On 5/5/2012 3:36 PM, Jon Pearl - W4ABC wrote:
> I was just going to make that suggestion, Bob...
1500 in# of torque and 4500 in# of holding torque limit 25 sq ft of
antenna. It also has a 30' boom limit. My 7L 6-meter yagi would take
care of that.
It's not clear in the photos but I hope that is the top seal and not a
bearing where they show the rotator mounted to their 25G mounting plate.
The PST-61D has 2,150 in# of torque and 16,530 in# of holding torque.
IE, it doesn't need a brake and is rated for 39 sq ft of antenna.
IE about 43% more torque 2150-1500 = 650/1500=0.43 and almost 4X the
holding torque and 56% more antenna.
The heavy duty version PST61DHP has 7,640 in# of torque, the same 16,
530 in# of holding torque and is rated for 42 sq ft of antenna(s)Weight 66#
5X the rotating torque and 4X holding torque.
The early PST61s had a top seal problem that is supposed to have been fixed.
Be wary of the older ones using the green, AC motor. You can build a
shield to keep water off the top seal fairly easy, but they are likely
to fail if not modified.
I believe they also are using white Lithium grease now instead of the
heavy weight gear lube there were using.
One more point, I don't think you will get one inside a 25G.
> Jon Pearl - W4ABC
> On 5/5/2012 2:15 PM, Bob Gibson wrote:
>> There is a new rotor on the market now that looks pretty good..check
>> out..oytorq.com..I use a orion 2800 and a green heron to turn a 4 ele 40 and
>> a 4 ele steppir..no problem here in fl. 73s Bob
>> Bob Gibson W5RG
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