Radio Theory and design

This circuit uses 2N2222, 2N3904 and 2N3906. The one I built uses S9014, SS8850 and SS8050 . It is rated 2 watts. I'm driving a headse...

 The 80 meter band is busy. Being side band you don't see any carriers and the side band bounce as they talk. The strong AM ...

This one has a good theory of operation in the text. With 170ua @ 9 volts it is less than 2 mw It should give good battery life.  ...

The law of inertia states a body at rest wants to remain at rest and a body in motion wants to remain in motion. This law applied to current...

My friend Pat Pending sent me this one. It is worth a look. I would have to make some changes to build it with my materials on hand. Diode...

My first post was an op amp radio. It used a LM741 which is a 1Mhz amp. I built it with a NE5532 which is rated at 5Mhz. It was designed to ...

A slick little circuit made with 6 transistors, 2 resistors, and a transformer. It is available as an IC but what's the fun in buying a ...