If you have vinyl records, lovye and even a work of sero pezojelektri player for them, the great temptation of the old gram records to digitize. So much so that now it is capable of virtually any modern personal computer. But, when you try to connect the old vacation outlet device (EDA) with piezo electric screw zvukosni matelja you face problem my agreement. Because the input impedance of the sound card is not large, and EDA vysokoomen. If you connect the as-is, write turns out obnoxious.
Need a pre-amplifier for harmonization with the entrance of EDA exit taking the sound card of your PC. The easiest way to do this using istokovyh repeaters on FET low, for example, as shown in this illustration.
Signals from the piezoelectric pickups come through connectors X 1 and X 2 on the closures of FET VT1 and VT2 through level regulators for high ohm variable resistors R1 and R2.
Output signals with the origins of VT1 and VT2 through the condensers C2 and C3 and connectors X 4 and X 5 are received at the input of the sound card.
Источник питания – 9-12В. Лучше если батарейный.
Author: Belonogov A.
