The article is in vol. 3, p37-41. Title "Phased Verticals with Continuous
Phase Control" . I believe W6CCP has built and used the device with 2
separate 20m beams. It uses a continuously tunable pi network with variable
L and C's, 2 ferrite core xfmrs, and 2 DPDT switches. The antenna xmsn lines
are odd multiples of 1/4 wavelength for current forcing. I have thought
about building one and may do that when the snow melts here, Hi. There is
also a very interesting article about building a 4 sqr receiving array for
160 using 20 ft long inductance loaded verticals. W7EL is one of the authors
and it was modeled using Elnec.
73, Dan, N5AR
----- Original Message -----
From: "larryjspammenot@teleport.com" <larryj@teleport.com>
To: <towertalk@contesting.com>
Sent: Saturday, March 14, 2009 8:47 PM
Subject: Re: [TowerTalk] Phased Vertical Follow-up
>I do have the ARRL Antenna Compendium volumes, except for Vol #5 and #7, so
>I'll look through those to see if the article is in of of them. Someone
>mentioned mounting the couple of verticals above a metal roof, but my
>garage is a typical "Stick-built" construction, with 2X6 construction,
>composite shinge roof, and effectively no metal. I'll have to use tripods,
>radials, etc.
>
>
> -----Original Message-----
>>From: jimlux <jimlux@earthlink.net>
>>Sent: Mar 14, 2009 11:02 PM
>>To: "larryjspammenot@teleport.com" <larryj@teleport.com>
>>Cc: towertalk@contesting.com
>>Subject: Re: [TowerTalk] Phased Vertical Follow-up
>>
>>larryjspammenot@teleport.com wrote:
>>> I've been wanting to try a pair of phased Butternut HF6V vertical
>>> antennas for 40-Meters, mounted on my garage roof. I already have them,
>>> that's why I'm looking at Butternut. The garage is 40 feet long, so I
>>> trust there's enough spacing for proper operation.
>>>
>>> Looking at that Hy-Gain Engineering report for Amateur Phasing (I picked
>>> up my copy back in the 1960's), I know any verticals should work okay,
>>> not just the Hy-Gain ones. However, since that report and procedures
>>> info for phasing two or three vertical antennas was written, there have
>>> been improvements to the test procedures, computer modeling, and
>>> probably much discussion as to how best to tackle a simple 2-antenna
>>> vertical array used for just 40-Meters. That Hy-Gain report is given in
>>> the last four pages of the link shown earlier. I'd be interested in any
>>> suggestions or improvements before I look at doing it as shown in this
>>> Hy-Gain report.
>>>
>>>
>>What about the scheme in the ARRL antenna compendium from the EE prof..
>>Basically a pi network that gets adjusted and a DPDT switch to flip the
>>phasing. You adjust for a null on the desired station, then flip the
>>switch.
>>
>>
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