Members luna5 Posted March 3, 2022 Members Share Posted March 3, 2022 I am having huge difficulty with op amp circuit used in TA7642 radios, I cannot figure out how to attach the lm301 chip to have a gain of more than 200 (10 u cap between pin 1 and 😎 if I give it too much signal in 50 k ohm pot then the radio just makes a farting noise. My problem is that I need to figure out which lowpass or highpass filtrations between the speaker pin 5 and the 470 n capacitor and which resistors I need to reduce the hissing noises without any distortion or clipping when I try to make it louder Quote Link to comment Share on other sites More sharing options...
Members Mikeo Posted March 3, 2022 Members Share Posted March 3, 2022 Quote Link to comment Share on other sites More sharing options...
Members Mr.Grumpy Posted March 3, 2022 Members Share Posted March 3, 2022 1)This forum is about ELECTRIC GUITAR AMPLIFIERS. 2) In a normal op-amp circuit, GAIN is set by the ratio of the input resistor and negative feedback resistor. The capacitor between pins 1 and 8 is for frequency compensation, is normally a small ceramic capacitor of maybe 20 or 30 pF.  The capacitor does not set gain, you must be confused with the LM386 amplifier chip. The LM386 is not a standard op-amp, and isn't compatible with the LM301.  1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.