I was trying to get some comparative data on quad vs quagi antennas
for a club presentation. I would like to be able to compare Quads of a
given number of elements with Quagis of the same number. It is my
understanding that for short boomed antennas the quad will win out but
the quagi is best for longer higher gain antennas. Some numbers would
really help illustrate this but so far I have not found any
information on short quagis.

Jimmie

On Nov 4, 9:38 pm, JIMMIE wrote:
I was trying to get some comparative data on quad vs quagi antennas
for a club presentation. I would like to be able to compare Quads of a
given number of elements with Quagis of the same number. It is my
understanding that for short boomed antennas the quad will win out but
the quagi is best for longer higher gain antennas. Some numbers would
really help illustrate this but so far I have not found any
information on short quagis.

Jimmie

Jimmie, this is not a flame:
But, you intend to lecture to others and you do not even begin to
understand the subject - do you see a contradiction here?

There is no way this group can turn you into an instant expert by way
of one or two postings to this reflector... The possibilities of you
looking like an idiot in front of your friends are endless - all it
takes is one question from the audience where you try to wing the
answer, then someone points out the holes in your answer, and poof!

My best advice is for you to cancel your lecture and begin a bit of
testing on your own (become an expert)... Two meters is an easy band
to work with... Get a wood handle for a hoe, or some such, and drill
holes... Start with a yagi from the antenna hand book - let me suggest
3 elements to start with, and if you want more gain then go to 5 or 7
elements, i.e. always have an odd number of elements... Measure the
gain and the pattern at 0-45-90-135-180 degrees...
Then change the reflector to a quad element - repeat...
Then the driven, etc...

Then when you give the lecture you will know the material, you will be
able to show them the antenna(s), and your test data... And even if
you didn't get the answers you/they expect, you will be the local
expert...
cheers ... denny / k8do

....[snip]....
testing on your own (become an expert)... Start with a yagi from the
antenna hand book - let me suggest 3 elements to start with, and if you
want more gain then go to 5 or 7 elements, i.e. always have an odd
number of elements...

WHY always an ODD number of elements?

I can understand three: reflector, driven, and director, but I don't
understand NOT four: reflector, driven, 1stDirector, 2ndDirector ???

--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
NRA Life Member & Certified Instructor for Rifle, Pistol, & Home Firearm Safety
Also Certified Instructor for the Kansas Concealed-Carry Handgun (CCH) license

Hi Jimmie

Mt Cebik has some words on this.. I'll admit I didn't read it, only
searched for the word on his site.

http://www.cebik.com/vhf/qy.html

Might be a good place to start.

I note your reluctance to model antennas. This is however a great
technique you can deliver to your club members!

Cheers Bob VK2YQA


JIMMIE wrote:

I was trying to get some comparative data on quad vs quagi antennas
for a club presentation. I would like to be able to compare Quads of a
given number of elements with Quagis of the same number. It is my
understanding that for short boomed antennas the quad will win out but
the quagi is best for longer higher gain antennas. Some numbers would
really help illustrate this but so far I have not found any
information on short quagis.

Jimmie