[TowerTalk] NEW Tail Twister Rotator

[K8RI]

On 11/3/2012 4:08 PM, Doug Renwick wrote:
> The first thing you do with a HDR-300 is remove the stops.  If it rotates
> past the stops, things break.  By pass or remove the stops.
> The HDR-300 does not have a wedge break like the Ham or Tailtwister.
> The shaft keyways in the HDR-300 are poorly designed resulting in worn
> keyways with lot of play.  Unless you braze the shaft to the large gear or
> redesign the shaft keyways, it will end with a lot of play which will get
> worse and worse as the keyway wears.
> One does not need to raise the mast to remove a HDR-300, and generally with
> a Ham/Tailtwister.  Just leave say half inch gap between the mast end and
> the rotor end.

Unfortunately working alone doesn't always come out quite as planned.

I'm just finishing up a winch to go on the tractor to give me more control.

73

Roger (K8RI)


> BTW HDR-300 with ac motor do not work as well as other dc motors when used
> with a Green Heron controller.
> An Alfa Spid is a good rotor.
>
> Doug
>
> I'll run the race and I will never be the same again
> -----Original Message-----
>
> When I moved here I put up the big array.  It tore apart the rotator in
> a matter of days. I picked up to HDR 300's.  The HDR rotators were
> plenty strong enough, but the motors offered too little resistance to
> turning.  One day which was kinda windy I tried to turn the system, but
> as soon as I released the brake the array spun around before I could
> stop it with the motor. It took the rotator right past the stops.
>
> A few days later it did the same thing with a second HDR.  That was when
> I ordered the double worm gear rotator and swore I'd never use a rotator
> with a wedge brake on anything larger than a small tribander.
>
> As these rotators were 20 feet down from the top of a 100 foot 45G they
> were a royal PITA to repair which required raising the mast a few inches
> with all that load and locking it in place to keep it from turning with
> the rotator out.
>
>
> Now here's a rotator and antenna system.
> http://www.rogerhalstead.com/ham_files/skyhook.htm
>
> 73
>
> Roger (K8RI)
>
>
>
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