Radio Theory and design

I lowered the AM signal to see how the set responded. The blue is AM and the red is the audio on the transformer input. The AM is still ...

The little AF amp is so sensitive it tends to pick up noise and I had to tame the rascal. I built a new one on a handy box cover. For those ...

The oscillator we intend to use. In the final project we will use a DBM but for the sim I used this product detector bec...

 Fair Radio is selling these 2 pounds for $10. The board is 4" X 6". I'm testing according to the attached article. ...

 In the previous version I used 220mh chokes. I have some on hand so why not? This is not a common junk box item so I did another with som...

I decided this one is a keeper so I installed a phone jack and an output transformer. The observant one will notice the transformer has a...

I built this one last night. I hooked my AF generator to it with the output at minimum. I could hear the tone. I put my meter across the i...