Radio Theory and design

A wire with no current flow will have its charges in random directions. They could be in the four compass points and an infinite number ...

Einstein would use real world examples to study the invisible world. I am not the genius he was but I will attempt a simple analogy. First ...

We start with a general purpose transistor and 4 resistors. The resistors I'm using are 100k, 10k, 4k7 and 511. I use these bec...

A piece of formica counter top and some copper tape can be used as the circuit board. The back of the board will take glue bette...

These amps are designed to use 'universal' parts at AF. You can use adjust the capacitors and use them at higher frequencies. The...

I finished the sim on Ryan's receiver and added an audio amp.  15uw would be more than enough to rattle my earbud. The output could b...

The antenna is 200 ohm so the common base is a good Z match. I set the generator at 200 ohms with 1 mv out. The input is 500uv....