[DX] Yagi height and DX

Fri, 12 Apr 2002 14:31:44 -0600

IMHO, the C3S is the "most bang for boom" on a 12 ft boom
for 20, 15, 10.  The new XR5 looks like a GREAT design for
20, 17, 15, 12, 10 on an 18 ft boom.

Monoband REFLECTORS can be lined up with minimal interaction.
Lower frequency DIRECTORS act as inefficient REFLECTORS 
in front of higher band elements which explains why traps or
many additional 'sleeve' elements are needed to counteract
destructive interference from monoband directors in multiband
antennas.  

The 'monster' tribanders (e.g. C31XR on 31 ft boom) has
less than 2 dB more gain than a C3S on a 12 ft boom
on 20 and 15M  !

The CC X7 is another interesting approach with a Log Cell
for the Driven Elements and a single Trapped Director for
20, 15, 10 and full size reflectors for 20 and 17 on an 18 ft boom.

Tom  N4KG

On Fri, 12 Apr 2002 "anthony costa" <[email protected]> writes:
> You WOuld put 2 s-units on your signal raising the beam 20 feet.also 
> the ma5b is a low gain antenna.go out and get a force 12 c2s up at 40 
> feet and look out.you WOuld be suprised.

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