[TowerTalk] winds here in the winter that are pretty bad

[Roger (K8RI) on TT]

Thanks Jim!

Now, if only I could get back to climbing.  I find it very difficult to 
ass local hams for antenna help when I used tp be the one helping<:-))

73

Roger (K8RI)


On 3/5/2015 5:32 AM, Jim Thomson wrote:
> Date: Wed, 04 Mar 2015 22:02:50 -0500
> From: "Roger (K8RI) on TT" <K8RI-on-TowerTalk at tm.net>
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] "...//..winds here in the winter that are
> pretty bad."
>
> I figure any rotator I use should be capable of turning the antenna
> regardless of winds.  After tearing up a few of the ham series and an
> HDR-200, or 300 (forget which). It looked rugged, but I released the
> brake on a windy day.  It wen't past the stops and tore up 4, of 5
> pigtails.  That's when the PST61 went up.  That had a design problem
> with the top seal, but it'd turn and stop normally regardless of the wind.
>
> 73
>
> Roger (K8RI)
>
> ## Its an HDR-300.   It would go a long way to helping things out if the damned
> yagis  were designed and engineered correctly in the 1st place.   Simple matter
> to add a torque compensator plate down at REF end of the boom.   Fellow
> across  town was destroying T2Xs, 3 in a row on his long boom 20m yagi,
> with eles bunched up at the REF end.   Of course it was mounted in the usual way
> at the CG.   I designed the tq comp plate for him, using Yagi stress.    End of
> problems.   With the rotor removed, and on a 35 mph windy day,  it could be
> turned by hand  in any direction..and it would stay put.   Without the tq comp
> plate it would weather vane, and rip up the t2x.
>
> ##  If you insist on dragging a parachute behind your car, you will require another
> 350 hp.
>
> ##  another method  of tq comp is to mount at center of boom, then use a counter
> weight at the DIR end of the boom..... light end of the boom.
>
> ##  The tq comp plate is so simple its  beyond me why its not used more often.   You can
> easily reduce the tq  down to virtually nothing.
>
> Jim  VE7RF
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk


-- 

73

Roger (K8RI)


---
This email has been checked for viruses by Avast antivirus software.
http://www.avast.com