The link http://active-antenna.eu/ is to the LZ1AQ loop amplifier.

The LZ1AQ amplifier is NOT a differential input amp, rather the input  is
referenced to ground.

This can have significant issues as it relates to common mode noise.

As a result of my research, I ended up with a Pixel loop.  The amp has great
characteristics, differential input, uses an A.C.  wallwart for low noise,
and the install instructions isolate the amp from any ground.  

The loop interface also has a control line input from your rig, that
controls an internal relay, so the amp is protected when you transmit.  The
loop was designed by hams.

The mechanical design of the loop is excellent, using welds at the aluminum
joints.

I have no interest in the Pixel company, just a very satisfied customer.  So
satisfied, I bought two of them and phase them with a DX Engineering NCC-1
phaser.

Jim
W6AIM



-----Original Message-----
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Morgan
Bailey
Sent: Saturday, January 31, 2015 11:43 AM
To: Benny Aumala
Cc: Elecraft Reflector
Subject: Re: [Elecraft] Separate Receiving Antenna

Depending on the size of your lot you could also try a very short beverage
antenna.  I use a 160 foot unterminated wire through a 6:1 binocular core
transformer and feed it with 75 ohm coax.  It is up about 4 feet off the
ground.  It works surprisingly well on 20 through 10 meters.  It's
performance is marginal on 30 and 40 but sometimes it helps with band noise.
It may as well be a dead short on 80.  It is not ideal in any case, but it
was cheap and has helped with my horrible power line RFI problem.

On Sat, Jan 31, 2015 at 1:36 PM, Benny Aumala <benny.aum...@gmail.com>
wrote:

> Small large band RX loops are commercially available, but freight 
> costs makes them prohibitive expensive.
> You may approach it with kits, too.
> Look for VNorton here:
>
> http://www.qrp-shop.biz/epages/qrp-shop.sf/en_GB/?
> ObjectPath=/Shops/qrp-shop/Categories/%22DL-QRP-AG%
> 20Baus%C3%A4tze%22/Aktiv-Antenne
>
> and another interesting:
>
> http://active-antenna.eu/
>
> Both let you to make loop yourself.
>
> This is good for RX as it is broadband.
> TX antenna for limited space is Small Magnetic Loop.
> Big disadvanage is tunable small bandwidh. Even this can be made 
> automatic to follow VFO:
>  https://sites.google.com/site/lofturj/
>
> Benny   OH9NB
>
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