[TowerTalk] Convert a Ham IV to a T2X?

[Rob Frohne]

Thanks Phil for the advice.  I have two prop pitch rotators I would use 
if I needed something that would turn the world.  I'm in a rather 
unique situation though.  I have a THD-7122 (122 foot light duty crank 
up Tri-Ex tower).  I plan to leave it cranked down unless I'm using it. 
  I don't spend a lot of time on the air, but like to experiment with 
antennas.  This allows me to run an antenna up and test it out, and 
then lower it when I'm done.  Unfortunately the tower is too small to 
allow mounting any rotor inside it.  I'll have to mast mount a rotor.  
I don't plan to put a large antenna like my old 4 element quad up, 
because it won't allow more than around 100 lbs of antenna, pipe and 
rotor.  The prop pitch rotors are too heavy and don't mount easily to a 
pipe.  I was going to use the Ham IV, but before I did that I had to 
open it up and find out why the indicator wasn't working.  I found the 
broken bolt, and a broken end stop.  I also got to thinking that those 
bolts don't hold much inside the tower, but in a mast mount situation, 
they are a lot more important.  Then I got to thinking about the T2X 
with six big bolts on the outside instead of four small bolts bolted 
into the soft pot metal bell housing.  :)

73,

Rob
On Apr 18, 2004, at 1:30 PM, Phil - KB9CRY wrote:

> Don't take this personally but an even better idea is the scrap that 
> rotator and purchase a worm gear Alfa Spid rotator.  Super strong worm 
> gear technology, no brakes to break, no end stops to get jammed up on, 
> big worm gears, mucho torque, less wires to run.  Mine has been 
> turning my 3 el. 40 M yagi no problem.  I gonna soon drop my KT34XA 
> and while I do that, I'm gonna swap out my Ham IV for a Spid.   Phil  
> KB9CRY
>
> Rob Frohne wrote:
>
>> Hi All,
>>
>> I noted on the following page that there seem to be few differences 
>> between the Ham IV and the T2X rotors.  
>> http://www.rotordoc.com/history.html
>> I am getting ready to put up a new antenna, and so have opened up my 
>> Ham IV to find out what needed to be fixed.  There were several 
>> issues (it was turning a 4 element quad for several  years).  One of 
>> the issues is that one of the four bolts that holds the bell housing 
>> to the brake housing has a bolt broken off in it.  I have two of 
>> these Ham IV's that I was swapping out as necessary for maintenance.  
>> My other one has had the bell housing drilled and tapped for larger 
>> bolts once and is in need of it again.  I think moving to a T2X looks 
>> like a better idea than just replacing these parts, especially since 
>> it looks like there may be only a few extra parts to make it a T2X.  
>> (I already have CATS super wedge.)  Has anyone had any experience 
>> with this?
>>
>> Thanks,
>>
>> Rob
>> -- 
>> Rob Frohne, Ph.D., P.E.
>> E.F. Cross School of Engineering
>> Walla Walla College
>> http://www.wwc.edu/~frohro/
>>
>> _______________________________________________
>>
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>> "Wireless Weather Stations", and lot's more.  Call Toll Free, 
>> 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>>
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>
>
--
Rob Frohne, Ph.D., P.E.
E.F. Cross School of Engineering
Walla Walla College
http://www.wwc.edu/~frohro/