Posted on Jan 18, 2013

Ul, an FET op amp needs a bipolar voltage atpins 4 and 7 with a common ground for optimum gain. You can calculate the gain by dividing R2 by Rl. Zero-set balance can be had through pins i and 5 through R3. Put a voltmeter between pin 6 and ground and adjust R3 for zero voltage. Once you`ve established that, you can measure the ohmic resistance at each side of R3`s center tap and replace the potentiometer with fixed resistors.

Click here to download the full size of the above Circuit.

R6, R7, RS,and C3 forrn a tone control that will give you added bass boost, if needed;

Leave Comment

characters left:

New Circuits



Popular Circuits

Back to qrss
RS232 transceiver circuits
12 Volt Lead Acid Battery Meter Led
5V Power Supply Circuit Using Overvoltage Protection
lm317 universal battery charger circuit
FM telephone bug
TDA9813T TDA9813T VIF-PLL With QSS-IF And Dual FM-PLL Demodulator
Usb To Rs232 Uart Serial Converter Pcb
Fade or gradually eliminate style lighting controller circuit
Voltage feedback closed loop speed control system