QRMSTOP.BMP

This circuit was developed by G4WMX and the late GW3DIX.
It was later marketed by SEM in the Isle of Man as the QRM Eliminator.
(It's own was a regular on the net we used to take part in).

 



[USEAGE]

You need to have a "noise" antenna.

The best noise antenna is an antenna which receives the interfering signal
the strongest!

There are 3 controls, BALANCE,PHASE 1 and PHASE 2.

The idea is that you try to keep the balance control as far over to the main 
trx antenna as possible whilst using the 2 phase controls to steer the QRM 180ø
degrees out of phase to cancel itself out and leaving the wanted signal alone.


[DOES IT WORK?]

YES!
ABSOLUTLY!
BRILLIANT!

I have a homebrew version here.

It is TOTALLY possible to eliminate an S9+60DB signal and listen to an S4 signal
with complete ease.

It's all a case of undertstanding the 3 simple controls. If you don't then you
just attenuate the wanted signal !

It works perfectly on QRM, jammers etc just so long as both signals retain their
phase relationship.

