Evan,
Not much needed to operate it. It's just a notch, tune it to reject the
signal you want to get rid of. There's no on/off--just tune it outside the
passband if it's not needed. The schematic is the same as the 75S3. It's a
basic Q-Multiplier circuit.
Greg K3EWZ

"K9SQG" wrote in message
...
Would anybody be able to help me with operating info and schematic diagram
for
a Waters rejection tuning installed on a Collins 75S1?

73s,

Evan