Radio Theory and design

This little 3 stage amp works really well in sim. R4 and R5 form a voltage divider for the degenerative feedback. They could be replaced ...

The old world way of doing it. Based on the formulas posted earlier.

The input should be matched to the antenna and the amp input. I will use a bandpass filter for 80 meters. First the page from the book. an...

Years ago my friend Andy built the 40/80. It is a good example of the dual conversion as presented in the block diagram. What I h...

If you observed the effects of adjusting the Vcap ratio by adjusting the low end capacitance and the high end by adjusting the "trimmer...