I am using an extra large one (think it weighs over a hundred pounds)
on my 40m antenna and the gear reduction is only about 5800-1. I
doubt there are any rotatable antennas that cannot be handled by any
prop pitch of any size.
Cirrently making a mount to hold a small one upside down and outboard
of tower for the 15m antenna. Planning to use an old Ham M type
rotator under the mast for the indicator and use the control box for
reading direction and activating relays to provide voltage to the prop
pitch.
Have not settled on plan to clamp a sproket around the mast. Any ideas
for something that is removable but can clamp so it will absolutely
not slip?
Stan, K5GO
Sent from Stan's IPhone
On Sep 6, 2011, at 7:04 PM, <john@kk9a.com> wrote:
> I use a medium prop pitch motor to turn my 20m and 40m beams,
> however I
> often wonder if it is any better than the small. The medium has a
> 7063:1
> gear ratio and the small has a 9576:1 ratio. Which has more torque
> and
> braking?
>
> John KK9A
>
>
>
> To: " <towertalk@contesting.com>
> Subject: Re: [TowerTalk] Heavy Duty Rotor
> From: "Gene Fuller"
> Date: Tue, 6 Sep 2011 15:48:42 -0400
>
> Hi Bill -
> PPM's come in small,medium and large. Even the "small" would
> probably do the
> job. Kurt / K7NV could give good advice. One of them and a Blue Heron
> controller would really give you a first class setup.
> Gene / W2LU
>
> ----- Original Message -----
> From: "Bill Gaines AD8P" <ad8p@wcoil.com>
> To: <towertalk@contesting.com>
> Sent: Tuesday, September 06, 2011 3:09 PM
> Subject: [TowerTalk] Heavy Duty Rotor
>
>
>> Our local club is looking for a very heavy duty rotor that will fit
>> inside
>> Rohn 45. It needs to turn a very large 3 el 40 and 6 el 20 on the
>> same
>> boom. What is out there in cyber space?
>>
>> Bill AD8P
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
Stan, K5GO
Sent from Stan's IPhone
On Sep 6, 2011, at 7:04 PM, <john@kk9a.com> wrote:
> I use a medium prop pitch motor to turn my 20m and 40m beams,
> however I
> often wonder if it is any better than the small. The medium has a
> 7063:1
> gear ratio and the small has a 9576:1 ratio. Which has more torque
> and
> braking?
>
> John KK9A
>
>
>
> To: " <towertalk@contesting.com>
> Subject: Re: [TowerTalk] Heavy Duty Rotor
> From: "Gene Fuller"
> Date: Tue, 6 Sep 2011 15:48:42 -0400
>
> Hi Bill -
> PPM's come in small,medium and large. Even the "small" would
> probably do the
> job. Kurt / K7NV could give good advice. One of them and a Blue Heron
> controller would really give you a first class setup.
> Gene / W2LU
>
> ----- Original Message -----
> From: "Bill Gaines AD8P" <ad8p@wcoil.com>
> To: <towertalk@contesting.com>
> Sent: Tuesday, September 06, 2011 3:09 PM
> Subject: [TowerTalk] Heavy Duty Rotor
>
>
>> Our local club is looking for a very heavy duty rotor that will fit
>> inside
>> Rohn 45. It needs to turn a very large 3 el 40 and 6 el 20 on the
>> same
>> boom. What is out there in cyber space?
>>
>> Bill AD8P
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
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