Radio Theory and design

Adding a second mosfet produces a large increase in output. The circuit could be tweaked for more porformance.

100uv signal will drive the earbud. 1mv signal produces 400ua which is half the ear bubs max rating. 10 mv is near 4ma drive whic...

The first step is finding a valve that will produce the desired current through the transformer and determine the signal needed to produc...

I will make a series of screen shots with the transformer response displaying the circuit response to varying conditions and then pose the ...

A low part count 100mw amp to breadboard next rainy day. EDIT: I tacked this one on a board tonight. It drives a 2" speaker to roo...

I changed R13 to 220K and the output went to 1.2 volt.

May come back to this later?