[TowerTalk] rotor plate bolt hole patterns

Richard McGaver mcgaver@execpc.com
Wed, 16 Feb 2000 05:03:54 -0600

Not the same pattern.  I went from tailtwister to Yaesu 1000 and now on to a
real rotator,
Rick  NK 9G
-----Original Message-----
From: K7LXC@aol.com <K7LXC@aol.com>
To: ryansci@infoave.net <ryansci@infoave.net>; towertalk@contesting.com
Date: Tuesday, February 15, 2000 4:06 AM
Subject: Re: [TowerTalk] rotor plate bolt hole patterns

>In a message dated 02/14/2000 7:03:48 AM Pacific Standard Time,
>ryansci@InfoAve.Net writes:
>> Can anyone tell me if the rotor plate bolt hole pattern for the Yaesu
>>  series of rotors (800-1000 series) is the same as for the HyGain T2X
>>  tailtwister?
>     They are both 4-hole patterns but the Yaesu has a little bigger
>Rohn rotor shelves have slotted bolt holes to accomodate both. Your rotor
>plate may be slotted too. How about asking the manufacturer if it'll fit
>no modifications?
>> Would I have to shim a 1 3/4 inch mast to properly center  it
>>  for a TTwister or Yaesu rotor to smoothly turn a full 360?
>     Depends on whether you will be using a thrust bearing or not. With no
>thrust bearing, you can just let the mast turn eccentrically in the top
>if that's your scenario.
>> I am going to use the rotor on a rotor base for a US Tower MA550MDP.
>     Is the 1-3/4" the mast drive at the bottom of the tower? If so, you'll
>probably need to shim it if you want to use a Hy-Gain rotator. I have seen
>very few shim schemes that worked; generally they slip. You might want to
>talk to a local machine shop and come up with a reducer scenario that'll
>better. Or go with a Yaesu rotor since you don't have to shim it.
>Cheers,  Steve   K7LXC
>Tower Tech
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