Bill Wall wrote:
>Consider the full wave Quad has about 1.8 db more gain than a 1/2 wave Yagi.
>
where is this from?
>The Quad is quieter on receive and does not hear rain static.
>
a given, while I have never done a side by side this is an agreed upon
benefit og the quad
>The efficiency
>of the average 3 el Quad is in the 90% + category.
>
sez who?
>The 3 el Yagi is about
>50%.
>
sez who??
>Put 1000 watts on the Quad and you have apprx. 900 watts. Put 1000
>watts on the same Yagi and you have aprrx 500 watts out. The power is lost
>in resistive heat.
>
I assume these are based on the above presumptions
>A few years ago Lew Mccoy W1ICP published an article in CQ magazine about
>this.
>
...uh oh - time to put on the boots
>Boom length is gain, but there are other things that are more
>important like, takeoff angle, frontal lobe pattern and so forth.
>
>
Finally I agree with you, Bill - but where do you get those gain and
efficiency percentages?
The folk lore I heard whilst walking up the hill was that having a quad
versus a yagu was like buying an extra element - if you had a 3 element
quad it was like a 4 element yagi - except for the maintennance which is
vitrually nil for a correctly built and installed yagi...so...build
yagis with more elements to offset the advantage the guy with the quad
had and don't have to deal with the numerous maintennance issues a quad
represents!
73,
Jim, K4OJ
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