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maco 5-element to stacked 5 or 8-element maco
- Thread starter 552fl
- Start date
https://www.worldwidedx.com/threads/uploading-pictures.233113/#post-636162
Thank you shadetree I'll try it when I get home tonight off work.. definitely not trying to stacking if I do anything it would be a bigger Beam
Hello All: A good friend of mine insists on having a 7 element beam antenna. I tried to talk him out of it by using a 5 element yagi beam Antenna that works for just great.
I talk to the weak stations in the South Pacific Islands, while rejecting the big boys out of the southern states with all their steam.
The 7 element yagi beam antenna will half to have a more BIG EXPENISEREER Rotor and Tower. The gain is only a few dB in gain and in rejection at the expense way more money. But your allowed to be a nut ball on this stuff if you have the money.
Experience has shown that starting out small and working your way up to the big stuff is the only way to go. I then suggested a crank up/down tower that can be tilted down as this is way more money and saves going to the emergence ward. Buy a already in production 7 element yagi beam with a Balun and Hairpin Matching, what is called direct feed to the driven element. SEE:
https://www.m2inc.com/FG11M7
For me to build and have the materials shipped to me to build, test, and ship back to the south, costs way more than the $1500.oo plus shipping these guys want for their 7 element yagi beam antenna.
They also sell a 5 element yagi beam antenna, for a little cheaper. Again NOT using a single Gamma Match! But using the Balun and Hairpin matching system.
You can call the factory and get the poop on the stacking distances and I am sure they can suggest a Rotor and Tower. $$$$
Good luck.
Jay in the Great Mojave Desert
I talk to the weak stations in the South Pacific Islands, while rejecting the big boys out of the southern states with all their steam.
The 7 element yagi beam antenna will half to have a more BIG EXPENISEREER Rotor and Tower. The gain is only a few dB in gain and in rejection at the expense way more money. But your allowed to be a nut ball on this stuff if you have the money.
Experience has shown that starting out small and working your way up to the big stuff is the only way to go. I then suggested a crank up/down tower that can be tilted down as this is way more money and saves going to the emergence ward. Buy a already in production 7 element yagi beam with a Balun and Hairpin Matching, what is called direct feed to the driven element. SEE:
https://www.m2inc.com/FG11M7
For me to build and have the materials shipped to me to build, test, and ship back to the south, costs way more than the $1500.oo plus shipping these guys want for their 7 element yagi beam antenna.
They also sell a 5 element yagi beam antenna, for a little cheaper. Again NOT using a single Gamma Match! But using the Balun and Hairpin matching system.
You can call the factory and get the poop on the stacking distances and I am sure they can suggest a Rotor and Tower. $$$$
Good luck.
Jay in the Great Mojave Desert
Already have plenty of big towers and have the big rotor...there is a guy a few towns away from me that has a 7 element and he talks and can receive better van my maco 5.. was just asking for some advice so I'll probably get a bigger antenna and maybe a metal tube box . Came into some extra cash burning a hole in my pocket you know there's lots of nut balls out there.. go big or get out of the damn saddle
I would go for 8 over 8
I would never mount a beam for 11 meters Horizontal since it kills all of your local mobile & most base station signals because of the 20 plus db of attenuation it has from a vertical signal.You can work plenty of skip on a vertical beam & still hear the locals as well.Skip signals change polarity when bouncing around so I don't see the advantage of being Horizontal when the band is pretty much Dead most days for anything other than locals?
SIX-SHOOTER
I would never mount a beam vertical 
Mike
Mike
The whole purpose of horizontal polarity is to accomplish:
1- Reduction of vertical signals that interfere with communication
2- Reduction of noise, most man made noise is vertically polarized
3- Increase the far field lobe of the transmitted signal
As far as number of elements & gain go after 4 elements the amount of gain
diminishes a lot .75 for the fifth- . .5 for the sixth- .25 for the seventh.
The spacing of the reflector and the driven element affect gain more than number of
elements, the length of the boom plays an important role in a yagi.
As far as band width the diameter of the elements determine that, thicker is better.
You guys that have been in the game a while remember the Wilson Long John?
It was the biggest bad ass 11 meter antenna you could have back in the 70's
The length of the boom is what gave it tremendous gain, not the number of elements.
http://cb-antennas.com/?page_id=189
Here's your plans HSPD/David use to check-in on occasion, been a spell since I seen him though.
All the Best
Gary
PS: Vertical with this boom length will be an issue as the boom supports, I would think will tend to make the construction interesting. The boom supports and the vertical elements any "flex" at all and it will trash the antenna.
Horizontal only way to go.
You want better vertical preformance, stacked 4's... IMHO your only choice is to stack them side by side.
I remember the days of guys trying to run vertical stacked 5's or larger...they did not stay up long.
They also would have BIG issues with rotors, the wind loads are tremendous...and your in FLA!
All the Best
Gary
Here's your plans HSPD/David use to check-in on occasion, been a spell since I seen him though.
All the Best
Gary
PS: Vertical with this boom length will be an issue as the boom supports, I would think will tend to make the construction interesting. The boom supports and the vertical elements any "flex" at all and it will trash the antenna.
Horizontal only way to go.
You want better vertical preformance, stacked 4's... IMHO your only choice is to stack them side by side.
I remember the days of guys trying to run vertical stacked 5's or larger...they did not stay up long.
They also would have BIG issues with rotors, the wind loads are tremendous...and your in FLA!
All the Best
Gary
I flip my Sidewinder 6 horizontal for DX tawkn, and flip it vertical to communicate with the natives.
Same reason they sell 3cx15000 and 20000...someone always has deeper pockets.