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[TowerTalk] Orion rotors

To: <>
Subject: [TowerTalk] Orion rotors
From: (Nate Dixon)
Date: Mon, 12 May 1997 13:14:18 -0700
When M Square took over the Orion line, they can out with a new control
box (RC-2800P) that solved the problems with RF ect into the control

I have since gotten an updated control box to go with my Orion rotator
and all works nicely.


> ----------
> From:[]
> Sent:         Monday, May 12, 1997 8:42 AM
> To:;
> Subject:      Re: [TowerTalk] Orion rotors
> I'm no Orion expert, but at least the 2300 and 2800 do not have a
> directional pot.  They use a reed switch and magnet on a flywheel
> approach
> to count turns.  Some ferrite beads at intervals around your control
> cables
> might knock down a lot of that RF on your rotator cables.
> 73, Tyler K3MM
> on 05/10/97 08:40:59 AM
> To:   Tyler G Stewart/BENN/CEC
> cc:
> Subject:  Re: [TowerTalk] Orion rotors
> I am taking a position based on my experience at 250 feet, and looking
> at
> the diagram for the controller... The motor leads are 60 cycle... The
> directional pots are dc, and are heavily bypassed for ac... I have not
> heard of any rotator, Orion included, requiring shielded leads... If
> someone does have a problem, then their ground at the shack end is not
> a
> good rf ground.. I had paroblems at my new shack the first contest
> season
> when I tried to use a
> temporary ground... Had to make it right, real fast!
> In my installation the Orion (and Tic, Ham M) wire harness runs down a
> tower leg which is hot with rf when we are on 160... The harness is
> close
> enough to a half wave that the wire ends will instantly blow a hole in
> your
> flesh if you are touching them when the 160 array is keyed... I know
> that
> from direct experience when relocating the controllers from one bench
> to
> another during a contest... The lights on all of the rotators on that
> tower
> blink a bit when we are contesting on 160 with the amp running full
> war
> emergency power, and the indicator needle on the Tic rotor wiggles
> with the
> keying rate (I only do cw)... This is only on 160 and only on the
> tower
> that supports the 160 elevated array... The rotors on the other towers
> don't even notice we are on the air on any band... Based on this, I do
> not
> believe that you need shielded wiring for 60 cycle pickup... and if
> you are
> having a problem, then your ground in the shack is not at ground for
> rf,
> and you need to do your homework and bring it up to snuff..
> CHeers  ...  Denny
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