[TowerTalk] Rotator mast mount

[K8RI on TT]

On 4/30/2011 1:50 PM, Mike Fatchett W0MU wrote:
> I would probably want to mount the rotor on a steel plate instead of the
> mast bracket.  The 3 ele SteppIr is going to require some interesting
> engineering as the driven element is dead center on the boom.

Where do they put the boom to mast bracket?  That should work fine.

73

Roger (K8RI)

> On 4/30/2011 11:21 AM, Ed K0KL wrote:
>> I believe the windload when mast mounted is 7#. Not a good idea!
>>
>> ed K0KL
>>
>> On 4/29/2011 10:14 AM, Clay W7CE wrote:
>>> On 4/28/2011 10:31 AM, K8RI on TT wrote:
>>>> On 4/29/2011 12:25 AM, Guy Molinari wrote:
>>>>> Anyone have any recommendations for mounting a Ham IV atop a 2" mast section.    I'm building a standoff mount on one of my towers for a 3 element SteppIR.   I've got some 2" angle iron that I'm going to bolt in place of 2 sets of steps on my AB-105 tower.   This will allow for about a 4' piece of mast held about 10-12" from the tower.
>>>>>
>>>>> Now I just need to track down a mount for the Ham IV.   I should get about 100 degrees or so of azimuth.   Together with the 180 feature of the SteppIR it should do the trick for JA/CA mults and for keeping the US off my QRG when I've got the big boys pointed at EU.
>>>> I would strongly suggest a thrust bearing be mounted above the Ham IV
>>>> even though side mounted.  The SteperIR would be a heavy load on the
>>>> rotator at the top of a tower, let alone on top of a 4' mast to add
>>>> leverage.
>>>>
>>>> 73
>>>>
>>>> Roger (K8RI)
>>>>
>>> I agree with Roger.  the 3el SteppIR is a lot of wind load for a Ham IV
>>> without a thrust bearing.  Look at the W9IIX RM-16 Antenna/Rotor mount
>>> for an idea of how to do this:
>>>
>>>          http://www.w9iix.com/ii00012.htm
>>>
>>> 73,
>>> Clay  W7CE
>>>
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