[TowerTalk] OR-2800 motor.. DC vs AC ?

[Pete Smith]

Let me second the motion.  My Yaesu rotators use DC motors, and I have 
occasionally run them up against the stops and kept the power applied 
(not intentionally), literally for hours at a time.  I believe that an 
AC motor would be toast after that, but the DC jobs appear to be 
idiot-proof.

73, Pete N4ZR

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On 3/3/2010 7:55 AM, Dick Hanson wrote:
> Hi Jim....
> I am presently using 4 of the DC versions for my rotating towers.
> Instead of the M2 controllers tho, I am using the Green Herons.
>
> Jeff at Green Heron convinced me that the DC motor is the overwhelming
> choice for rotor control.
> I did not get into the 'why' part, but figured since he was a major
> contester and designer of things electrical and mechanical that his advice
> might bode well for me.
>
> Since my rotators are at the bottom of my towers and because I am using PVC
> weatherproof boxes for joining the rotor pigtails to my shack control cable,
> the length of the pigtails are/were entirely satisfactory.
>
> Best,
> Dick, K5AND
>
> -----Original Message-----
> From: towertalk-bounces at contesting.com
> [mailto:towertalk-bounces at contesting.com] On Behalf Of Jim Thomson
> Sent: Wednesday, March 03, 2010 6:48 AM
> To: towertalk at contesting.com
> Subject: [TowerTalk] OR-2800 motor.. DC vs AC ?
>
> I have 2 of these  OR-2800  rotor's.  The original one has the AC motor, and
> has never been used.
> The 2nd one I bought used, and am 99%  sure it has the DC motor in it.
>
> I Dunno if the 2 x mating controller's  are  interchangeable or not ?    I
> like the pulse width modulated
> motor control feature.. you can slow it right down to a crawl.   If the 2 x
> controller's  are not interchangeable,
> I'm sure the green heron controller  will handle either the DC or AC motor ?
>
>
> The idea here was I only require one rotor on the new tower, and the  2nd
> OR-2800  was to be a spare.
>
> Has anybody compared the torque of the AC  vs  DC  version ??     Is it
> worth having M2  retrofitting
> the DC  motor into my older AC version ?   One thing I don't like is the
> very short 'pigtails'  coming out
> of the rotor itself.   They should have made em longer.. like 10' at least.
> Then splice them at a junction
> box, [ which I see they now have].  The original twist locking splice was a
> dead loss.
>
> The new water proof junction box  would make for any trbl shooting, a lot
> easier.
>
> Any thoughts would be appreciated.
>
> later.. Jim   VE7RF
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