[SixClub] [50mhz] The utlimate 6m yagi???

[Richard J. Fiero II W5TFW]

 Roger,

 You actually have a copyright on your pictures ?  MY Hero !  what rotor 
are you using  for that tower ?

                                                                                                        
Joey

Roger (K8RI) wrote:
> Richard J. Fiero II wrote:
>   
>> HOW would you turn 4 of them ?   with a CAR ?
>>   
>>     
> My current system has about twice the wind area of one of those. 
> http://www.rogerhalstead.com/ham_files/Tower29.htm  <:-))
>
> That's not much more than a 3L full size yagi on 40.  Constructing the 
> "H" frame to hold them would be the biggest task.  then again, it's not 
> exactly ROHN 25 material either<:-))
> There are several stock rotators that would handle the quad array.  The 
> PST71, and the big AlphaSpid should do it.
>
> Unfortunately they have a very narrow usable band width. 4 of them would 
> probably narrow that even more.
>   
>> John Geiger wrote:
>>   
>>     
>>> Imagine what stacking 4 of them would do!!! Now that would be a 6m setup.
>>>
>>>     
>>>       
> Theoretical 20 db gain although it'd be some what less in practice.
> There are also some down sides such as a very narrow beam width and the 
> addition of side lobes albeit the first side lobe is down 18 db.  At 38' 
> wide and 36' high that's about 4 25G sections for a cross boom and 
> nearly that much on each side for the vertical portions. IOW about 70' 
> of 25G just to make the H frame. I think they are about 30# each so add 
> another 210# for the frame plus 332# for 4 antennas so that's 442# for 
> the antennas an mount. With 10.7 sq ft X 4 = 42.8 sq ft of wind load and 
> 442#. At roughly$1700 each that's $6800USD just for the antennas (bet 
> you could get a price break for 4 <g>) Now we have 7 sections of tower 
> for the H-frame...
> This is starting to get a bit pricey.
>
> I've been looking at moving my tri-bander down the tower to 70' on a 
> ring rotator (any one know where I can find one at a reasonable price 
> that will fit a 45G? even if it's used and I have to work on it some). 
> Then put a 4L heavy duty "shorty fourty" at the top which weighs about 180#.
>
> Maybe I could replace my 7L C3i with one, move the tri-bander and then 
> leave the 144/440 arrays about 15' above the 6 meter yagi. I'd actually 
> reduce the wind load on the rotator and top of the tower.
>
> Then maybe I could just fix what I have, not spend any money on it, and 
> have a reasonably good system.
>   
>>>> Impressive..BUT look at the specs...83 LBS and 69ft long
>>>> boom!!! 
>>>>
>>>>       
>>>>         
> Ahhh...That's not bad at all.  There's a tribander about 5 miles from 
> me... actually it's 20-10 with WARC bands That weighs about 240# 
> although the boom is only 40 some feet.  He hired a crane to come in and 
> set it.
>
>
>   
>>>>  
>>>>
>>>> Still, 14dbd on 6m??? YIKES! Don't need a band opening with
>>>> that monster!!
>>>>       
>>>>         
> It may be good for weak signal work and Aurora, but unfortunately that's 
> not enough gain (even as a quad array) to overcome the laws of physics.
>   
>>>> (Oh btw side note to Kelly, N5STK, it will handle 1500watts
>>>> ;)
>>>>       
>>>>         
> So it only works on low power? <:-))
>
> Oh, to be back out in the country with lots of room, a good job...OK, 
> I'd rather have a good income without the job.  I'm half way there. I 
> love retirement, but it could pay a bit better.
> Enough dreaming...back to the shop...
>
> 73
>
> Roger (K8RI)
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