Resistor change

Resistor change

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Resistor change in ECM Mic Preamplifier schematic diagram. The electret condenser microphone (ECM) contains a very sensitive microphone element and an internal FET preamp, a power supply in the range 2 to 10 volts DC is therefore necessary. Suitable ECM’s may be obtained from Maplin Electronics. Although the schematic is drawn showing a three terminal ECM, two terminal ECM’s may be used, the following page in the practical section shows the changes.

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1 Title: Resistor change
2 Upload by: Amplifier Circuit
3 Upload date: August 19, 2011
4 Image link:
5 Location: 2011/08/Resistor-change-ECM-Mic-Preamplifier.jpg
6 Width: 267 px
7 Height: 267 px

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