AM Radio Question, Diagram included

Hi, the attachment contains a diagram of the AM radio circuit we built for a lab

I have a question about Figure 2 Section 3. From what I understand, audiable information is encoded as amplitude of a low frequency signal. This signal "rides" on the broadcasted high frequency signal. Sectopm 3 is a low-pass filter that filters out the high frequency.

Here is the question: for the 0.1uFD capacitor, what will be the optimum resistor value? Why?

My text book has example of low pass filter, but it's a RC circuit in series. I don't know how a parallel RC circuit will behave

Thanks for any suggestion

wiring diagram of electronic viewfinder

I need to know the wiring diagram of electronic viewfinder type VF-240 that of a Sony Handycam model CCD-V30E,especialy the port between the camera and the viewfinder.Thank you.

Oh man, I didn't realize that my pdf attachment is rejected

here it is!

See my reply here.