Re: OP-AMP Speaker amplifier for PSK31
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On Mon, Jun 18, 2018 at 11:26 AM, W3BK_Paul via Groups.Io <paul2n2222@...> wrote:
I have designed an op-amp speaker amplifier to amplify the audio from a communication speaker and boost the audio level to the sound card LINE IN port. The advantage is that you can turn down the audio to the speaker but still have enough to drive FLDIGI or any other program. Makes for more comfortable listening. I will post the circuit if anybody is interested. Circuit consists of one LM324 op-amp and a 9 volt wall wart.