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13th January 2016 at 21:10 #26725
Participant
Thanks!
You are correct about how I need to leave the ring disconnected.
It would be nice if I could use a smaller pre-amp, so I looked for some.
I think this listing looks appropriate. (I have mono input.)
I had trouble finding a listing that discussed the electrical characteristics of the pre-amp, but I see that this other (stereo) board uses the PAM8403 chip, of which I found the datasheet. The attached table, from the datasheet, lists output voltages that look okay to me.
Maybe I’ll get both.
Does that sound right?
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