Wayne R Hudson DO wrote:
> Am putti9ng up a KT36XA at 120 ft and am thinking of rotors. The T2X wont
> survive much in Ohio winter and spring winds
>
I went through several of the tail twister type rotators (trashed them)
and two HDR 300s in a matter of about 3 weeks. I'd never use anything
with spur gears and the wedge brake on a sizable antenna load. The winds
were 30 - 40 MPH when I tried to turn the array. I didn't think
something that large could turn that quickly when I released the brake.
The motor didn't have the power to stop the rotation.
> Prositel is too big and cumversome and I worry abt service.
>
The motor position can be adjusted so it'll fit a 45G and larger. The
newer ones are designed a bit differently than my old PST-61and I like
them. They still use a pot in the rotator for position indication.
(actually a portion of a high quality 10 turn pot) Mechanically they
are *relatively* easy to service and the new ones have better seal than
the old ones. http://www.rogerhalstead.com/Gears.htm (I need to finish
the reassembly part on that page) Parts are common and readily
available for the older ones *except* for the large worm gear wheel. I
understand this has been changed. For factory Service? I'd call Array
Solutions to ask. http://www.arraysolutions.com/ . I'd stay away from
the older green models that needed the top seal redesigned and used a
custom worm gear wheel that was difficult to get with long delivery times.
They have a chart that gives comparisons to other rotators and lists the
PST61 as an equivalent to the HDR600 for antenna area. I'd not even
consider the HDR300 to be in the same running with the PST-61with spur
gears and the wedge brake. Actually I'd like to have one of the new
PST-61HDs except for price. OTOH with the mass I have up there it'd
might still be the way to go.
There are a couple of rotators that I'd choose for a large antenna or
antennas such as the array I have up. In addition to the Prosistel
series I'd pick the big
Orion,
( http://www.arraysolutions.com/Products/m2rotators.htm ) also available
from Array Solutions, or the Alpha Spid ( http://www.alfaradio.ca/ )
made in Canada. They were going to come out with a monster version in
addition to their standard.
> Yaesu is questionable. I had one and it worked for less than a yr.are they
> any better now and can you get them fixed in the US
>
Again, last I knew they still use spur gears and I'd stay away from them
for large arrays and "I believe" you can get either the Orion or Alpha
Spid for about the same money.
73
Roger (K8RI)
>
>
> Any ideas
>
>
>
>
> Hud, K5ZG
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|