Interesting, I found the following in the Icom r75 list:
Re: AOR LA 390 loop
It works well but doesn't pick up the signal as well as a long wire. On the
other hand, it is very quiet and good for a noisy RF environment. Although 
it
covers 150kHz up to 500MHz, I find it's best suited for under 10MHz, 
especially
for nulling unwanted signals.
Is it worth the $380.00 it sells for? Hmmm ... I feel it's $180.00 
overpriced
but there are not a lot of good alternatives, especially for indoors, ease 
of
operation, and noisy RF environments. I quite like it.
--- In

----- Original Message ----- 
From: "Martin McCormick" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, January 26, 2011 8:35 AM
Subject: Re: Really Big Transmitters


> Maybe we should change the subject line to Really Little
> Antennas. I don't know anything about that particular antenna,
> but amplified or active antennas have been around for a while
> and keep getting better mainly due to FET amplifiers with lower
> and lower noise figures.
>
> The only down side to an antenna like this is that when
> you use it indoors, it is going to pick up all the crud from all
> the gear you are running so you will have an even better way of
> listening to your switching power supply, that little switching
> circuit that makes compact fluorescent lamps go and lots of
> other hash generators.
>
> Also, if you live near a very powerful AM or FM radio
> station, you might discover that the powerful transmitter
> overloads the preamp in the antenna which could cause you grief
> by creating lots of mixing products far away from the frequency
> you are trying to hear.
>
> If you have a relatively quiet location, this antenna is
> probably fine.
>
> It sounds kind of interesting so let us know if you get
> one and listen through it.