Radio Theory and design

In this book Mr Millman gives this simple statement.  For a push pull amp N1 is from the center tap to one end.

 I used a coil calculator to see the inductance for four coils. They have 1, 2, 3 and 4 turns. The 2T coils has 4 times the i...

 Using a 120 volt to 12 volt transformer what is the turns ratio? 120 / 12 = 10. What is the reactance ratio for the coils? Look at th...

This test jig is ideal. I don't have a variac so I use my signal generator. It will deliver 10 volts. If that is not enough I reverse...

The turns ratio will determine the voltage transformation in a simple direct way. A 10:1 ratio will reduce 120 volts to 12 volts. How does ...

This is the first post I made. I'm revisiting the idea of making an audio amp with an OpAmp. I will use a LM358. It is a dual section...

If you installed LTspice IV and the update you have a valve library waiting to be used. I will show where it is and how to access it. Op...