[Lowfer] UWL loop

[riese-k3djc at juno.com]

I wonder how an aluminium loop would work at 10 inches Dia. Assuming
you had a shop and could braise ( ? ) the aluminum with low loss
connections
wouldnt using irrigation tubing make fer a workable solution ? 

there would be a difference in RAC between copper and the aluminum but
the price 
should be the advantage as well as a lighter loop.


what could be done with home made LITZ ,, I'm thinking many strands of,
say 22 gage 
plastic insulated wrapped and given a slight twist and long enough make
the loop

with the increasingly better CDX at LF it might make fer a fun test

Bob  K3DJC


On Tue, 11 May 2004 12:08:13 -0400 "Bill Ashlock" <ashlockw at hotmail.com>
writes:
> > > I'm interested in knowing what you loopers think of a 15m loop 
> for 185 
> >kHz
> > > -- 15m circumference, though, not diameter.
> 
> Not to put down the common "how am I coming in" approach, the 
> difference in 
> signal strength at a distant site for a loop with a 15M diameter vs 
> a 15M 
> circumference is basically the ratio of the two areas. This assumes 
> the same 
> conductor type and both loops are at least 6ft above ground at their 
> lowest 
> point. The area for the 15m cir loop is ~180 sq M and the area for 
> the 15M 
> diam loop is ~18 sq M so you are giving up 10X or 20 db.
> 
> The only way to beat this huge deficit (forget the multistrand 
> approach, 
> it's too unstable) is to reduce the loop conductor Rac loss by 
> increasing 
> the diameter of the conductor to the square of the loop diameter 
> ratio. 
> Assuming 0.1" for the larger loop conductor the smaller loop would 
> have a 
> diam of .1 *100 or 10 inches!
> 
> Bill
> 
> >I did it a few years ago, and while it worked, it may not be worth 
> the
> >effort. I think Dex did copy the thing at QRSS120 in the dead of 
> winter. I
> >was using a 4-wire cage of #8 wires at the time.
> >
> >It does have the advantage of being quite legal, though.
> >
> >John A.
> 
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