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

[Roger (K8RI)]

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)