Krohn Hite 3550

The 3550 Variable Filter is a multifunction filter that offers band-pass, band-reject, low-pass or high-pass operation in a single piece of equipment. The mode of operation can be selected by a front panel switch. The cutoff frequency is continuously adjustable from 2Hz to 200kHz. Features: Butterworth or Low Q response characteristics Calibration accuracy: ?5% Insertion loss: 0 dB Attenuation slope: 24 dB per octave Maximum attenuation: 60 dB Hum and noise: 200 ?V Bandwidth: 2Hz to 3MHz