[TowerTalk] Rotator Clamps

K8RI on Tower talk k8ri-tower at charter.net
Wed Mar 1 12:16:45 EST 2006

> This being a dumb question for the reasons I am about to find out, but 
> isn't
> there something that could be used that would function as would a piece of
> emery cloth or sandpaper placed between the clamp and the mast to "bite"
> into each?  Sure it would make it tough to get it apart, but.....

I think you would find the emery cloth used in this fashion would act more 
like a whole bunch of tiny bearings.  it would grip, but not as tight as a 
plan metal to metal fitting.

I've  not seen the Orion clamp, but the one for the ProSistel (BigBoy) 
rotators has a series of groves in the mast clamp which seems to work quite 

Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2

> 73, Jim
> ----- Original Message ----- 
> From: <K7LXC at aol.com>
> To: <jcowens at netscape.com>
> Cc: <towertalk at contesting.com>
> Sent: Wednesday, March 01, 2006 8:32 AM
> Subject: Re: [TowerTalk] Rotator Clamps
>> Hi, John --
>>     Tnx for your comments on the Orion mast clamps.  After reading the
>> comments of two significantly more  engineeringly informed TowerTalkians
> than myself
>> (W4EF & N6RK I think  were the ones), I have come to realize that the M2
>> clamps are heavy but do not  do a very good job of holding a mast - an
> admittedly
>> difficult task, and that  there probably isn't any bolt stretch that
>> contributed to the problem.
>>     With that in mind, how does one propose to keep the  mast from
> inevitably
>> turning in an Orion rotator? Personally I'm going to  continue to pin 
>> them
>> but even that isn't successful with MonstIR sized antennas.
>> Cheers,
>> Steve    K7LXC
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