Designing Class A Amplifier with 12V Power Supply

[carmen77]

Homework Statement

Designing a Class A amplifier for project with high voltage gain and high efficency or at least as high as we can get. It has to have a 12V power supply. We have the design but the when we add the power supply that converts the 120v ac to 12v dc our output voltage goes completely wack and isn't smooth at all, yet what's coming out of the rectifier is 12V according to multisim, so what's the problem?

Homework Equations

The Attempt at a Solution

I attached a picture of the circuit with the Vp-p output and the power supply output. This circuit doesn't produce a smooth AC output voltage when the power supply is connected.

 

[technician]

If the supply voltage is not smooth it suggests your smoothing capacitors are too small.
I think I can see 1mF before the voltage regulator and 100nF after the regulator
Do you mean 1 microFarad by 1mF or 1 milliFarad?
100nF means 100 nanoFarads
These seem small for smoothing capacitors.

 

[skeptic2]

Can describe how you arrived at the values of the resistors and capacitors?