This microphone preamp allows the use of high impedance crystal microphones with amplifiers that have low impedance input. The circuit is from a Popular Electronics of the 90s. The power can be done with battery, because the consumption is low.
This microphone preamp allows the use of high impedance crystal microphones with amplifiers that have low impedance input. The circuit is from a Popular Electronics of the 90s. The power can be done with battery, because the consumption is low.
