Radio Theory and design

Before we can examine a detector we must define the type - high level or low level? The diode has 3 sections in its characteristic curve. It...

 Just putting this here before I misplace it.   https://www.clooms.com/50-ohm/    

 These scans from the calculator should tell the story. It appears to be a matter of construction. So why 50 OHMs?

 The old saw is to obtain max power transfer you must match the source and load Z. The part that is left out is WHEN Zin = Zout half the pow...

 

Using an op amp  for a simple radio. Single 9 volt supply. An example of how to "split" the supply ans create a reference for the ...

This little circuit is a start point for an active antenna. I labeled some tie pints to help with the hookup. The gain is good. Look at the ...