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Endevco has launched a series of compact, lightweight, rugged airborne amplifiers, designed for use within demanding flight-test applications.

Operating from an onboard aircraft DC-power source, Endevco airborne amplifiers are designed for use with piezoelectric microphones and accelerometers.

The Endevco 2680M-XXX is a charge amplifier offering dual outputs – one biased and the other unbiased – both of which are adjustable with a common gain control.

Units are available with an optional low-pass filter.

Endevco model 2685V is a voltage amplifier for use with Isotron (IEPE) accelerometers, providing a constant-current power source to a transducer’s integral electronics while maintaining a two-wire connection.

The hybrid microcircuit construction of the Endevco 2680M-XXX and 2685V series allow them to be offered in a rugged, compact package with low power consumption.

Units have an output voltage proportional to input acceleration or sound.

Amplifier sensitivity is not significantly affected by input-cable capacitance.

Use of modular construction techniques permits versatility in gain and filter choices.

Accelerometers recommended for use with Endevco series 2680M-XXX and 2685V airborne amplifiers include Endevco model 7255A Pyrotron accelerometer; Endevco model 2271A/AM20 cryogenic accelerometer; the thru-bolt mounted Endevco model 2221F accelerometer; and the Endevco model 2510 piezoelectric microphone.

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