Yes, maximum selectivity is when the plungers are fully withdrawn. Bandwidth
is on the order of 100Hz.

Ralph
VE3BBM
"Antonio Vernucci" wrote in message
...
I would assume that maximum selectivity occurs when the 85 kHz IF
trasformers actuators are fully pulled up (maximum distance between primary
and secondary windings).

Can any one please confirm or deny?

73

Tony I0JX