Can I step back and ask a bigger-picture question?
Given the short distance between top and bottom antennas, is there a benefit
to this kind of array vs. interlaced monobanders on a common boom?
In Fudo's case, perhaps he is using existing antennas and isn't in a
position to replace them with something such as a long-boom F12 antenna, but
in a from-scratch installation, is there any reason to move to the
mechanical challenges of stacking antennas like this so close together vs.
using just one antenna?
73, kelly
ve4xt
On 12/11/14 1:35 PM, "n8de@thepoint.net" <n8de@thepoint.net> wrote:
> I agree with Joe, W4TV, but, would add the comment:
>
> PUT THE 20M monobander on TOP of the stack .. that is .. invert it,
> with the 10m on the BOTTOM.
>
> 73
> Don
> N8DE
>
>
>
> Quoting "Joe Subich, W4TV" <lists@subich.com>:
>
>>
>> Unless the monobanders have been designed to operate in a stack
>> ("Christmas tree"), stacking them as closely as will be needed to
>> stay within your 5m mast will certainly reduce their performance.
>>
>> If the monobanders have been optimized to work in a stack, use the
>> spacing for which they were designed.
>>
>> 73,
>>
>> ... Joe, W4TV
>>
>>
>> On 2014-12-11 9:16 AM, Fuad Arnautovic wrote:
>>> Hi all
>>>
>>> I need advice from some more experienced with stacking about possible setup.
>>>
>>> Have self-standing tower abt 18 mtr, mast 50 mm (2") 5-6 metres long
>>>
>>> Antennas are three monoband yagis as follows
>>>
>>> 20m 4el 9,5m boom
>>> 15m 5el 9,6m boom
>>> 10m 5el 7,6m boom
>>>
>>> Does it "Christmas tree" setup working well with this monobanders?
>>> What is your recommendation for vertical spacing between? Does 2"
>>> mast is strong enough to support all them.
>>>
>>> I would install lowest antenna for 20m then 15m and on the top 10m
>>>
>>> I know that is compromise against performance and radiation
>>> pattern, but actually cannot install another tower
>>>
>>> Please help
>>>
>>> Thanks in advance
>>> Fudo, E73CQ
>>> _______________________________________________
>>>
>>>
>>>
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>>> http://lists.contesting.com/mailman/listinfo/towertalk
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