"Jimmie D" wrote in message
...

"Denny" wrote in message
ups.com...
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

Denny,
First of all I never said I was giving a lecture but I can see how this
could be a logical assumption. I dont need to be an expert or want to be
one. I just said I wanted to collect some data. If I were comparing a quad
to a yagi my task would be no problem. I just cant find any info on a 4 or
5 element quagis. My assumption is that a quad would be the higher gain
antenna when this number of elements are involved. I can understand why
this information would be hard to find but thought that if there is any
place it can be had it is here at RRAA. I have found one reference that
implies that a quagi by definition is 6 elements or more.

Like most hams I have no way of making the measurements you suggest. It
must be nice to live in a world where you would assume I could.

All I really need is data I asked for. If someone aske me a question I
dont know I have a good answer for them, "I dont know". I dont "wing it".

Sincerely
Jimmie

Hi Jimmie

Do you use EZNEC?

Jerry