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Sunday 5 January 2014

STP-0977PA

Created in 2012
It was a preamplifier applicable at 30v. It was a low noise and balanced pre-amp for the microphones.
It has a 50K pot to set the gain of input.
It was based on BC109 and BC547,C9013 etc  common NPN and PNP transistors.

It was about to modify to take it to 12v but the project kept in store and wasn't modified. It is still waiting for attention.

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