Re: LF: Re: More earth-mode tests and a puzzle

[Roger Lapthorn <rogerlapthorn@gmail.com>]

Jim

With an EFP the orientation did not seem to matter much at all and signals at 
least 20dB S/N could be detected in the shack. With the 80cm loop there was no 
signal detected in my house at all 3km from G6ALB. There was also zero signal 
detectable using my earth electrode system. In the street (presumably over 
pipes) the loop has to be flat on the ground for best results. At 3km range and 
QRSS3 the signal is strong (when received) and well above background noise 
using Spectran on settings of around 0.34Hz BW.

73s
Roger G3XBM


Via my 2.4GHz handheld (iPod Touch 4g)

On 3 Feb 2011, at 00:04, "James Moritz" <james.moritz@btopenworld.com> wrote:

> Dear Roger,
> 
> What is the actual limiting factor on reception with the different antennas? 
> I presume by "best results" you mean best SNR - but is the predominant noise 
> the band QRN or local man-made stuff?
> 
> Also, you mention that positioning of the loop was critical - in what way, 
> and how was the loop oriented with respect to the TX source?
> 
> Cheers, Jim Moritz
> 73 de M0BMU 
>