DGB
Newbie level 2
For a hobby project I am experimenting with basic medium wave AM radio receivers and have had some success with an Op Amp radio from a circuit I found on the web. It is made using a MC 1458 dual op amp, with one element for the radio and the other as amplifier. It works fine with basic headphones but my problem is when I try additional amplifier circuits of various types they all suffer from severe distortion and “motor boating” noise.
I would like to know what may be going wrong and how to add extra amplifier stages to drive a small speaker.
I would prefer, for interest sake to make the amps. From op amps or individual transistors if possible.
Cheers
DGB
I would like to know what may be going wrong and how to add extra amplifier stages to drive a small speaker.
I would prefer, for interest sake to make the amps. From op amps or individual transistors if possible.
Cheers
DGB