[TowerTalk] Re: G-800

Mike Holley mholley@quik.com
Sun, 28 Feb 1999 17:13:34 -0800 


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Thanks Steve ,
                       Lets all hope that we have learned something from this I
most certainly have ,but please read my response to the "K" factor data being in
the published stand alone rotor brochure
                                                               Mike VE7AVM

K7LXC@aol.com wrote:

> In a message dated 99-02-28 15:25:55 EST, mholley@quik.com writes:
>
> >  My concern is that at the time of purchase of the rotor from a authorized
> >  YAESU dealer it was clearly explained the make and size of the single mono
> >  band antenna which a rotor was required . (HAM-PRO H240-4)
> >   The only concern the dealers representative had  was the, total wind serf
> >  ace area of the antenna, which is 8.27 sq ft. He then advised that as the
> >  G-800 had a maximum antenna surface area limit of 2m sq( 21 sq ft) and
> >  would be more than adequate to safely handle the antenna in question .
> >   At no time was any reference to the maximum "K" factor requirements which
> >  had it been I would have selected the G-1000 series .
>
>        This is an instance of the salesperson not knowing "everything".
>
>      In the old days, the governing spec for rotator capacity was "square
> feet". About 10 years ago, Hy-Gain instituted their Effective Moment (EM) spec
> which is the turning radius times weight. Soon Yaesu followed suit with their
> "K Factor". It's an improvement but obviously not everyone is familiar with
> it.
>
>      BTW, you can see from your own situation that square footage alone
> doesn't work.
>
>       The spec 'error' was made by the salesperson; not by the manufacturer
> (since they publish the ratings) or the buyer (since he didn't really know
> either). I would take my complaint back to where you purchased it - they
> should be interested in making it good for you.
>
> >   Referring to the YAESU Antenna rotor specification brochure it is noted
> >  that NO reference is made what so ever to "K" factor considerations for
> >  any of the published rotors offered .
>
>       Huh? I don't have the Yaesu general catalog to look at but the
> standalone rotator brochure certainly has the K Factor as one of the specs.

This above para that I am confused about ,I have YAESU stand alone brochure which
I got just prior to the purchase of the G-800SDX (1994) which gives the following
data:-
                          Power consumption :                   100VA
                          450 deg rotation time :                 (S)55s
(SDX)43-93s)
                          Rotation torque:                           600-1100kg-cm
(43-79 ft lbs
                          Stationary torque:                        4000
kg-cm        (288ft-lbs)
                         Max. vertical load  :                      200
kg                (440 lbs)
                         Max.ant. surface area :                   2 m sq.
                         mast diameter:                               38-63
mm       (1 1/2-2 1/2 in.)
Do I assume that the "K" factor is a product of one or a number of the above
specifications ?
                                                                 Mike VE7AVM

>
>       A mistake was made and some damage done. Hopefully we've all learned
> something and it'll get taken care of to everyone's satisfaction.
>
>       There is one moral though: Subscribe to TowerTalk to help stay out of
> trouble!
>
> Cheers,   Steve   K7LXC
> Tower Tech
> Champion Radio Products
>
> --
> FAQ on WWW:              http://www.contesting.com/towertalkfaq.html
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Thanks Steve ,
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Lets all hope that we have learned something from this I most certainly
have ,but please read my response to the "K" factor data being in the published
stand alone rotor brochure
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Mike VE7AVM
<p>K7LXC@aol.com wrote:
<blockquote TYPE=CITE>In a message dated 99-02-28 15:25:55 EST, mholley@quik.com
writes:
<p>>&nbsp; My concern is that at the time of purchase of the rotor from
a authorized
<br>>&nbsp; YAESU dealer it was clearly explained the make and size of
the single mono
<br>>&nbsp; band antenna which a rotor was required . (HAM-PRO H240-4)
<br>>&nbsp;&nbsp; The only concern the dealers representative had&nbsp;
was the, total wind serf
<br>>&nbsp; ace area of the antenna, which is 8.27 sq ft. He then advised
that as the
<br>>&nbsp; G-800 had a maximum antenna surface area limit of 2m sq( 21
sq ft) and
<br>>&nbsp; would be more than adequate to safely handle the antenna in
question .
<br>>&nbsp;&nbsp; At no time was any reference to the maximum "K" factor
requirements which
<br>>&nbsp; had it been I would have selected the G-1000 series .
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; This is an instance of the salesperson
not knowing "everything".
<p>&nbsp;&nbsp;&nbsp;&nbsp; In the old days, the governing spec for rotator
capacity was "square
<br>feet". About 10 years ago, Hy-Gain instituted their Effective Moment
(EM) spec
<br>which is the turning radius times weight. Soon Yaesu followed suit
with their
<br>"K Factor". It's an improvement but obviously not everyone is familiar
with
<br>it.
<p>&nbsp;&nbsp;&nbsp;&nbsp; BTW, you can see from your own situation that
square footage alone
<br>doesn't work.
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The spec 'error' was made by the salesperson;
not by the manufacturer
<br>(since they publish the ratings) or the buyer (since he didn't really
know
<br>either). I would take my complaint back to where you purchased it -
they
<br>should be interested in making it good for you.
<p>>&nbsp;&nbsp; Referring to the YAESU Antenna rotor specification brochure
it is noted
<br>>&nbsp; that NO reference is made what so ever to "K" factor considerations
for
<br>>&nbsp; any of the published rotors offered .
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Huh? I don't have the Yaesu general catalog
to look at but the
<br>standalone rotator brochure certainly has the K Factor as one of the
specs.</blockquote>
<font color="#FF0000">This above para that I am confused about ,I have
YAESU stand alone brochure which I got just prior to the purchase of the
G-800SDX (1994) which gives the following data:-</font>
<br><font color="#FF0000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Power consumption :&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
100VA</font>
<br><font color="#FF0000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
450 deg rotation time :&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
(S)55s (SDX)43-93s)</font>
<br><font color="#FF0000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Rotation torque:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
600-1100kg-cm (43-79 ft lbs</font>
<br><font color="#FF0000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Stationary torque:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
4000 kg-cm&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (288ft-lbs)</font>
<br><font color="#FF0000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Max. vertical load&nbsp; :&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
200 kg&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
(440 lbs)</font>
<br><font color="#FF0000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Max.ant. surface area :&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
2 m sq.</font>
<br><font color="#FF0000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
mast diameter:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
38-63 mm&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (1 1/2-2 1/2 in.)</font>
<br><font color="#FF0000">Do I assume that the "K" factor is a product
of one or a number of the above specifications ?</font>
<br><font color="#FF0000">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Mike VE7AVM</font>
<blockquote TYPE=CITE>&nbsp;
<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A mistake was made and some damage done.
Hopefully we've all learned
<br>something and it'll get taken care of to everyone's satisfaction.
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; There is one moral though: Subscribe
to TowerTalk to help stay out of
<br>trouble!
<p>Cheers,&nbsp;&nbsp; Steve&nbsp;&nbsp; K7LXC
<br>Tower Tech
<br>Champion Radio Products
<p>--
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