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4.5 H. Magnetic P.B. Head PreAmplifier
Altec 1564A Preamp Power Supply
Altec 428B Microphone Preamplifier schematic
API 321 mic preamp schematic
Audio Pre-Amplifier
Audio PreAmplifier (Reconnsworld) - this is a
very easy circuit to build, all parts can be found
at the local electronics shop, no matter how
worthless it (the local shop,) usually is..
Balanced Low Noise Microphone Preamp - very low
noise, close to oretical minimum, high hum
rejection and variable gain with a single rotary
pot, similar to that used in many professional grade
mixing desks
Balanced Microphone Preamp
Band 2 PreAmplifier
Car PreAmplifier & Artificial Earth - Especially
for car audio installations, can be used for any
single supply system
Computer Microphone - circuit by Lazar Pancic
- adapting electret microphone to soundcards with
dynamic microphone inputs
Digital Quality Microphone Pre Ampl. using the Model
425 Opamp
Dual Mike Preamp power supply Gerber
Dynamic Microphone Preamp
- Notice how the
transistor bias current flows through the
microphone. A similar circuit can be used with an 8
ohm speaker but in that case you would put it in
place of the emitter resistor.
Dynamic Microphone Preamplifier
ECM Mic Preamplifier
- A high quality preamp
for electret mic inserts
Electret MIC Amplifier
FET Preamp Cable
FM Band PreAmplifier |
