Think we’re all essentially in agreement.
Enjoy thanksgiving.
Steve
Sent from my iPhone
> On Nov 26, 2020, at 10:22 AM, john@kk9a.com wrote:
>
> If your tower is plumb and you have perfectly level ground with equal anchor
> spacing and have a pier pin base the guys will have equal tension. I use a
> transit level and a Loos gauge for my towers. I believe that the Loos is
> accurate enough for my towers. I am more concerned that the tower it plumb
> over equal tension on each guy although if I recall they seems reasonably
> equal because I adjusted my anchor spacing for the unlevel ground.
>
> 73 and happy Thanksgiving,
>
> John KK9A (W4AAA in last weekend's SS contest)
>
>
> Steve lists at oakcom.org
>
>> On 11/25/2020 7:39 PM, Steve, NR4M wrote:
>>
>> What is the Loos gauge telling you?
>> Those things were intended for the type of cable used on boat rigging.
> They probably do that just fine.
>> The finer stranding of the boat cable deflects more easily than the EHS
> cable would, so I think all bets are off as far as accuracy goes.
>> The best you can do with a Loos gauge, and it probably does it just fine,
> is show you if the EHS tension is equal.
>> But, if I recall my physics correctly, -if- all guys at any given level
> are identical ( same distance to each guy anchor, etc) then the tension on
> any one will be the same as the other two.
>> I have a nice, brand new tension dynamometer and I have been intending for
> several years on taking pieces of 3/16, 1/4, 5/16 and 3/8 inch EHS, putting
> them in series with each other and the dynamometer between BIG trees, and
> try and calibrate a large Loos gauge.
>
> Mostly correct. If you consider the tower as a flexible column, the three
> guys at any level will be fairly equal in tension. Anyone who installs
> taller R45 & R55 towers knows that intuitively. If it were a rigid column,
> not so much. It so happens though that even big towers when engineered for
> maximum efficiency turn out to be fairly flexible because the guy levels are
> spaced way further apart.
>
> When I mentioned deflection gauge I was thinking of something like a
> Penn-Tech, which comes with a table letting you measure either EHS or bridge
> strand *fairly* accurately.
>
> -Steve K8LX
>
>
>
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