Radio Theory and design

For the test I'll use a 15 Volt 80 ma lamp. With 120 VAC at 60 Hertz. I made the little test board with 2 lamps. the caps are ...

Remember the sine wave is generated by the rotating vector. The amplitude of the peak can be determined as the sine of the angle at any g...

The designer in training has a new project to consider. This one is really cool. It does have a couple of underlying factors that can eas...

40/80 continues My friend and I designed the 40/80 in 2018. We used NE612 for the mixers and a logic chip for the oscillator. It was a u...

This simple oscillator will drive a converter to feed DBM or Gilbert Cell. The first step in building a new radio will be the LDO. It can...

Rotating the phasor creates a sine wave. The amplitude of the phasor is the sine of the angle (Assuming a max amplitude of 1). If the max...

In this series of screen shots I show a transmission line with different feed Z and load Z. Questions: What ef...