LM-386N-1 Amplifier Noise Problem?

Thread Starter

ramazanalkan

Joined Dec 12, 2018
19
Hi, I finded a circuit and it is working I am using 20w car speaker like volume level 10 no problem but later so much noise this circuit creator using for this 100nF Oscilloscope is giving 2.2MHZ frequency.

I did same think but not worked for me.How can I remove this 2.2MHZ Output Noise frequency?
Sory my bad english.



Circuit by afrotechmods.
 

Attachments

Last edited:

DickCappels

Joined Aug 21, 2008
6,640
The network on the output is not the Zobel network that National Semiconductor recommends for compensating for the speaker's inductance.

upload_2019-1-2_17-47-1.png
You might want to try this network (0.05 uf -anyting from 0.047 to 0.1 uf, and the 10 ohm resistor and see whether that cures the noise and oscillation problem.
 
Top