I need help,
I need to know how to couple the output of this vintage radio to a class d amp. I want to replace the power output transistor with the class d amp. The input impedance of the class d amp is 10k ohms. I beleive its best to use a coupling capacitor and a signal attenuator instead of using direct couplimg. So if you use a coupling capacitor how would you calculate the value and add a signal attenuator.
Thanks in advance,

Jeff Miller

 

1 to 10 μF should be ok.
What you want to listen for is if there is loss in bass response you need to increase the capacitance.

 

I need help,
I need to know how to couple the output of this vintage radio to a class d amp. I want to replace the power output transistor with the class d amp. The input impedance of the class d amp is 10k ohms. I beleive its best to use a coupling capacitor and a signal attenuator instead of using direct couplimg. So if you use a coupling capacitor how would you calculate the value and add a signal attenuator.
Thanks in advance,

Jeff Miller

So do you think its nessasary to use a signal attentator like a 10k pot?
Thank you.
Jeff