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maco 5-element to stacked 5 or 8-element maco
- Thread starter 552fl
- Start date
As others have said in this thread, the 5 element is the best bang for the buck. Best gain for its size. An 8 element is a monster, and keeping it up in a windy environment is a real challenge. Ditto for stacked 5s. Plus you will need a premium heavy duty rotor, a well guyed tower, etc. Not worth it for what little additional gain you get.
- 399
- 399
It was stated in the other thread that the 7 element would have about 2 dB in gain over the 5 element.
To put this idea in perspective, two stacked 5 element yagi's would have about 3 dB gain over a single 5 element yagi.
After adding elements to a yagi, you have to increase the size of the yagi exponentially to continue to see the gains you see from just having a few elements. As you continue to add elements, the cost goes up at an exponential rate, while the additional gain goes down at an exponential rate. This is the reason few people tend to push HF yagi's past 4 or 5 elements.
The DB
To put this idea in perspective, two stacked 5 element yagi's would have about 3 dB gain over a single 5 element yagi.
After adding elements to a yagi, you have to increase the size of the yagi exponentially to continue to see the gains you see from just having a few elements. As you continue to add elements, the cost goes up at an exponential rate, while the additional gain goes down at an exponential rate. This is the reason few people tend to push HF yagi's past 4 or 5 elements.
The DB
DXman
Yes, that's 3100 degrees F. Nine yrs of hard work.
552fl
Just what are trying to accomplish? If you wish to just talk to people on earth - then a single 5 element will work.
If you need to talk to stations in other galaxies - then buy all means go to stacked 5's or bigger!
Just what are trying to accomplish? If you wish to just talk to people on earth - then a single 5 element will work.
If you need to talk to stations in other galaxies - then buy all means go to stacked 5's or bigger!
Shadetree Mechanic
Delaware Base Station 808
I believe the stacked beams will have a more narrow pattern whilst still maintaining good rejection off of the back. Or something like that.
It depends how they are stacked. Side by side has the same elevation angle but narrower beamwidth. Stacked one above the other has the same beamwidth as a single antenna but compresses the take off angle.
BJ radionut
Supporting Member and 6m addict
You're right DX man just go bigger I live out in the country plenty of room have two tall rohn towers ..have a bucket truck that goes to 65 ft so there's no problem putting up a bigger beam..
Shadetree Mechanic
Delaware Base Station 808
Now you know that we will need pictures when you put them up. Haha
Putting them up is not the issue. Keeping them up is the problem. Stacking a pair of 5 element yagis for 11m requires a fair bit of knowledge and skill to put it up right and make sure it stays up. VERY BIG effort for very little return.
Shadetree Mechanic
Delaware Base Station 808
No 220 yet, thinking about a small beam like a Sirio 4 element or Maco 5. If three is too many maybe I can help you out.
Try to download picture could not get it to work.if I decide to let one go you will be the first to know shadetree my friend
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