I want to thank W8JI, N6RK, W5VU and Jim Lux (callsign?) for their
responses. Apparently this can be done but due to technical issues, is
complex. Having the need to use 2 antennas on 2 bands in an SO2R
contest setup makes the possibility of an 80 4 square inside of a 160 4
square, rather impractical.
Back to the drawing board - thanks for all who responded!
----- Original Message -----
From: "Rick Karlquist" <firstname.lastname@example.org>
To: "Robert Shohet" <email@example.com>
Sent: Thursday, June 10, 2004 9:04 PM
Subject: Re: [TowerTalk] 80 4-square inside a 160 4-square? Pros and Cons
> Robert Shohet said:
> If I did this, then my existing 80 4 square
> > (inv l's) would be inside the 160 4-square.
> > I can't imagine this would be good for the 80 meter 4-square
> > Has anyone out there actually had an 80 4-square inside a 160 4-square
> > and
> > can tell me about actual changes in performance (that they have
> > of
> > the 80 4-square and what they were?
> I have 80 and 40 meter concentric 7-hex arrays. The 80 meter
> verticals have insulators at the midpoint with latching vacuum
> relays across them. I have to open up the relays on the 80 meter
> verticals when on 40 meters and also float them from ground.
> Failure to do this would result in severe pattern distortion on
> 40 meters. The same general principle should apply to concentric
> 4 squares.
> > Are these problems (if any) worsened by using BOTH antennas at the same
> > time
> > on different bands with two different radios? Both 4-squares would be
> Difficult. You would have to use traps instead of relays.
> The traps would act as loading coils on 80, so you would want
> cancel the inductance with a series capacitance on 80. This will reduce
> bandwidth, which is one reason why I don't do it that way.
> Rick N6RK
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