Voltase hobby

This is a Simple Mosfet Buffer Amplifier Circuit Diagram, A MOSFET is used as a wide-band buffer amplifier. T1 is wound on a toroid of approximately /f diameter, with material suitable for frequency (usually 1- to 20-MHz range). The turns ratio should be about 4:1 depending on load impedance. Typically, at 4 MHz, there are 18 turns on the primary, 4 turns on the secondary, and the stage gain is about 14-dB voltage (ZL - 50 ).