[TowerTalk] Triband Evaluation Query

[Joe Subich, W8IK]

At 10:19 AM 1/5/98 -0600, N4KG wrote:

>
>Cushcraft has two new antennas that utilize these principles.  The X7
>has 3 monoband driven elements with appropriately spaced monoband
>reflectors and a single trapped director on a 16 or 18 ft boom.  The X9
>has an additional 10M director and a second trapped director on a 28 ft 
>boom.
>

The X7 and X9 use a truncated log cell (4 elements) as the driver, not 
monoband driven elements.  Force 12 uses an open/closed sleeve and HyGain 
uses a full log cell.  All three designs are valid ways to provide an 
efficient driver structure covering three or five bands without the 
compromises and loss of traps in the high current driver elements. 



73, 

   ... Joe Subich, W8IK  ex-AD8I
       <w8ik@ibm.net>

"Hindsight is an exact science."


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