[Lowfer] Der Bigger Loop

[Mitch Powell]

 At what point does increasing loop
> diameter
> not result in meaningful increase in S/N?.
> There is a condition on 10 GHz EME where moon noise becomes the limiting
> factor
> on a receive system's noise temperature.Bigger dish does not help.
> 
> Dale W4OP

Dale - just a quick copy of an earlier e-mail I sent as brief answer to the
same question about untuned loops -  Based on nothing more than using them
for the past seven-eight years. I think John might be saying the same thing.

Q.  What magnitude of increase do you see between the various sizes of
loops, like 4', 6', 8', 12', etc.?
A.  I had great results with the 6 foot hard-line. It was about the time of
the original article by Mitchell Lee. I copied HAO ( French Polynesia ) and
Easter Island, and NDBs coast to coast.  The other extreme is the 12 footer
- shown on the web site. It's a brute to handle - lifting over your head at
the top of the pole - while trying to drop it on the pipe ! !
It is very sensitive, very directive and I think it approaches ( or has
passed ) the law of diminishing returns. When I switch to the 7 footer - I
hear the same signals, but with less ambient noise level.
I would not build the 12 footer again. I would stop at 7 - 8 feet. It is
more than adequate, unless you are fortunate enough to have a great, quiet,
rural site.

73
Mitch