AO shows my 6el monobanders to be 98.9% efficient. Where does this 50%
number come from?
John
----- Original Message -----
From: "Bill Wall" <billwall@eyecon-solutions.com>
To: "Jon Ogden" <na9d@speakeasy.net>; "xppq" <xppq@pyramid.net>;
<towertalk@contesting.com>
Sent: Saturday, November 16, 2002 12:51
Subject: Re: [Towertalk] IS Boom length the HOLY GRAIL ?
Hi Jon;
Consider the full wave Quad has about 1.8 db more gain than a 1/2 wave Yagi.
The Quad is quieter on receive and does not hear rain static. The efficiency
of the average 3 el Quad is in the 90% + category. The 3 el Yagi is about
50%. 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.
A few years ago Lew Mccoy W1ICP published an article in CQ magazine about
this. Boom length is gain, but there are other things that are more
important like, takeoff angle, frontal lobe pattern and so forth.
Bill Wall KC4UZ Antenna Mart
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