Thanks guys, both off and on reflector for the replies. What a great source of
knowledgable people this is.
To answer the query, the 'thick wall' is 4.5mm, which in non-metric terms
equates to 0.23 inches. The rotator sits inside the tower, with thrust bearing
approximately 2' higher, a TH11 will be immediately above the thrust bearing
and spaced 9' higher a 402-CD.
Steve
GW4BLE
Sent from my iPhone 4S
On 16 Apr 2013, at 19:44, Grant Saviers <grants2@pacbell.net> wrote:
> Sleeving works, UST sells 20' x 2" x 1/8 wall steel masts with the lower 10'
> sleeved to 1/4". With a 2.5" od (what is "thick wall" and what is the alloy
> and temper?) you potentially have a very strong mast. What is the load?
> Try one of the mast calculators before sleeving. (ARRL, K7LXC) or free by
> WD6P
> http://www.math.niu.edu/KARC/mast/
>
> Grant KZ1W
>
>
> On 4/16/2013 8:31 AM, GW4BLE wrote:
>> I have a question concerning 'sleeving' (can't think of a better way to
>> describe it) - I have a 16' x 2.5" OD thick-wall aluminium tube that will
>> be used as a stub mast, would inserting 6' x 2" OD thick-wall aluminium
>> tube into the bottom of the tube add to its' 'strength' in any way or would
>> it just add unnecessary weight?
>> Sliding it in makes quite a snug fit, but not exactly 'tight'
>>
>> Steve
>> GW4BLE
>>
>> Sent from my iPhone 4S
>>
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|