Re: LF: Re: InV L Top wire config - Best Option ??

["Alan Melia" <alan.melia@btinternet.com>]

Hi Graham its not exactlyaerial weather here either :-((

The problem with unconventional "shapes" is you will have to just try 'em out. I have always concentrated on reducing ground loss as the most effective use of time and effort. Best done by measurement, and not urban myths :-))  Thats why I always plug a simple transformer coupled bridge, oscillator and receiver as a detector, noise bridges have never worked at LF for me ....probably too many BC stations close by. I also like bridge measurements......its probably an "age thing" :-))  I feel closer to the problem and able to employ some skill and maybe dexterity, even if I dont get the numbers on the readout of a VNA......at least I learnt to sense when the measurement "feels" right. It is the classic substitution measurement with passive references.

 

Alan

G3NYK

 

----- Original Message -----

From: Graham

To: rsgb_lf_group@blacksheep.org

Sent: Thursday, June 21, 2012 6:48 PM

Subject: Re: LF: Re: InV L Top wire config - Best Option ??

R Alan.

 

Horizontal  spread  ......missing  at the  moment ...  will  have  another  look  out  side  , when the  rain  stops ,  horizontal   open  box may  be  possible ..just

 

Tnx -G..

From: Alan Melia

Sent: Thursday, June 21, 2012 4:42 PM

To: rsgb_lf_group@blacksheep.org

Subject: LF: Re: InV L Top wire config - Best Option ??

Hi Graham it basically doesnt matter too much  :-))

The thing is to get as much wire as high as possible. Yes fold it back, meander it....spacings less than about 2 feet dont add much over a single wire. Drop the end if you have to but remember this may reduce the signal slightly in that direction....but it will increase slightly the capacity to ground. be careful of the dropped ends they are high voltage points and may not be "family friendly" ...... doubling the capacity to ground ( note ground....not lossy roofs/foliage underneath) will probably halve you ground losses. It will do very little to increase the radiation resistance.

 

Your diagram is difficult to read but running one of the wires directly under another will be of no benefit and may be worse than not having it......horizonltal spread is what you want, so pull it at least 2 feet aside before folding it back.......I think you get the idea.

 

Alan

G3NYK

 

----- Original Message -----

From: Graham

To: rsgb_lf_group@blacksheep.org

Cc: rsgb_lf_group@yahoogroups.co.uk

Sent: Thursday, June 21, 2012 4:17 PM

Subject: LF: InV L Top wire config - Best Option ??

InV  L  Top  wire  config  - Best Option ??

 

Any  thoughts on the  best  configuration  for the  top  wire ??

 

Tnx -G,