The LZ1AQ amplifier is NOT a differential input amp, rather it 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:[email protected]] On Behalf Of Wouter Jan Ubbels Sent: Saturday, January 31, 2015 12:28 PM To: [email protected] Subject: Re: [Elecraft] Elecraft Digest, Vol 129, Issue 41 Hi Paul, I can recommend LZ1AQ´s active loop antenna. See http://active-antenna.eu/ It offers a nice variety of antenna configuration options, and it plays very well here as a separate RX antenna at my urban & noisy QTH. The unit is of high quality, and very well documented. I am using it with my KX3 and a homebrew switchbox which uses reed relays for QSK switching, controlled by the KX3 PTT output taken from the ACC2 jack. 73, Wouter Jan PE4WJ > Message: 2 > Date: Fri, 30 Jan 2015 19:15:32 +0000 > From: Paul Barlow <[email protected]> > To: <[email protected]> > Subject: [Elecraft] Separate Receiving Antenna > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii" > > Dear Elecrafters, > > I have a very small and odd shaped garden in which to play Ham Radio. > I have a K3 (and a K2 and... ), I run QRP CW and I was wondering if > anyone had experience of using active loop antennas as receiving > antennas to lower the noise floor. I was looking at Wellbrook's > Website this afternoon, and I see that their loops get good reviews on > EHam. I was wondering what experience you guys might have with these > and similar antennas. > > 73, Paul EI5KI > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
