ina217 preamp

C1, C2, and C3 are miniature ceramic or plastic trimmers. T1 (main winding) has an inductance of 0.34 µH, utilizing 11 turns of No. 24 enameled wire wound on a T37-10 toroid core. The antenna winding consists of one...

V1 and V2 are 12AX7 dual triodes. Each half of V1 is configured as a Class A voltage amplifier in a Common Cathode arrangement. In contrast, both halves of V2 are connected in a Cathode Follower configuration to provide...

Simple circuitry suitable for moving-magnet cartridges. Passive high-frequency equalization. This simple but efficient circuit devised for cheap moving-magnet cartridges can be used in connection with the audio power amplifiers shown in these webpages, featuring low noise, good RIAA frequency...

The computer needs at least 180 millivolts peak-to-peak and the condenser microphone in my headset produces about 20 millivolts peak-to-peak into a 2.2k load with normal speech levels. There are USB ports on the machines, so I can use...

This design adopts a well established circuit topology for the power amplifier, using a single-rail supply of about 60V and capacitor-coupling for the speaker(s). The advantages for a guitar amplifier are the very simple circuitry, even for comparatively high...

A high-quality preamplifier with tone controls consisting of three circuits. The NE5532 is chosen as the main integrated circuit due to its ultra-low noise properties, making it a popular choice in fine audio applications. Although these circuits are older...