This circuit Dynamic Microphone Preamp,Pre MIC 3 Transister mono.
By Transister Part C945= 3 part.(TR1-TR3) OR C828 OR C458
Supply Volt 12V - 24V.
Easy to build and low cost.
Circuit Pre MIC - 3 Transister (C945) mono 
PCB Pre MIC - 3 Transister (C945) mono
Wednesday, May 2, 2007
Pre MIC - 3 Transister (C945) mono
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So, I just pulled three C945's from a toy 27mhz transmitter that I converted to run a 433mhz TX module instead, just because. I googled what to do with the left-over junk and found this page and now it's on. Thanks for the momentum.
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