You have to remember that SWR is not the only parameter to be concerned
with.  One example of many, is this.  How did your pattern change?  When I
ordered my current yagi, the SteppIr DB36, I ordered it with 2 passive
elements for 6 meters.  They work in conjunction with 4 moveable elements,
making a total of 6 elements on 6 meters.  However, it turned out that I
couldn't use my DB36 on 6 meters because of issues raised by a custom and
externally mounted 50 ohm to 25 ohm balun.  Since my DB36 would not work on
6 meters, I had two choices.  I could forget about using 6 meters, or I
could put up a separate yagi for 6 meters, which is what I did.  I bought a
9 element 6 meter yagi with a 40 foot boom.  The 6 meter yagi was mounted
above the SteppIr, but when we were checking 6 meter performance, we
discovered that the 2 passive 6 meter elements were screwing things up.  To
straighten out the pattern on the 6 meter yagi, the 2 passive elements on
the DB36 must be removed.  So, until we actually made the changes, we
couldn't predict what was going to happen when the second yagi was
installed.  If anyone wants additional info regarding my 6 meter experiences
with my current yagis, it would be best to take it off list.

73


Alan R. Downing
Phoenix, AZ


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of John Miller
Sent: Friday, August 30, 2013 11:52 AM
To: [log in to unmask]
Subject: Re: Antenna questions

My SWR didn't change when I put the wire up. The vertical stayed exactly as 
it was. I can't say it would stay that way for everyone but as checked with 
my TW-1 and double checked by a friend on an MFJ analyzer, there was no 
change.
----- Original Message ----- 
From: "Jim Gammon" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, August 30, 2013 2:18 PM
Subject: Re: Antenna questions


> John, do you have any records of your SWR before and after the
> addition of your dipole? Seems like there are pultiple opinions
> about this issue.  Unless you are an antenna builder or company
> that has appropriate testing conditions, it's really difficult to
> not have some compromises with antenna setups.  Thanks, Jim
> WA6EKS
>
> ----- Original Message -----
> From: John Miller <[log in to unmask]
> To: [log in to unmask]
> Date sent: Fri, 30 Aug 2013 14:03:47 -0400
> Subject: Re: Antenna questions
>
> Mine runs about that far from my vertical and the vertical was
> there before
> the dipole, I can't say I noticed any difference at all.  In fact
> mine might
> be closer, more like 3 feet.  As long as they don't touch, where
> the dipole
> is horizontal and vertical is, well, vertical, it shouldn't be
> any problem.
> Like I said, I don't have any problem here, I know others who
> have done the
> same thing and not had any problem.
> ----- Original Message -----
> From: "Jim Gammon" <[log in to unmask]
> To: <[log in to unmask]
> Sent: Friday, August 30, 2013 1:41 PM
> Subject: Antenna questions
>
>
> Hello list.  I have some Antenna questions.  I have a multi-band
> dipole antenna that I am using for 10 through 80 meters.  I want
> to put up a vertical antenna that will work on 10 through 20 or
> maybe 40 meters.  Am not sure about it's coverage because
> someone
> gave the vertical to me and I don't have an accessible manual.
> Anyway, my question is that, when the vertical is up, the dipole
> will cross the plain of the vertical maybe 4 to 5 feet from the
> vertical.  Do any of you folks think there will be any
> significant adverse interaction between the dipole and vertical.
> Should I try to locate the vertical farther from the dipole? Am
> pretty restricted on options.  Thanks for your comments  and 73,
> Jim WA6EKS
>