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Stacking three A99`s
- Thread starter murdog
- Start date
Stacking 3 A99's??? Horizontally?
I would put them in phase with each other (1/2 wavelength apart on it's own masts) vertically with lots of ground radials.
I would put them in phase with each other (1/2 wavelength apart on it's own masts) vertically with lots of ground radials.
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That's what I was referring to about stacking 3 A99's vertically being ridiculous. At 72 ft, there wouldn't be enough spacing between all 3 antennas yet barely 2 antennas.This would cause phase cancellations.
You can play with the phase angles to some degree (no pun intended 
) to allow for what you want to achieve. Spacing can be adjusted outside the generally accepted 1/4 wave multiples. A good setup is 1/4 wave spacing with 135 degree phasing. In any event I am talking about slacing horizontally and not vertically. A99s vertically spaced is borderline crazy.
) to allow for what you want to achieve. Spacing can be adjusted outside the generally accepted 1/4 wave multiples. A good setup is 1/4 wave spacing with 135 degree phasing. In any event I am talking about slacing horizontally and not vertically. A99s vertically spaced is borderline crazy.
Sell 2 keep one. Take proceeds from 2 sold a99s put toward building/buying a BEAM. Mount beam horizontal w a99 above. Done.....just my. 02
All ready have two horizontal beams and one five element quad....yes three towers just try`n to use up the extra a99`s.
Didn't realize you were working with an 11 meter antenna farm
Have some fun and experiment...after all that's what's it all about.
Sell all of them and use the money to take the wife out for a nice evening. It will pay dividends the next time you want another antenna. LOL
That is just at the cabin Captain more around here at home ....the wife went south with the dog years ago so just house keepers for now on ...but get the drift !!! .
Oh it`s not just an 11 meter farm have wire up and lots of it for all the hf bands ...it`s all a hobby and fun .Didn't realize you were working with an 11 meter antenna farm
[QUOTE="murdog, post: 549648, member: 7163" just try`n to use up the extra a99`s.[/QUOTE]
put one of them on top of your tallest tower,,,, they make great lightin rods and will save your real antennas.......
splatters that fiberglass into millions of pieces
put one of them on top of your tallest tower,,,, they make great lightin rods and will save your real antennas.......
splatters that fiberglass into millions of pieces
put one of them on top of your tallest tower,,,, they make great lightin rods and will save your real antennas.......
splatters that fiberglass into millions of pieces[/QUOTE]
Agreed. I saw the after effects of a strike. It was mounted on the eve of a friends house. Besides blowing a hole in the roof and following the coax down to the kitchen where the radio was it blew half the cabinets off the kitchen walls and set the house on fire causing well over $30,000 damage. We never did find much more than some splinters and the metal mount that was bolted to the pipe.