tartsitto: Steve I still use that set up on my 15 mtr Tower with a distance
or 400+ ft to the base of the tower. I use two runs of 12(2) UF to the tower
and use a motor start cap.at the base with a normal run of 8 conductor 2x18
6x20 up the tower. I measure the V drop to the base and added a 6V filament
transformer to the back of the Control box wired in parallel with the boxes
transformer. Still working after 21 years ! YMMV Wayne W3EA
> From: n6sj@earthlink.net
> To: grants2@pacbell.net; dougn4ij@gmail.com
> Date: Mon, 28 Nov 2011 07:05:10 -0800
> CC: towertalk@contesting.com
> Subject: Re: [TowerTalk] Ham IV Rotor Motor Voltage Boost ?
> (Sluggishrotation)
>
> I used a 5V filament transformer to boost the AC voltage on my old rotor
> years ago. I put the transformer in a small box next to the control, and
> wired it into the rotor control housing, wiring the transformer primary in
> parallel with the AC power switch for the control. That way the boost
> voltage came on when I turned on the rotor control.
>
> 73,
> Steve
> N6SJ
>
> ----- Original Message -----
> From: "Grant Saviers" <grants2@pacbell.net>
> To: "Doug Snowden" <dougn4ij@gmail.com>
> Cc: <towertalk@contesting.com>
> Sent: Sunday, November 27, 2011 8:25 PM
> Subject: Re: [TowerTalk] Ham IV Rotor Motor Voltage Boost ?
> (Sluggishrotation)
>
>
> > The motor is AC and the internal transformer 24 volts so you can add a
> > boost filament transformer of 6 or 12 volts in series with terminal 2.
> > I don't recall the current needed since its been 25 years since I did
> > this, but around 3-4 amps sounds right for the boost transformer
> > rating. This worked fine on my Tailtwister which was 330 ft from shack
> > to rotator using the 16/18 gauge cable. Select 6 or 12 volts boost so
> > the voltage at the rotator is close to 24 volts, or do the Ohm's law
> > math for the wire resistance loss.
> >
> > You can check for the correct transformer phasing by measuring the
> > voltage at the boost output to terminal 1.
> >
> > IIRC both the transformer and box for it came from Radio Shack, add a
> > switch to turn it off.
> >
> > Grant KZ1W
> >
> > On 11/27/2011 6:33 PM, Doug Snowden wrote:
> >> Seen a few posts about putting the moor capacitor next to the rotor,
> >> rather than in the control unit in order to
> >> enable better turning (less slugishness). I have a problem in getting
> >> the antenna to turn. I substituted a section of cable from the base
> >> of the tower, and, indeed the antenna turns ok. So it is dig up the
> >> buried cable, and replace, or figure out how to jack the voltage up
> >> several volts to the rotor. Ideas on an easy way to increase the
> >> voltage? another xfmr and a rheostat? Seems like I should be able to
> >> measure the series resistance to get an idea of how much to increase
> >> the voltage.
> >>
> >> Doug, N4IJ
> >> _______________________________________________
> >>
> >>
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