[TowerTalk] rotor comparisions

[Roger Huntley]

I have a new 2800 and the first one had to be sent back to the factory
because it took 20 seconds to turn 15 degrees and made a loud hum in the
receiver when it turned.  It took several telephone calls and before they
would give me a return number, even had to play it so he could hear it on
the telephone.  I had to pay freight back for a brand new defective unit.
Fortunately I bench tested it before it went up the tower.

The second one turns great, but still makes a noise in the radio when it
starts and stops, especially on 40 mtr.  M2 has not been responsive to
complaints about that.  It does turn a C31XR and 402CD beautifully.

I have never used the PST 61 but it does sound interesting except for the
comments about installing it.



-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com]On Behalf Of k2qmf at juno.com
Sent: Friday, March 26, 2004 08:01 AM
To: tower at rogerhalstead.com
Cc: k9kl at direcway.com; TowerTalk at contesting.com
Subject: Re: [TowerTalk] rotor comparisions



The M2 OR-2800 is a great rotator.
Just Check the specs.  Also, service from
M2 is outstanding...

73,  Ted  K2QMF

P.S. - Make sure you get the new version with the
          green readouts..   Has all the updates.


On Thu, 25 Mar 2004 22:09:55 -0500 "Tower (K8RI)"
<tower at rogerhalstead.com> writes:
>
> Oops... You also asked why.
>
> The PST-61 is rugged, requires no brake and has no play.
>
> The HDR 300 requires a brake, the brake switching is really odd ball
> in that
> you have to manually turn off the brake and then turn the antenna.
> The
> output shaft turns relatively easy with the brake off.  Turning the
> brake
> off in high winds means the antennas are going to weather vane
> "right now".
> Then at the least you have to dismantle the rotor and get it back
> between
> the limit switches.
>
>
> > Which is better and why?M2 2800 or whatever they call it
> now,Prosisteil
> > PST-61 or Hy-Gain HDR-300.Looking for a stout rotor to turn some
> big
> stacks
> > of uhf beams in a high wind area.I have a PST-51 up there now but
> I keep
> > shearing off the "pin" bolt and I don't want to put a bigger one
> in and
> then
> > break the rotor.Plus I think the bolts that hold the rotor plate
> to the
> > rotor are getting stretched which means it can turn 20 dergrees or
> so back
>
> Fix the bolts and you won't be shearing off the other bolt.  Those
> rotor
> plate bolts have to be solid.  Mine is keyed and bolted to the shaft
> with 4
> bolts in the plate.  Any play in the system puts a tremendous load
> on not
> only the rotor, but the whole tower when it comes up against the
> stop.
>
> I have on the order of 300# worth of masting plus a TH-5 at 100
> feet, 7L C3i
> at 115 feet, and 2 11-L  440s  and 2 12-L 144s on a 14 foot cross
> boom at
> 130 feet.  70 MPH plus winds a couple weeks back caused the mast to
> slip
> about 10 degrees in the mount, but nothing broke. I just have to go
> back up
> and realign things.
>
>
> > and forth and then that puts a lot of torque on the "pin" bolt and
> then
> ping
> > it breaks.The "pin" bolt is grade 5 3/8*4 with a grade 5 cap
> screw.It does
> > indeed break as to just getting lose and then fall off.  Gregg
> K9KL
>
> It only takes a few degrees of play to shear bolts in winds far less
> than
> the system design.
> I had mine shear off some 5/16 ths stainless pins in the mast.
> Reamed the
> holes and put in 3/8ths (tight fit).  I think I got those sizes
> right.  I
> haven't been up there since late last Summer.
> >
>
> Roger Halstead (K8RI, EN73 & ARRL Life Member)
> N833R, World's Oldest Debonair (S# CD-2)
> www.rogerhalstead.com
> >
> > _______________________________________________
> >
> > See: http://www.mscomputer.com  for "Self Supporting Towers",
> "Wireless
> Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041
> with any
> questions and ask for Sherman, W2FLA.
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk at contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com  for "Self Supporting Towers",
> "Wireless Weather Stations", and lot's more.  Call Toll Free,
> 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
>

________________________________________________________________
The best thing to hit the Internet in years - Juno SpeedBand!
Surf the Web up to FIVE TIMES FASTER!
Only $14.95/ month - visit www.juno.com to sign up today!
_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.

_______________________________________________
TowerTalk mailing list
TowerTalk at contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk