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Re: [TowerTalk] Ask the experts - rooftop installs and more

To: TowerTalk@contesting.com
Subject: Re: [TowerTalk] Ask the experts - rooftop installs and more
From: "Cedrick \"Fred\" Johnson - WT2P" <fredwt2p@gmail.com>
Date: Sun, 08 Jul 2007 20:21:02 -0400
List-post: <mailto:towertalk@contesting.com>
I didn't call him stupid, read in which context the reply was written..
I'm not that old, although I am approaching mid-life crisis age at 26 ;-)

back to our regularly scheduled programming.....

I am looking for a couple ideas for my QTH here in Brooklyn. I 
apparently have some leverage to put antennas on the roof (I reside on 
the top floor now)...

Are there some guides for mounting towers on rooftops? I'm not looking 
for anything to be ridiculously high - I have seen towers on various 
rooftops here in Brooklyn. (I have a stellar view to the East (Europe) 
and Africa, to the north/n-west is the big noise generator manhattan)

Right now my options are as follows:

1) use a steppir vertical for 80-10M (perhaps could do some sort of 
multiple vertical phasing to achieve directionality? Any suggestions?)
2) put up a small tripod with a tribander beam, and optionally a 40M 
beam on the mast as well and just slap a really long length of wire over 
the side of the building for 80M
3) go with perhaps 20-30ft of tower section mounted on the roof with the 
obligatory beam, and a sloper dipole (I can run the wires at least 200 
ft on each side of my unit)

I'd really like to use directional antennas for 20-10, (40 optional) ....


thanks for any ideas - it's been a while and my old computer with a lot 
of my antenna resources was stolen, so .... thus the need to ask again..

wt2plid



Kent Winrich wrote:
> WOW has this gotten into a bunch of old men bitching at each other or what?
>
> Suggestion.. instead of bashing each other to death, why not find common
> ground, and create CONSTRUCTIVE criticism???  Calling each other stupid is
> rather sophomoric, dont you think?  Can we get back to towers, before you
> all shoo a bunch of good hams away???
>
> Kent,
> K9EZ/4/LID/B0ZO
>
>
> On 7/8/07, Cedrick Fred Johnson - WT2P <fredwt2p@gmail.com> wrote:
>   
>> ..careful of who you call stupid or cheap... What you see.. is not
>> always exactly what you get...
>>
>>
>>
>> wt2p
>>
>>
>>     
>>> Jim Brown wrote:
>>>
>>>       
>>>>> This "Mosley Bashing" has finally hit my button !!
>>>>> I have  a PRO-57A and am very satisfied with it. It
>>>>> is my understanding that  subsequent models were
>>>>> "improved". I have not seen any published data  from
>>>>> verifiable sources except those peddling their
>>>>> "comparisons" which  I don't intend to pay for.
>>>>>
>>>>>           
>>>> And YOU have hit mine!!!
>>>>
>>>> Do you have a clue about how much work it takes to obtain ACCURATE
>>>> data on the performance of an antenna?  To measure the gain, you
>>>> must build the antenna, get it up in the air on a substantial
>>>> tower and rotor in some test range where there is nothing to
>>>> seriously distort the data, make sure that it is properly tuned,
>>>> drive it with a transmitter, and MEASURE the field strength at
>>>> some distance that is representative of its far field pattern. To
>>>> measure the pattern, you must repeat those measurements every 5-10
>>>> degrees. 4-5 guys could easily work a full day to do that if the
>>>> transmitting and receiving towers were already there and nothing
>>>> went wrong. It could easily take twice that time if Mr Murphy came
>>>> to call.
>>>>
>>>> To measure another antenna, you must take the first one down, put
>>>> the new one up, and repeat that process. And, of course, you must
>>>> have purchased or borrowed the antenna in the first place. And
>>>> even if it was borrowed or donated, you still must spend the time
>>>> and money to unpack, handle, repack, and return it.
>>>>
>>>> Those "peddling their comparisons" have HUNDREDS  of man hours and
>>>> a significant dollar investment in those measurements, and YOU are
>>>> either too stupid or too cheap to contribute to their work. You
>>>> clearly don't deserve to benefit from it.
>>>>
>>>> 73,
>>>>
>>>> Jim Brown K9YC
>>>>
>>>>
>>>> _______________________________________________
>>>>
>>>>
>>>>
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>>>>
>>>>
>>>>         
>>>       
>> _______________________________________________
>>
>>
>>
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>>     
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