Posted on Jan 22, 2013

This circuit features the ZTX450/ZTX550 transistors in a push-pull output stage. The following readings were taken at maximum volume: Input: 0.4 mV rms, Output: 1.8 V rms, Voltage gain: 4500, Max. output before distortion: 2.25 V rms -supply current ~ 3.5 mA, Zero output-supply current: 3.5 mA,

Click here to download the full size of the above Circuit.

Wattage: 0.034 W, Frequency response: 250Hz to 28kHz, MICROPHONE 2000 60mH

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