[Towertalk] Re: Re: Stacking (again)

[Jan Erik Holm]

Agree Tom. I´ve done a lot of modeling with NEC2 and it
looks like 20 ft is very safe, I know that 10 is pritty bad and
15 is "pritty" good, your real life experience seems to say
the same.

73 Jim SM2EKM

PS: I have a 15 and 10 stack on the same tower and the low
yagis are about 15-16 feet separated, seems to work ok.
NEC2 says I´m loosing 0.5 dB gain on the 10 but pattern
is esentially the same so I did buy that.
------------------------------------------------------------

Sain'T Tom wrote:

>Chuck, K0TVD,
>
>    My personal on the tower experience (not a model) is that a ten meter
>yagi will not perform  well unless it is at least 15 feet or more away from
>a 15 meter yagi.
>
>73
>Tom K4RV
>
>----- Original Message -----
>From: "Jan Erik Holm" <sm2ekm@telia.com>
>To: <towertalk@contesting.com>
>Sent: Monday, May 20, 2002 19:52
>Subject: [Towertalk] Re: Stacking (again)
>
>
>>I would try to get the 10 and 15 as far separated as possible,
>>maybe the 20 in betwen.
>>
>>73 Jim SM2EKM
>>----------------------------------
>>
>>Chuck Sudds wrote:
>>
>>>I am thinking of stacking some monobanders on my 100ft Rohn 45G tower but
>>>
>I
>
>>>need to know just how much mast to buy.  I currently have a HyGain 205CA
>>>about 6" above the tower and want to add a HyGain 153BA (12ft boom) above
>>>that.  At the top, I want to also add a HyGain 103BA  (8ft boom).  The
>>>rotor is mounted inside the tower and down approx 5ft.
>>>
>>>Does the old addage of spacing them apart by  "half the boom length of
>>>
>the
>
>>>shortest boom" still apply with a stack of three beams?  If not, can
>>>someone help?  Thanks, in advance.
>>>
>>>Chuck  KØTVD  Missouri Valley, Iowa
>>>
>>>
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>>>
>>
>>
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>
>