[Lowfer] Dummy Load Antenna - Followup Question About using a Single 1/4 Wavelength Radial

[Don Merz]

 blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px #715FFA solid !important; padding-left:1ex !important; background-color:white !important; }  Hi mike.  Can you email me that PDF? Sounds like something I need to read.Also see QST August 2011 The Doctor Is In for a short discussion of elevated vs ground radials.In the April 1988 Ham Radio magazine, Bill Orr talks about "Vertical monopoles with elevated radials". He follows that up in Ocatober 1988 with the idea of using trapped dipoles as radials. But that idea goes way back to May, 1971 Ham Radio which on p62 shows a design for an elevated multi band ground plane using trapped dipoles.
Interesting stuff.
Don Merz, N3RHT


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On Friday, October 13, 2017, 9:57 AM, Michael Sapp <wa3tts at verizon.net> wrote:

Andy:  Al Christman's (K3LC) first QST article on elevated verticals 
discussed elevated vertical antennas with one and two radials, and Rudy N6LF 
cite's Al's work in his
online PDF "A closer look at Vertical Antennas with Elevated Raidials.  So 
a 1/4 wave counterpoise radial may be worth trying even if you cannot 
elevate it (think about ground skin depth at 630m and down).  Likely it 
would work better if elevated a few to several feet.

 Chris and JB suggestion of improving the ground coupling near the feedpoint 
I would agree with as well.  I saw an improvement on my EWE antennas for 
receive when I added a perimeter ground wire to the 4 corner ground rods of 
my orthogonal EWE antenna pair along with the "X" ground wires and ground 
rod in the center between the 4 corner ground rods.

So chicken wire under the monopole feed and one 1/4 wave counterpoise wire 
might be worth a try...

73 Mike wa3tts


----- Original Message ----- 
From: "Andy - KU4XR via Lowfer" <lowfer at mailman.qth.net>
To: "600 meter group" <600mrg at w7ekb.com>; "1750 Meter lowfer list" 
<lowfer at mailman.qth.net>
Sent: Friday, October 13, 2017 1:28 AM
Subject: [Lowfer] Dummy Load Antenna - Followup Question About using a 
Single 1/4 Wavelength Radial


> OK Gentlemen:
>
> So, I need to get the Vertical portion as high as I can ( that I already 
> knew ). I need to Minimize the slope angle
> on 2 of my top load wires...( I was aware of the pinch off problem, and, 
> I think I can accomplish that ) .. The lay
> of my property makes it a challenge because from the Antenna mast; the 
> ground starts going down hill in every
> direction, and very steeply.. 100 feet from the mast, could require a 50 
> foot high tie off point.. not impossible,
> but difficult.. I need one of those flip sling shot / zebco 33 combos to 
> shoot fishing line across higher branches ..
> the darned thing just costs too much commercially... I received my order 
> of wire today so I have 750 feet for
> more top loading .. I do have the 33 foot semi-circle radial field that I 
> put down in 2009 when I ran my lowfer
> beacon.. I can put down " some amount " of radials but I will be limited 
> for various reasons, and leave it there
> on that... For the record, last fall I used electric fence wire, and put 
> down 6 - 110 foot long radials - each spaced
> 10 feet apart, and ran a perimeter wire around them. The radials ran 
> underneath 1 single top load wire.
> The radials ran back to the ground rod and terminated with the existing 
> small radial field... On Receive Only;
> I ran Fall, Winter, and Spring until mowing time, and noticed NO 
> improvement in reception.. That was quite
> the disappointment, and made me think that radials that would really have 
> an effect would not be feasible
> for me... So let me get to another question.. The consensus is to " put 
> down anything, any length, run it
> anywhere - out of the way places - just get something on the ground as a 
> radial... Here is what I have on hand.
> I have several hundred feet of RG-59 coax.. enough to easily lay out 1 
> wire, 1/4 wavelength long.. BUT ! I will
> have to run it along the edge of mine and my brother-in-laws property, and 
> it will be no where in proximity
> of the top load wires... I will tie the center, and shield together, and 
> string it thru the edge of the woods
> on the ground.. I will terminate it to the ground rod I use for the 
> current radial field ... *** Question: will
> " 1 " long wire ( 1/4 wavelength ) running in an out of the way direction, 
> benefit in any way ?? I have a
> second path that I can run a coax at least 1/4 wavelength long, and be 
> hidden - out of the way.. Has this
> approach been tried, and proven to benefit ? If it has, I will expend the 
> time, and effort to do this ...
> Comments on this please... and thank you for the wealth of information so 
> far..
>
> 73 all: Andy - KU4XR
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