[TowerTalk] Heavy Duty Rotor

[Jim W7RY]

Simply use a windshield wiper motor and gear box. that is what AlphaSpid
uses.

73
Jim W7RY


--------------------------------------------------
From: "GALE STEWARD" <k3nd at yahoo.com>
Sent: Wednesday, September 07, 2011 4:44 AM
To: "towertalk reflector" <towertalk at contesting.com>
Subject: Re: [TowerTalk] Heavy Duty Rotor

> A bunch of years ago a VE3 wrote up an article for CQ Magazine describing
> the construction of an antenna rotator using 1/3 HP reversable motor and a
> right-angle worm gear drive gearbox made by Boston Gear and a couple of
> chain drives. As I recall, the motor/gearbox was outboard of the tower and
> used a chain drive to turn the mast. It was a pretty slick setup and I
> kept the article in my files. I thought of actually building something
> similar at some point but so far I'm still doing well with a prop pitch.
>
> 73, Stew K3ND
>
>
>
>
>
> ________________________________
> From: Jim Lux <jimlux at earthlink.net>
> To: David Jordan <Wa3gin at comcast.net>
> Cc: towertalk at contesting.com; 'Gene Fuller' <w2lu at rochester.rr.com>
> Sent: Tuesday, September 6, 2011 5:59 PM
> Subject: Re: [TowerTalk] Heavy Duty Rotor
>
> On 9/6/11 2:08 PM, David Jordan wrote:
>> PPM's are great if you have $4,000 for one...
>>
>
> Exactly... seems you could find an off the shelf collection of parts
> that get you there, perhaps with a bit of bracket fabrication (mind you,
> where I used to work, the words "all you gotta do is fabricate..." were
> guaranteed to result in giggles if not outright guffaws)
>
> But these days, $300 gets you a brand new 2HP TEFC motor, another couple
> hundred gets you a variable speed drive for it. The gearbox is going to
> be a bit tricky, because you need several stages if you're doing
> standard planetary gears to get down to the 1 RPM sort of speed you want
> from 1750.  But even so, I don't see it being more than $1000-1500 all
> told.
>
> I suppose the market is SO tiny that it's not worth it for someone to do
> anything more than a custom one-off.  The existing products from M2 or
> AlfaSpid or whoever are sufficient for 99%, and for the 1%, you're going
> to be cobbling up something custom anyway.
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk 





=======
Email scanned by PC Tools - No viruses or spyware found.
(Email Guard: 7.0.0.18, Virus/Spyware Database: 6.18260)
http://www.pctools.com/
=======