One more note about the AR-22.
As I recall from decades ago,
it only has 4 (yes, FOUR) ball bearings
per race, held on place by a plastic ring
of some sort. Definitely LIGHT DUTY !
Tom N4KG
On Thu, 2 Jan 2003 07:42:52 -0800 Steve Katz <stevek@jmr.com> writes:
> Jon,
>
> It does sound as though the rotor is binding in one direction. Make
> sure
> the load above the rotor is very balanced; any amount of imbalance
> when an
> AR-22 is used without a thrust bearing will make it practically stop
> -- it
> doesn't have nearly the torque of a CD-45 or HAM-M type.
>
> Also, the AR-22 servo control system does not work well if the rotor
> is used
> for small incremental changes in direction. Remember, these were
> inexpensive rotors (I bought several brand new in 1966-67 for
> $39/each,
> complete with the control box) intended to turn TV antennas that
> were not
> highly directional; it was normal to crank the rotor 45 degrees or
> more at a
> time, to favor TV signals from another city. It would have been
> extremely
> rare for anyone to need to turn their TV antenna only two or three
> "clicks"
> (12-18 degrees) at a time, as from practically nowhere are cities
> this close
> together.
>
> If you need to turn the rotor only 12 degrees (two "clicks" worth of
> rotation), it is best to crank it ten clicks forward, then eight
> clicks
> back. That accomplishes the 12 degrees of desired rotation without
> stressing the sytem beyond what it can handle.
>
> It was very common, even with brand new AR-22's, that if you used
> the rotor
> to make 1-2-3 "click" adjustments, after doing so the indicator
> would be
> quite far off. That was normal, and I don't recall any known fix
> for this
> -- it's inherant in the design.
>
> The AR-22 is not the greatest choice for highly directional
> antennas, no
> matter how lightweight they may be.
>
> WB2WIK/6
>
> "If everything seems under control, you're just not going fast
> enough." -
> Mario Andretti
>
> > -----Original Message-----
> > From: Jon Ogden [SMTP:na9d@speakeasy.net]
> > Sent: Wednesday, January 01, 2003 4:17 PM
> > To: Randy Wing; towertalk@contesting.com
> > Subject: Re: [Towertalk] AR-22 Rotor Control Box Question
> >
> > on 1/1/03 4:30 PM, Randy Wing at rwing@southwind.net wrote:
> >
> > > Jon,
> > >
> > > I oversimplified. What I meant to add to this was that there is
> an
> > > adjustment on the CDE for correcting for incorrect amounts of
> slew.
> > >
> >
> > No, I've not done that. I have no instruction manual. How do you
> do
> > that?
> >
> > Also, the rotor seems to turn faster in one direction (clockwise)
> than in
> > the other (CCW). The "clicks" come a lot slower. Is it possible
> that I
> > am
> > binding a little bit in one direction?
> >
> > Thanks,
> >
> > Jon
> >
> > -------------------------------------
> > Jon Ogden
> > NA9D (ex: KE9NA)
> >
> > Citizen of the People's Democratic Republik of Illinois
> >
> > Life Member: ARRL, NRA
> > Member: AMSAT, DXCC
> >
> > http://www.qsl.net/na9d
> >
> > "A life lived in fear is a life half lived."
> >
> >
> > _______________________________________________
> > AN Wireless Self Supporting Towers at discounted prices,
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> _______________________________________________
> AN Wireless Self Supporting Towers at discounted prices,
> See http://www.mscomputer.com
>
> Wireless Weather Stations now $349.95. Call Toll Free,
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