On Sat, 21 Feb 2004 23:52:08 GMT, Dave Shrader
wrote:

Dave Head wrote:
Hi,

I have a 4 el., 5 band quad on a Yeasu rotator on a Heights Aluminum tower.
The antenna is swinging, in a fairly stiff breeze today, a total of about 20
degrees of arc.

SNIP

Is it common for a rotator to have that much play?

Dave Head

No!!

That's what I thought.

Possibly the support mast, quad to rotator, is not pinned [pin failure]
or the brake in the Rotator has failed.

I don't think the pin has failed, but will look later this week. If the pin
failed, I think it'd just turn all the way around.

But, more than likely the G-450 is too small for your antenna.

My mistake. Its an 800DXA.

The specifications for the G450 are for 'small yagi''. Also, page 7 of
the manual, which can be found at: [the link is complete. Just click it
and locate the manual]

Yeah, I misremembered the size. I went up to HRO _intending_ to get a 450.
Got an 800 when the fellow there talked me up to it, pointing out the size of
my quad, esp. the 30' boom length.

http://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=104&encP rodID=X35dwkkMbr0%3D&DivisionID=65&isArchived=0

indicates that two terms are required for evaluation of load. The first,
the cross section wind load; the second, a K factor as defined by Yaesu.

I really suspect the antenna is too large for the G450.

Hope you can solve your problem.

Will crank it over soon and have a look. I do remember significant "play" in
the system when it was tilted over before. Probably should have looked at that
a little more critically.

Thanks for the info.

Dave Head

Deacon Dave, W1MCE