[Towertalk] rotating T2X from 2 locations

[WB9UWA Jim Shaffer]

HI All,

I think Don is right on the money.
A nice way to do this is to use a relay with sufficient contacts on it.
Use an indicator LED at each control box location to tell which
control box is on (LED across relay coil). Place a single pole double
through switch at
each control box location to control the relay and wired EXACTLY
as a 3-way light switch. In this way control can be switched from
either end.

73,Jim Shaffer, WB9UWA.


----- Original Message -----
From: VE6JY Don Moman <ve6jy@freenet.edmonton.ab.ca>
To: <TOWERTALK@contesting.com>
Sent: Wednesday, February 27, 2002 11:47 PM
Subject: Re: [Towertalk] rotating T2X from 2 locations


> While it *might* work (i.e. not go up in smoke) there are 3 concerns:
>
> 1: the accuracy of the readout would suffer as you are drawing twice as
much
> current to move the two meter movements. But likely "good enough" for HF.
>
> 2: the motor capacitors would be in parallel, causing the motor current to
> be higher than it should be.
>
> 3 the brake voltage from the powered unit would appear across the brake
> winding transformer in the other unit, diverting some of the energy away
> from doing its job on the brake solenoid. If it takes too much away you
> won't get the brake to release, and if you have a long run of cable
already,
> you'll likely have problems.
>
> I would use a relay activated by the brake voltage to disconnect the
> transformer secondary in the other box.  I would remove one cap. I'd
likely
> try to leave both meters in parallel and just recalibrate.
>
> This would result in a completely automatic system with no operator
> knowledge of the system or intervention needed.
>
>
> 73 Don
> VE6JY
>
>
>
>
>
>
> > On Wed, 27 Feb 2002 10:15:53 -0700 "Bruce Makas" <k1my@msn.com> writes:
> > > I would like to be able to turn a Tailtwister rotor from either of 2
> > > desks.
> > > Do I just wire the rotor controls in parallel? or I need to have an
> > > in line switch/relays?
> > >
> > > Is there a problem if both control units are powered on and I use
> > > one of
> > > them to turn the rotor? No damage to the other one and the indicator
> > > just follows?
> > >
> > > In addition (if that wasn't enough) does anyone sell T2X control
> > > boxes?
> > >
> > > Thanks, Bruce K1MY
>
>
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