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[TowerTalk] Fw: Re: Prop Pitch Motor

To: towertalk reflector <>
Subject: [TowerTalk] Fw: Re: Prop Pitch Motor
Reply-to: "Tower and HF antenna construction topics." <>
Date: Mon, 15 Mar 2010 13:21:25 -0700 (PDT)
List-post: <">>
> George is dead on with his comments.
> I used a "modified" PP for many years. It worked fine but
> needed to be fixed about every two years. The standard
> "modification" consisted of cutting off the top-most gear
> from the output shaft. This output shaft was then drilled
> and bolted to the planetary gear cluster buy
> drilling/tapping corresponding holes in it. The bolts can
> sheer or work loose at the very least (I've had both). I had
> custom-made brass pieces installed in mine and even with
> helicoil inserts, loktite, and hardened bolts it would all
> loosen up over time. BTW, I'm turning a TH6 and a 40-2CD -
> nothing really big.
> Luckily, I obtained another PP (unmodified) And used the
> parts from it to return mine to stock configuration. It
> takes about a minute & 45 seconds to rotate a full 360
> degrees now but you can turn just about anything you want
> even in high winds. I'm VERY happy that I returned mine to
> the unmodified configuration.
> I would not recommend turning anything big with a modified
> PP unless you like doing repairs.
> 73, Stew K3ND


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