 The Endevco Model 4660A is a four-channel, bridge amplifier
designed for use with piezoresistive and variable-capacitance
type transducers.
Each channel has a differential input and a single-ended
output. The gain is adjusted from 1 to 100 by a 20-turn
potentiometer and a two-position jumper. The Output DC
bias can be adjusted +/-2.5 VDC by a 20-turn potentiometer.
The input DC imbalance is adjusted by a 20-turn potentiometer.
Each channel has a built-in 8-pole Butterworth low-pass
filter, providing -48 dB per octive rolloff above the
cutoff frequency. The filter can be selected in or out
by an internal jumper. The frequency response is from
DC to the upper -1% cutoff frequency, which is designated
by the dash number (-XXXX). The low-pass filter frequency
options are 20 Hz, 50 Hz, 80 Hz and 140 Hz.
Features:
• Four-channel bridge amplifier
• Adjustable gain 1 to 100
• Adjustable input imbalance and output
• Built-in 8-pole Butterworth low-pass filter DC bias
• Power and channel to channel isolation
• Small, rugged, light weight and watertight
Endevco Model 4660
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