[Lowfer] MP Loop antenna reconfigured

[Andy - KU4XR]

>There is some discussion on "How" you would tune it
> and in reality will it help in bespoke geographic and ground
> conditions 

The first thought that popped into my head was a variometer in 
series with the radials with the vari. between the radials, and
the common ground point... THEN.. I thought; maybe another way,
would be to place the variometer " across " the radial field which
would make for a Tunable LC circuit if there is a way to make the
radials " look like " a capacitor to the variometer, and not a
" dead short " .... Strictly from a laymans standpoint, and with
no experience in doing such.. Could a capacitor be placed in series
with the variometer, and connected the the radials in some fashion
as to allow for " tuning " the radial system to resonance ?? 
( if there is such a thing at LF for a short Radial system )...

Andy - KU4XR



--- On Fri, 12/7/12, Laurence KL1 X <hellozerohellozero at hotmail.com> wrote:

> 
> Good questions for Mitch Andy - Ive been asking questions on
> radials and screening to John TAG and Jay and John found an
> old paper that says (empirically) that a tuned screen under
> the loop should reduce "(dilectric ground) losses by quite a
> few dBs , but even a screen of say 1.5m width by just the
> length of the lower loop will reduce losses even if it isnt
> tuned. There is some discussion on "How" you would tune it
> and in reality will it help in bespoke geographic and ground
> conditions ~ Im, before the heavy snows come (we still dont
> have any here in Alaska would you believe) Im going to lay
> out some 200 ft long by 6ft wide welded mesh fencing pinned
> to the ground and see if it makes any difference - empirally
> I think John tried it with a small sized screen and saw no
> difference -  Ill have a play in any case, and see what
> currents are flowing -  and at the same time looking to
> increase the size of the loop without adding the same
> additive ground losses and getting no where :
>  -)   If I dont get anywhere Ill probably
> change the config into a Inv L and see if a  base
> loaded top cap does better at these lower temps without the
> Tree sizzle hopefully - I have a well casing and an
> estabilished screen close by I can tie into
> -   Laurence KL 1 X  WE2 XPQ
>  > Date: Fri, 7 Dec 2012 15:33:42 -0800
> > From: ku4xr at yahoo.com
> > To: lowfer at mailman.qth.net
> > Subject: Re: [Lowfer] MP Loop antenna reconfigured
> > 
> > Mitch:
> > 
> > Thanks for the pictorial of the loop.. I have been
> trying to 
> > mentally picture what you were doing, and the diagram
> cleared
> > it up for me.. 
> > 
> > I do have a couple of questions if you can take the
> time to
> > address them..
> > 
> > #1 How high above ground is the bottom side of your
> loop ??
> > 
> > #2 Do you have a Radial Field - of any sort -
> underneath, or
> > leading out from under the loop ?? And if so; will you
> describe
> > how you have the Radial Field laid out on the ground
> ??
> > 
> > Thanks OM for your time and reply to the list, as I'm
> sure there
> > are others who will be interested in your
> description..
> > 
> > 73, and Merry Christmas to you and your family from:
> > 
> > Andy - KU4XR - Friendsville, TN.
> > .htm
> > > Post: mailto:Lowfer at mailman.qth.net
> > > 
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