[TowerTalk] Rotator mast mount

[Pete Smith]

For what it's worth, I think a much better design is that by Custom 
Metalworks, because it spreads the load of the side-mounted stuff to all 
three legs instead of just one. Easy to reverse-engineer for your own use.

73, Pete N4ZR

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On 4/29/2011 11:14 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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