"ml" schreef in bericht
...
I guess its residential on 1/3 of an acre lots. Not real tight.
But the utilities are above ground and that probably doesnt help.
not sure if anyone realizes this but i've noticed that the adj controls
can sometimes be very very sensitive sometimes i've found that a
hair
kills the noise and if you blinked at that moment you missed it
dunno maybe it's just me
maybe you have a bad or dirty control? OR as Jan wrote previously the
variable resistor is not linear and the abrupt change you see it due to
the
variable resistor.
the control is good, it is on all the units prob a non linear
pot(resistor) linear taper? not audio taper or what ever but they all
seem to work like that 
on certain kinds of noise it sure works well
The phase control variable resistor is linear, but the relation between
phase
difference and resistor value is very non linear!
This makes it difficult to tune to the exact phase for deep noise
cancelling.
See:
http://www.pa0sim.nl/Phaser%2080%20-%2010%20meters.htm
That is why I use phase (and gain) control spreading.
73 Jan PA0SIM