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Re: [TowerTalk] Speaking of the HAMSeriesofrotators...How doyoutell the

Subject: Re: [TowerTalk] Speaking of the HAMSeriesofrotators...How doyoutell the difference.
From: "Roger (K8RI)" <>
Date: Tue, 26 Oct 2010 23:51:33 -0400
List-post: <">>

On 10/26/2010 11:20 PM, David Thompson wrote:
> I have used a T2X since about 1980.  It has the terminal strip on the base.
> To put it inside my 71 foor Tristao crank up I had to remove one of the
> sidebars.  Lou Tristao advised putting a Rohn 25 guy bar around the middle
> of the tower section. This takes some work but fits snugly.
> The rotor has been to repair three times.  The first after 8 or 9 years it
> went to Allen WB4GNT who runs Max Gain Systems (MGS4U).  He charged me $75.
> I sent to him as a tornado passed over the house and lifted the beams, mast
> and rotor/rotor plate and tirned the whole mechanism
> 45 degrees.  Brad W9FX worked on it as it took a beating by Hurricane Ivan
> and wind blasts at 85 to 90 MPH.  He did find extensive damage but it was
> fixed and that was 3 years ago.
> Tristao/US Tower has what they call a sleeve bearing in the top of the tower
> below the top plate.  I bought a Fafnir commercial bearing that I placed on
> the top of the tower.
> When I first moved to Atlanta in the mid 1970's I did buy a converted prop
> pitch from a fellow in CA (Bob Leo).  I think Bob was a WB6.  The problem
> with the prop pitch was it nearly broke the top of the tower off on one
> occassion when a element caught in a tree.  The HAM M/T2X is the only rotor
> that fits inside my tower.  I looked at one of the RD1800's but its slightly
> bigger and not much better.
Did you look at the Alpha Spid? Of course, like the prop pitch, it 
likely has enough torque to twist the top of the tower if the mast hung up.
The PST-61 and 71 take a little work to fit the 45G as the motor has to 
be repositioned to stick out the side of the tower. Doing that will let 
it slip right inside.  I don't know if the new versions have the same 
requirements or not.


Roger (K8RI)
> I do have another old T2X that I use as a temporary replacement when I send
> the main one off for repairs.
> 73 Dave K4JRB
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