A word of warning about the PST61...
The PST61 looks man enough to turn most large antenna systems, BUT, that
large and strong look is let down by what you cant see...
The main body of the rotator is well built, and, in principle, would turn a
house :-)
The main body is fastened (bolted) to the lower casting (that bolts to your
tower) using only FOUR 1/4 inch machine screw, yes.. that's not a typo...
1/4 inch machine screws. The casting has no other locating pins, or
interlocking castelations... So, please have that in mind when you buy your
rotator for your large antenna system....
I have pictures of my PST61 once it had failed here:
http://gd0tep.com/pst61/PST61.htm (and how i fixed it)
The control unit main transformer is (in my opinion) under rated if your
turning a large antenna... Where I am, the local contest group has 6
prosistel rotator, a mix of PST61, PST51 and PST2051, and we've had FOUR
transformer failures, after the first unit failed a second time, we pulled
the 100va transformer and fitted a 150va.
The prosistel design is a great idea, that in my opinion is poorly
implemented.
73
Andy
http://gd0tep.com
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Bill Jackson
Sent: 05 May 2012 13:16
To: towertalk@contesting.com
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
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