contesting.com>
> Sent: Tuesday, November 21, 2006 7:15 PM
> Subject: Re: [TowerTalk] Orion OR2800P
>
>
>> Check out this M2 website:
>>
>> http://www.m2inc.com/products/rotors/or28002.html
>>
>> Bob W6TR
>> ----- Original Message -----
>> From: "K8RI on TowerTalk" <K8RI-on-TowerTalk@tm.net>
>> To: <TOWERTALK@contesting.com>
>> Sent: Tuesday, November 21, 2006 7:02 PM
>> Subject: [TowerTalk] Orion OR2800P
>>
>>
>> >I have spent the last hour searching for information on the Orion
>> >OR2800P
>> > rotator. All I found were opinions such as "I like it", "built like a
>> > tank", etc...but absolutely no information on how it's constructed, or
> the
>> > actual mechanics of the thing. I did find one photo of the assembled
> unit
>> > which doesn't even show scale.
>> >
>> > Would some one please describe the insides for me? What do they use
>> > for
>> > load supporting bearings, what kind of gears, are they spur or worm
> gear.
>> > If
>> > worm gear is a single or double reduction. What do they use for a brake
> if
>> > not a dual worm gear?
>> >
>> > If you need parts how long to get them? What kind of service and turn
>> > around
>> > time. Are there any parts that are a long delivery item?
>> >
>> > Are parts readily available for the controllers.
>> >
>> > For me it's not just how well an item works but how well it's supported
>> > and
>> > whether parts are standard and readily obtainable. Standard, readily
>> > obtainable parts is second only to "is the rotator adequate to do the
> job
>> > with a substantial safety margin".
>> >
>> > For large arrays like my system (there are *much* larger systems out
>> > there)
>> > I want the speed to either step up and down or smoothly increase and
>> > decrease at the beginning and end of any movement.
>> >
>> > Roger Halstead (K8RI and ARRL 40 year Life Member)
>> > N833R - World's oldest Debonair CD-2
>> > www.rogerhalstead.com (Use return address from home page)
>> >
>> > _______________________________________________
>> >
>> >
>> >
>> > _______________________________________________
>> > TowerTalk mailing list
>> > TowerTalk@contesting.com
>> > http://lists.contesting.com/mailman/listinfo/towertalk
>>
>> _______________________________________________
>>
>>
>>
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