[Lowfer] WA overnight in London

Sun, 27 Jan 2002 12:56:50 -0500

Mitch; no fair talking 'shop' on "WA overnight" headers! Serousuly, I'm 
interested in your experience on larger than normal loops and the crossover 
point were you find no improvement in S/N performance with increasing size. 
Hmmm. That has a familar ring. <G>

>From: Mitch Powell <[email protected]>
>Reply-To: [email protected]
>To: <[email protected]>
>Subject: Re: [Lowfer] WA overnight in London
>Date: Sun, 27 Jan 2002 12:01:24 -0400
>
>
> > Mitch, tell us about this 20' loop. Is it multiturn, single or what'cha 
>got
> > up there???
> > 73's,
> > Mike>WE0H
>
>Hi Mike:
>Just took 80 feet of RG6/U - found the center and cut the shield. Taped and
>siliconed and reinforced this center point. Essentially made an 80ft ( 20 
>ft
>per side) square loop. Put a couple insulators 10 feet out from the center
>and threw a line up in a few trees about 40 feet up. Lifted it up, brought
>the verticals down 20 feet, and tied off. Where the coax met I added F
>connectors and a box with a trusty Burhans preamp and it seems to work very
>nicely from <<100 kHz to 500 kHz.  Nice signals from both East coast and
>West coast NDBs.
>So briefly - a 20 foot square coaxial loop - with preamp powered from 
>inside
>house, and hung in the trees.  (Armstrong rotator !)
>
>I have made similar loops before (up to 100 ft) and of course what happens,
>the signal increases - but so does the noise level. You can only go so far
>before the S/N ratio defeats the purpose of the larger loop.
>
>I find the KAZ (squashed KAZ) are as good, if not better, and are much 
>lower
>noise level antenna. See the site with the screen captures:
>http://technology.fanshawec.on.ca/tele354
>
>A description of the Burhans and untuned loops, etc is on
>http://technology.fanshawec.on.ca/tele410
>
>73
>Mitch VE3OT
>
>
>
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